10-K 1 a2014oge10-k.htm OGE ENERGY CORP. 10-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
(Mark One)
x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2014
OR
o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from _____to_____
Commission File Number: 1-12579
OGE ENERGY CORP.
(Exact name of registrant as specified in its charter)

Oklahoma |  | 73-1481638
(State or other jurisdiction of |  | (I.R.S. Employer
incorporation or organization) |  | Identification No.)

321 North Harvey
P.O. Box 321
Oklahoma City, Oklahoma 73101-0321
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code: 405-553-3000
Securities registered pursuant to Section 12(b) of the Act:

Title of each class | Name of each exchange on which registered
Common Stock | New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.
þ Yes o No
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.
o Yes þ No
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. þ Yes o No
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). þ Yes o No
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. þ
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer þ | Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company) | Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). o Yes þ No
At June 30, 2014, the last business day of the registrant's most recently completed second fiscal quarter, the aggregate market value of shares of common stock held by non-affiliates was $7,749,203,331 based on the number of shares held by non-affiliates (198,290,771) and the reported closing market price of the common stock on the New York Stock Exchange on such date of $39.08.
At January 30, 2015, there were 199,481,971 shares of common stock, par value $0.01 per share, outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
The Proxy Statement for the Company's 2015 annual meeting of shareowners is incorporated by reference into Part III of this Form 10-K.

OGE ENERGY CORP.
FORM 10-K
FOR THE YEAR ENDED DECEMBER 31, 2014
TABLE OF CONTENTS

| Page
GLOSSARY OF TERMS | ii
FORWARD-LOOKING STATEMENTS | 1
Part I |
Item 1. Business | 2
The Company | 2
Electric Operations - OG&E | 3
Natural Gas Midstream Operations | 11
Environmental Matters | 13
Finance and Construction | 14
Employees | 16
Executive Officers | 17
Access to Securities and Exchange Commission Filings | 19
Item 1A. Risk Factors | 19
Item 1B. Unresolved Staff Comments | 40
Item 2. Properties | 41
Item 3. Legal Proceedings | 42
Item 4. Mine Safety Disclosures | 42
Part II |
Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities | 43
Item 6. Selected Financial Data | 45
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations | 46
Item 7A. Quantitative and Qualitative Disclosures About Market Risk | 73
Item 8. Financial Statements and Supplementary Data | 75
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure | 129
Item 9A. Controls and Procedures | 129
Item 9B. Other Information | 132
Part III |
Item 10. Directors, Executive Officers and Corporate Governance | 132
Item 11. Executive Compensation | 132
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 132
Item 13. Certain Relationships and Related Transactions, and Director Independence | 132
Item 14. Principal Accounting Fees and Services | 132
Part IV |
Item 15. Exhibits, Financial Statement Schedules | 132
Signatures | 139

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GLOSSARY OF TERMS
The following is a glossary of frequently used abbreviations that are found throughout this Form 10-K.

Abbreviation | Definition
401(k) Plan | Qualified defined contribution retirement plan
APSC | Arkansas Public Service Commission
ArcLight group | Bronco Midstream Holdings, LLC, Bronco Midstream Holdings II, LLC, collectively
ASC | Financial Accounting Standards Board Accounting Standards Codification
BART | Best available retrofit technology
Bcf | Billion cubic feet
CenterPoint | CenterPoint Energy Resources Corp., wholly-owned Subsidiary of CenterPoint Energy, Inc.
Code | Internal Revenue Code of 1986
Company | OGE Energy Corp, collectively with its subsidiaries and Enable Midstream Partners
Dry Scrubbers | Dry flue gas desulfurization units with spray dryer absorber
Enable | Enable Midstream Partners, LP, partnership between OGE Energy, the ArcLight Group and CenterPoint Energy, Inc. formed to own and operate the midstream businesses of OGE Energy and CenterPoint
Enogex Holdings | Enogex Holdings LLC, the parent company of Enogex LLC and a majority-owned subsidiary of OGE Holdings, LLC (prior to May 1, 2013)
Enogex, LLC | Enogex, LLC collectively with its subsidiaries (effective June 30, 2013, the name was changed to Enable Oklahoma Intrastate Transmission, LLC)
EPA | U.S. Environmental Protection Agency
Federal Clean Water Act | Federal Water Pollution Control Act of 1972, as amended
FERC | Federal Energy Regulatory Commission
FIP | Federal implementation plan
GAAP | Accounting principles generally accepted in the United States
MATS | Mercury and Air Toxics Standards
MMBtu | Million British thermal unit
MMcf/d | Million cubic feet per day
MW | Megawatt
MWH | Megawatt-hour
NAAQS | National Ambient Air Quality Standards
NGLs | Natural gas liquids
NOX | Nitrogen oxide
OCC | Oklahoma Corporation Commission
Off-system sales | Sales to other utilities and power marketers
OG&E | Oklahoma Gas and Electric Company, wholly-owned subsidiary of OGE Energy Corp
OGE Holdings | OGE Enogex Holdings, LLC, wholly-owned subsidiary of OGE Energy Corp, parent company of Enogex Holdings (prior to May 1, 2013) and 26.3 percent owner of Enable Midstream Partners
OSHA | Federal Occupational Safety and Health Act of 1970
Pension Plan | Qualified defined benefit retirement plan
QF | Qualified cogeneration facilities
QF contracts | Contracts with QFs and small power production producers
Regional Haze | The EPA's regional haze rule
Restoration of Retirement Income Plan | Supplemental retirement plan to the Pension Plan
SESH | Southeast Supply Header, LLC
SIP | State implementation plan
SO2 | Sulfur dioxide
SPP | Southwest Power Pool
Stock Incentive Plan | 2013 Stock Incentive Plan
System sales | Sales to OG&E's customers
TBtu/d | Trillion British thermal units per day

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FORWARD-LOOKING STATEMENTS
Except for the historical statements contained herein, the matters discussed in this Form 10-K, including those matters discussed in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations," are forward-looking statements that are subject to certain risks, uncertainties and assumptions. Such forward-looking statements are intended to be identified in this document by the words "anticipate", "believe", "estimate", "expect", "intend", "objective", "plan", "possible", "potential", "project" and similar expressions. Actual results may vary materially from those expressed in forward-looking statements. In addition to the specific risk factors discussed in "Item 1A. Risk Factors" and "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" herein, factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to:

• | general economic conditions, including the availability of credit, access to existing lines of credit, access to the commercial paper markets, actions of rating agencies and their impact on capital expenditures;

• | the ability of the Company and its subsidiaries to access the capital markets and obtain financing on favorable terms as well as inflation rates and monetary fluctuations;

• | prices and availability of electricity, coal, natural gas and NGLs;

• | the timing and extent of changes in commodity prices, particularly natural gas and NGLs, the competitive effects of the available pipeline capacity in the regions Enable serves, and the effects of geographic and seasonal commodity price differentials, including the effects of these circumstances on re-contracting available capacity on Enable's interstate pipelines;

• | the timing and extent of changes in the supply of natural gas, particularly supplies available for gathering by Enable's gathering and processing business and transporting by Enable's interstate pipelines, including the impact of natural gas and NGLs prices on the level of drilling and production activities in the regions Enable serves;

• | business conditions in the energy and natural gas midstream industries, including the demand for natural gas, NGLs, crude oil and midstream services;

• | competitive factors including the extent and timing of the entry of additional competition in the markets served by the Company;

• | unusual weather;

• | availability and prices of raw materials for current and future construction projects;

• | Federal or state legislation and regulatory decisions and initiatives that affect cost and investment recovery, have an impact on rate structures or affect the speed and degree to which competition enters the Company's markets;

• | environmental laws and regulations that may impact the Company's operations;

• | changes in accounting standards, rules or guidelines;

• | the discontinuance of accounting principles for certain types of rate-regulated activities;

• | the cost of protecting assets against, or damage due to, terrorism or cyber attacks and other catastrophic events;

• | advances in technology;

• | creditworthiness of suppliers, customers and other contractual parties;

• | difficulty in making accurate assumptions and projections regarding future revenues and costs associated with the Company's equity investment in Enable that the Company does not control; and

• | other risk factors listed in the reports filed by the Company with the Securities and Exchange Commission including those listed in "Item 1A. Risk Factors" and in Exhibit 99.01 to this Form 10-K.

The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.
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PART I
Item 1. Business.
THE COMPANY
Introduction
The Company is an energy and energy services provider offering physical delivery and related services for both electricity and natural gas primarily in the south central United States. The Company conducts these activities through two business segments: (i) electric utility and (ii) natural gas midstream operations. The accounts of OGE Energy and its wholly owned and majority owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation. OGE Energy generally uses the equity method of accounting for investments where its ownership interest is between 20% and 50% and has the ability to exercise significant influence. The Company was incorporated in August 1995 in the state of Oklahoma and its principal executive offices are located at 321 North Harvey, P.O. Box 321, Oklahoma City, Oklahoma 73101-0321; telephone 405-553-3000.
The electric utility segment generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are conducted through OG&E and are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory, and is a wholly owned subsidiary of the Company. OG&E is the largest electric utility in Oklahoma and its franchised service territory includes the Fort Smith, Arkansas area. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business.
The natural gas midstream operations segment currently represents the Company's investment in Enable through its wholly owned subsidiary OGE Holdings. Enable is engaged in the business of gathering, processing, transporting and storing natural gas. Enable's natural gas gathering and processing assets are strategically located in four states and serve natural gas production from shale developments in the Anadarko, Arkoma and Ark-La-Tex basins. Enable also owns an emerging crude oil gathering business in the Bakken shale formation, principally located in the Williston basin. Enable's natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois. For periods prior to the formation of Enable, the natural gas midstream operations segment reflected the consolidated results of Enogex Holdings.
Enable was formed effective May 1, 2013 by OGE Energy, the ArcLight group and CenterPoint Energy, Inc. to own and operate the midstream businesses of OGE Energy and CenterPoint. In the formation transaction, OGE Energy and ArcLight contributed Enogex LLC to Enable and the Company deconsolidated its previously held investment in Enogex Holdings and acquired an equity interest in Enable. The Company's contribution of Enogex LLC to Enable met the requirements of being in substance real estate and was recorded at historical cost. The general partner of Enable is equally controlled by CenterPoint and OGE Energy, who each have 50 percent management ownership. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, OGE Energy began accounting for its interest in Enable using the equity method of accounting.
On April 16, 2014, Enable completed an initial public offering of 25,000,000 common units resulting in Enable becoming a publicly traded Master Limited Partnership. The offering represented approximately 6.0 percent of the limited partner interests and raised approximately $464 million in net proceeds for Enable. In connection with the offering, underwriters exercised their option to purchase 3,750,000 additional common units which were fulfilled with units held by ArcLight. As a result of the offering, OGE Holding's ownership was reduced from 28.5 percent to 26.7 percent. In connection with Enable’s initial public offering, approximately 61.4 percent of OGE Holdings and CenterPoint’s common units were converted into subordinated units. As a result, following the initial public offering, OGE Holdings owned 42,832,291 common units and 68,150,514 subordinated units of Enable.
On May 13, 2014, CenterPoint exercised its put right with respect to a 24.95 percent interest in SESH and pursuant to that right, on May 30, 2014, Enable issued 6,322,457 common units representing limited partner interests in Enable in exchange for CenterPoint's 24.95 percent interest in SESH. At December 31, 2014, OGE Energy held 26.3 percent of the limited partner interests in Enable.
On January 26, 2015, Enable announced a quarterly dividend distribution of $0.30875 per unit on its outstanding common and subordinated units, representing an increase of approximately 2.1 percent over the prior quarter distribution. Enable's gross
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margins are affected by commodity price movements. Based on forward commodity prices, Enable expects to see a change in producer activity that will affect its future distribution growth rate. If cash distributions to Enable’s unitholders exceed $0.330625 per unit in any quarter, the general partner will receive increasing percentages, up to 50 percent, of the cash Enable distributes in excess of that amount. OGE Holdings is entitled to 60 percent of those “incentive distributions.”
Company Strategy
The Company's mission, through OG&E and its equity interest in Enable, is to fulfill its critical role in the nation's electric utility and natural gas midstream pipeline infrastructure and meet individual customers' needs for energy and related services focusing on safety, efficiency, reliability, customer service and risk management. The Company's corporate strategy is to continue to maintain its existing business mix and diversified asset position of its regulated electric utility business and interest in a publicly traded midstream company, while providing competitive energy products and services to customers as well as seeking growth opportunities in both businesses.
OG&E is focused on:

• | Providing exceptional customer experiences by continuing to improve customer interfaces, tools, products and services that deliver high customer satisfaction and operating productivity.

• | Providing safe, reliable energy to the communities and customers we serve. A particular focus is on enhancing the value of the grid by improving distribution grid reliability by reducing the frequency and duration of customer interruptions and leveraging previous grid technology investments.

• | Maintaining strong regulatory and legislative relationships for the long-term benefit of our customers, investors and members.

• | Continuing to grow a zero-injury culture and deliver top-quartile safety results.

• | Expanding transmission investments beyond traditional opportunities.

• | Executing on the Company’s Environmental Compliance Plan.

• | Ensuring we have the necessary mix of generation resources to meet the long term needs of our customers.

• | Continuing focus on operational excellence and efficiencies in order to protect the customer bill.

Additionally, the Company wants to achieve a premium valuation of its businesses relative to its peers, grow earnings per share with a stable earnings pattern, create a high performance culture and achieve desired outcomes with target stakeholders. The Company's financial objectives include a long-term annual earnings growth rate for OG&E of three to five percent on a weather-normalized basis, maintaining a strong credit rating as well as targeting dividend increases of approximately 10 percent annually through 2019. The targeted annual dividend increase has been determined after consideration of numerous factors, including the largely retail composition of the Company's shareholder base, the Company's financial position, the Company's growth targets and the composition of the Company's assets and investment opportunities. The Company also relies on cash distributions from its investment in Enable to fund its capital needs and support future dividend growth. The cash distributions from Enable are expected to grow 3 percent to 7 percent in 2015 from the fourth quarter 2014 distribution. The Company believes it can accomplish these financial objectives by, among other things, pursuing multiple avenues to build its business, maintaining a diversified asset position, continuing to develop a wide range of skills to succeed with changes in its industries, providing products and services to customers efficiently, managing risks effectively and maintaining strong regulatory and legislative relationships.
ELECTRIC OPERATIONS - OG&E
General
The electric utility segment generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are conducted through OG&E. OG&E furnishes retail electric service in 267 communities and their contiguous rural and suburban areas. As of December 31, 2014, two rural electric cooperatives in Oklahoma and western Arkansas purchased electricity from OG&E for resale. The service area covers 30,000 square miles in Oklahoma and western Arkansas, including Oklahoma City, the largest city in Oklahoma, and Fort Smith, Arkansas, the second largest city in that state. Of the 267 communities that OG&E serves, 241 are located in Oklahoma and 26 in Arkansas. OG&E derived 90 percent of its total electric operating revenues in 2014 from sales in Oklahoma and the remainder from sales in Arkansas.
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OG&E's system control area peak demand in 2014 was 6,339 MWs on August 25, 2014. OG&E's load responsibility peak demand was 5,813 MWs on August 25, 2014. As reflected in the table below and in the operating statistics that follow, there were 28.0 million MWH system sales in 2014, 28.2 million MWH system sales in 2013 and 28.0 million MWH system sales in 2012. Variations in system sales for the three years are reflected in the following table:

Year ended December 31 | 2014 | 2014 vs. 2013 Decrease | 2013 | 2013 vs. 2012 Increase | 2012
System sales - millions of MWHs | 28.0 | (0.7)% | 28.2 | 0.7% | 28.0

OG&E is subject to competition in various degrees from government-owned electric systems, municipally-owned electric systems, rural electric cooperatives and, in certain respects, from other private utilities, power marketers and cogenerators. Oklahoma law forbids the granting of an exclusive franchise to a utility for providing electricity.
Besides competition from other suppliers or marketers of electricity, OG&E competes with suppliers of other forms of energy. The degree of competition between suppliers may vary depending on relative costs and supplies of other forms of energy. It is possible that changes in regulatory policies or advances in newer technologies such as fuel cells, microturbines, windmills and photovoltaic solar cells will reduce costs of new technology to levels that are equal to or below that of most central station electricity production. Our ability to maintain relatively low cost, efficient and reliable operations is a significant determinate of our competitiveness.
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OKLAHOMA GAS AND ELECTRIC COMPANY
CERTAIN OPERATING STATISTICS
Year ended December 31 | 2014 | 2013 | 2012
ELECTRIC ENERGY (Millions of MWH) |  |  |
Generation (exclusive of station use) | 22.8 |  | 24.2 |  | 26.3 |
Purchased | 8.8 |  | 6.3 |  | 5.0 |
Total generated and purchased | 31.6 |  | 30.5 |  | 31.3 |
OG&E use, free service and losses | (1.4 | ) | (1.9 | ) | (1.9 | )
Electric energy sold | 30.2 |  | 28.6 |  | 29.4 |
ELECTRIC ENERGY SOLD (Millions of MWH) |  |  |
Residential | 9.4 |  | 9.4 |  | 9.1 |
Commercial | 7.2 |  | 7.1 |  | 7.0 |
Industrial | 3.8 |  | 3.9 |  | 4.0 |
Oilfield | 3.4 |  | 3.4 |  | 3.3 |
Public authorities and street light | 3.2 |  | 3.2 |  | 3.3 |
Sales for resale | 1.0 |  | 1.2 |  | 1.3 |
System sales | 28.0 |  | 28.2 |  | 28.0 |
Off-system sales | 2.2 |  | 0.4 |  | 1.4 |
Total sales | 30.2 |  | 28.6 |  | 29.4 |
ELECTRIC OPERATING REVENUES (In millions) |  |  |
Residential | $ | 925.5 |  | $ | 901.4 |  | $ | 878.0 |
Commercial | 583.3 |  | 554.2 |  | 523.5 |
Industrial | 224.5 |  | 220.6 |  | 206.8 |
Oilfield | 188.3 |  | 176.4 |  | 163.4 |
Public authorities and street light | 220.3 |  | 214.3 |  | 202.4 |
Sales for resale | 52.9 |  | 59.4 |  | 54.9 |
System sales revenues | 2,194.8 |  | 2,126.3 |  | 2,029.0 |
Off-system sales revenues | 94.1 |  | 14.7 |  | 36.5 |
Other | 164.2 |  | 121.2 |  | 75.7 |
Total operating revenues | $ | 2,453.1 |  | $ | 2,262.2 |  | $ | 2,141.2 |
ACTUAL NUMBER OF ELECTRIC CUSTOMERS (At end of period) |  |  |
Residential | 697,048 |  | 690,390 |  | 683,214 |
Commercial | 91,966 |  | 90,279 |  | 88,772 |
Industrial | 2,901 |  | 2,921 |  | 2,957 |
Oilfield | 6,460 |  | 6,431 |  | 6,426 |
Public authorities and street light | 16,581 |  | 16,877 |  | 16,695 |
Sales for resale | 26 |  | 42 |  | 46 |
Total | 814,982 |  | 806,940 |  | 798,110 |
AVERAGE RESIDENTIAL CUSTOMER SALES |  |  |
Average annual revenue | $ | 1,334.05 |  | $ | 1,312.59 |  | $ | 1,292.11 |
Average annual use (kilowatt-hour) | 13,540 |  | 13,718 |  | 13,477 |
Average price per kilowatt-hour (cents) | $ | 9.85 |  | $ | 9.57 |  | $ | 9.59 |

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Regulation and Rates
OG&E's retail electric tariffs are regulated by the OCC in Oklahoma and by the APSC in Arkansas. The issuance of certain securities by OG&E is also regulated by the OCC and the APSC. OG&E's wholesale electric tariffs, transmission activities, short-term borrowing authorization and accounting practices are subject to the jurisdiction of the FERC. The Secretary of the U.S. Department of Energy has jurisdiction over some of OG&E's facilities and operations. In 2014, 84 percent of OG&E's electric revenue was subject to the jurisdiction of the OCC, eight percent to the APSC and eight percent to the FERC.
The OCC issued an order in 1996 authorizing OG&E to reorganize into a subsidiary of OGE Energy. The order required that, among other things, (i) OGE Energy permit the OCC access to the books and records of OGE Energy and its affiliates relating to transactions with OG&E, (ii) OGE Energy employ accounting and other procedures and controls to protect against subsidization of non-utility activities by OG&E's customers and (iii) OGE Energy refrain from pledging OG&E assets or income for affiliate transactions. In addition, the Energy Policy Act of 2005 enacted the Public Utility Holding Company Act of 2005, which in turn granted to the FERC access to the books and records of OGE Energy and its affiliates as the FERC deems relevant to costs incurred by OG&E or necessary or appropriate for the protection of utility customers with respect to the FERC jurisdictional rates.
Completed Regulatory Matters
Market-Based Rate Authority
On June 29, 2012, OG&E filed its triennial market power update with the FERC to retain its market-based rate authorization in the SPP's energy imbalance service market but to surrender its market-based rate authorization for any market-based rates sales outside of the SPP's energy imbalance service market. On May 2, 2013, the FERC issued an order accepting OG&E's June 2012 triennial market power update.
On December 30, 2013, OG&E submitted to the FERC a market-based rate change in status filing and a revised market-based rate tariff that would authorize OG&E to (i) sell electric energy and capacity at market-based rates without geographic restriction, and (ii) sell ancillary services in the SPP and Midcontinent Independent System Operator, Inc. markets. The primary goal of this filing was to implement the market-based rate authority OG&E needs to fully participate in SPP’s Integrated Marketplace. On February 28, 2014, FERC issued a letter order accepting OG&E’s market-based rate filing and tariff effective March 1, 2014. FERC found that OG&E passed the market power screens and satisfied requirements related to horizontal market power and vertical market power.
Section 206 Complaint
On November 26, 2013, Arkansas Electric Cooperative Corporation filed a complaint at the FERC against OG&E, arguing that the wholesale formula rate contract between OG&E and Arkansas Electric Cooperative Corporation (formerly between OG&E and Arkansas Valley Electric Cooperative) is unjust and unreasonable with respect to several items. OG&E and Arkansas Electric Cooperative Corporation agreed to terms of a settlement and filed the offer of settlement with the FERC on February 24, 2014. On April 17, 2014, the FERC accepted the settlement making it effective March 1, 2014. The reduction in revenue for 2014 was $0.9 million.
Fuel Adjustment Clause Review for Calendar Year 2012
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2013, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2012, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on October 9, 2013. On April 24, 2014, the OCC administrative law judge at the hearing, on the merits, recommended that the OCC find that OG&E's 2012 electric generation, purchased power and fuel procurement processes and costs were prudent. On June 10, 2014, the OCC issued an order approving OG&E’s practices, policies and judgment regarding its electric generation, purchased power, and fuel procurement processes and costs for the calendar year 2012. The order also found that the costs were prudent, reasonable, and mathematically correct.
Integrated Resource Plans
In June 2014, OG&E initiated the process to update its Integrated Resource Plans in Oklahoma and Arkansas at OG&E's discretion. The prior Integrated Resource Plan, submitted in 2012, assumed that the Oklahoma SIP would be followed to comply with Regional Haze requirements. Subsequent to holding technical conferences and public stakeholder meetings, OG&E submitted
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its revised Integrated Resource Plans, which included its environmental compliance plan described below, to the OCC on August 4, 2014 and to the APSC on September 8, 2014.
Pending Regulatory Matter s
FERC Order No. 1000, Final Rule on Transmission Planning and Cost Allocation
On July 21, 2011, the FERC issued Order No. 1000, which revised the FERC's existing regulations governing the process for planning enhancements and expansions of the electric transmission grid in a particular region, along with the corresponding process for allocating the costs of such expansions. Order No. 1000 leaves to individual regions to determine whether a previously-approved project is subject to reevaluation and is therefore governed by the new rule.
Order No. 1000 requires, among other things, public utility transmission providers, such as the SPP, to participate in a process that produces a regional transmission plan satisfying certain standards, and requires that each such regional process consider transmission needs driven by public policy requirements (such as state or Federal policies favoring increased use of renewable energy resources). Order No. 1000 also directs public utility transmission providers to coordinate with neighboring transmission planning regions. In addition, Order No. 1000 establishes specific regional cost allocation principles and directs public utility transmission providers to participate in regional and interregional transmission planning processes that satisfy these principles.
On the issue of determining how entities are to be selected to develop and construct the specific transmission projects, Order No. 1000 directs public utility transmission providers to remove from the FERC-jurisdictional tariffs and agreements provisions that establish any Federal "right of first refusal" for the incumbent transmission owner (such as OG&E) regarding transmission facilities selected in a regional transmission planning process, subject to certain limitations. However, Order No. 1000 is not intended to affect the right of an incumbent transmission owner (such as OG&E) to build, own and recover costs for upgrades to its own transmission facilities, and Order No. 1000 does not alter an incumbent transmission owner's use and control of existing rights of way. Order No. 1000 also clarifies that incumbent transmission owners may rely on regional transmission facilities to meet their reliability needs or service obligations. The SPP's pre-Order No. 1000 tariff included a "right of first refusal" for incumbent transmission owners and this provision has played a role in OG&E being selected by the SPP to build previous transmission projects in Oklahoma. These changes to the "right of first refusal" apply only to "new transmission facilities," which are facilities subject to evaluation or reevaluation (under the applicable local or regional transmission planning process) after November 13, 2012. On May 29, 2013, the Governor signed House Bill 1932 into law which establishes a right of first refusal for Oklahoma incumbent transmission owners, including OG&E, to build new transmission projects with voltages under 300 kilovolts that interconnect to those incumbent owners' existing facilities. OG&E believes this law is consistent with the language of Order No. 1000. On August 15, 2014, the U.S. Court of Appeals for the D.C. Circuit issued an order denying all appeals of Order No. 1000.
The FERC has issued two orders on the SPP's Order No. 1000 compliance filings. In its most recent order, issued October 16, 2014, the FERC confirmed that “right of first refusal” language should be removed from the SPP tariff and Membership Agreement as applied to most transmission facilities, but that several types of facilities would remain subject to a right of first refusal. Projects that retained the right of first refusal included facilities that would operate below 100 kilovolts, facilities selected as part of the SPP’s Aggregate Study process, and short-term reliability projects. The FERC also approved SPP’s new competitive solicitation process for projects that are not subject to a right of first refusal. FERC found that SPP may consider state and local laws and regulations when deciding whether SPP will hold a competitive solicitation for a proposed project. On December 15, 2014, OG&E filed an appeal in the District of Columbia Circuit Court of Appeals of a portion of the October 2014 FERC order requiring removal of the right of first refusal language from the Membership Agreement. The court has not yet acted on OG&E's appeal.
OGE Energy cannot, at this time, determine the precise impact of Order No. 1000 on OG&E. OGE Energy has no reason to believe that the implementation of Order No. 1000 will impact OG&E's transmission projects currently under development and construction for which OG&E has received a notice to proceed from the SPP.
Energy Efficiency Program Filing
On February 14, 2014, OG&E filed an application with the APSC requesting approval of interim modifications to approved Energy Efficiency Programs, new tariff revisions and the waiver of certain provisions of the Commission’s Rules for Conservation and Energy Efficiency Programs.
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Environmental Compliance Plan
On August 6, 2014, OG&E filed an application with the OCC for approval of its plan to comply with EPA’s MATS and Regional Haze FIP while serving the best long-term interests of customers in light of future environmental uncertainties. The application seeks approval of the environmental compliance plan and for a recovery mechanism for the associated costs. The environmental compliance plan includes installing dry scrubbers at Sooner Units 1 and 2 and the conversion of Muskogee Units 4 and 5 to natural gas. The application also asks the Commission to predetermine the prudence of replacing OG&E's soon-to-be retired Mustang steam turbines in late 2017 (approximately 460 MW) with 400 MW of new, efficient combustion turbines at the Mustang site in 2018 and 2019 and approval for a recovery mechanism for the associated costs. OG&E estimates the total capital cost associated with its environmental compliance plan included in this application to be approximately $1.1 billion. The OCC hearing on OG&E's application is scheduled to commence on March 3, 2015. Multiple parties advocating a variety of positions have intervened in the proceeding. OG&E expects a ruling from the OCC in the second quarter of 2015. At this time, OG&E cannot predict the outcome of the proceeding. OG&E plans to file applications in the first quarter of 2015 seeking related approvals from the APSC.
Fuel Adjustment Clause Review for Calendar Year 2013
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2014, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2013, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on September 29, 2014. A procedural schedule has not been established as of this date. OG&E expects an order in the second quarter of 2015.
Regulatory Assets and Liabilities
OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment.
OG&E records certain incurred costs and obligations as regulatory assets or liabilities if it is probable, based on regulatory orders or other available evidence, that the cost or obligation will be included in amounts allowable for recovery or refund in future rates.
At December 31, 2014 and 2013, OG&E had regulatory assets of $508.6 million and $427.9 million, respectively, and regulatory liabilities of $287.4 million and $254.4 million, respectively. See Note 1 of Notes to Consolidated Financial Statements for a further discussion.
Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets, which could have significant financial effects.
Rate Structures
Oklahoma
OG&E's standard tariff rates include a cost-of-service component (including an authorized return on capital) plus a fuel adjustment clause mechanism that allows OG&E to pass through to customers the actual cost of fuel and purchased power.
OG&E offers several alternate customer programs and rate options. Under OG&E's Smart Grid enabled SmartHours® programs, "time-of-use" and "variable peak pricing" rates offer customers the ability to save on their electricity bills by shifting some of the electricity consumption to times when demand for electricity and costs are at their lowest. The guaranteed flat bill option for residential and small general service accounts allows qualifying customers the opportunity to purchase their electricity needs at a set monthly price for an entire year. A second tariff rate option provides a "renewable energy" resource to OG&E's Oklahoma retail customers. This renewable energy resource is a Renewable Energy Credit purchase program and is available as a voluntary option to all of OG&E's Oklahoma retail customers. OG&E's ownership and access to wind resources makes the renewable option a possible choice in meeting the renewable energy needs of our conservation-minded customers. Another program
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being offered to OG&E's commercial and industrial customers is a voluntary load curtailment program called Load Reduction. This program provides customers with the opportunity to curtail usage on a voluntary basis when OG&E's system conditions merit curtailment action. Customers that curtail their usage will receive payment for their curtailment response. This voluntary curtailment program seeks customers that can curtail on most curtailment event days, but may not be able to curtail every time that a curtailment event is required. OG&E also offers certain qualifying customers "day-ahead price" and "flex price" rate options which allow participating customers to adjust their electricity consumption based on price signals received from OG&E. The prices for the "day-ahead price" and "flex price" rate options are based on OG&E's projected next day hourly operating costs.
OG&E also has two rate classes, Public Schools-Demand and Public Schools Non-Demand, that provide OG&E with flexibility to provide targeted programs for load management to public schools and their unique usage patterns. OG&E also provides service level, seasonal and time period fuel charge differentiation that allows customers to pay fuel costs that better reflect the underlying costs of providing electric service. Lastly, OG&E has a military base rider that demonstrates Oklahoma's continued commitment to our military partners.
The previously discussed rate options, coupled with OG&E's other rate choices, provide many tariff options for OG&E's Oklahoma retail customers. The revenue impacts associated with these options are not determinable in future years because customers may choose to remain on existing rate options instead of volunteering for the alternative rate option choices. Revenue variations may occur in the future based upon changes in customers' usage characteristics if they choose alternative rate options.
Arkansas
OG&E's standard tariff rates include a cost-of service component (including an authorized return on capital) plus an energy cost recovery mechanism that allows OG&E to pass through to customers the actual cost of fuel and purchased power. OG&E offers several alternate customer programs and rate options. The "time-of-use" and "variable peak pricing" tariffs allow participating customers to save on their electricity bills by shifting some of the electricity consumption to times when demand for electricity is lowest. A second tariff rate option provides a "renewable energy" resource to OG&E's Arkansas retail customers. This renewable energy resource is a Renewable Energy Credit purchase program and is available as a voluntary option to all of OG&E's Arkansas retail customers. OG&E's ownership and access to wind resources makes the renewable option a possible choice in meeting the renewable energy needs of our conservation-minded customers. OG&E offers its commercial and industrial customers a voluntary load curtailment program called Load Reduction. This program provides customers with the opportunity to curtail usage on a voluntary basis and receive a billing credit when OG&E's system conditions merit curtailment action. OG&E offers certain qualifying customers a "day-ahead price" rate option which allows participating customers to adjust their electricity consumption based on a price signal received from OG&E. The day-ahead price is based on OG&E's projected next day hourly operating costs.
Fuel Supply and Generation
In 2014, 61 percent of the OG&E-generated energy was produced by coal-fired units, 32 percent by natural gas-fired units and seven percent by wind-powered units. Of OG&E's 6,845 total MW capability reflected in the table under Item 2. Properties, 3,880 MWs, or 57 percent, are from natural gas generation, 2,516 MWs, or 37 percent, are from coal generation and 449 MWs, or six percent, are from wind generation. Over the last five years, the weighted average cost of fuel used, by type, was as follows:

Year ended December 31 (In Kilowatt-Hour - cents) | 2014 | 2013 | 2012 | 2011 | 2010
Natural gas | 4.506 | 3.905 | 2.930 | 4.328 | 4.638
Coal | 2.152 | 2.273 | 2.310 | 2.064 | 1.911
Weighted average | 2.752 | 2.784 | 2.437 | 2.897 | 3.012

The decrease in the weighted average cost of fuel in 2014 as compared to 2013 was primarily due to less natural gas used, offset by higher natural gas prices. The increase in the weighted average cost of fuel in 2013 as compared to 2012 was primarily due to higher gas prices. The decrease in the weighted average cost of fuel in 2012 as compared to 2011 was primarily due to lower natural gas prices. The decrease in the weighted average cost of fuel in 2011 as compared to 2010 was primarily due to lower natural gas prices and less natural gas used. These fuel costs are recovered through OG&E's fuel adjustment clauses that are approved by the OCC, the APSC and the FERC.
OG&E began participating in the SPP Integrated Marketplace effective March 1, 2014. The SPP Integrated Marketplace replaced the SPP Energy Imbalance Services market. As part of the Integrated Marketplace, the SPP assumed balancing authority responsibilities for its market participants. The SPP Integrated Marketplace functions as a centralized dispatch, where market participants, including OG&E, submit offers to sell power to the SPP from their resources and bid to purchase power from the
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SPP for their customers. The SPP Integrated Marketplace is intended to allow the SPP to optimize supply offers and demand bids based upon reliability and economic considerations, and determine which generating units will run at any given time for maximum cost-effectiveness. As a result, OG&E's generating units may produce output that differs from OG&E's customer load requirements. Net fuel and purchased power costs are recovered through fuel adjustment clauses.
Coal
All of OG&E's coal-fired units, with an aggregate capability of 2,516 MWs, are designed to burn low sulfur western sub-bituminous coal. OG&E has contracted for approximately 82 percent of its forecasted annual coal usage via multi-year contracts that expire in 2016. Approximately 10 percent of 2015's usage will be contracted, but undelivered coal from 2014. The remainder of the forecast needs will be procured via the spot market if necessary. In 2014, OG&E purchased 8.2 million tons of coal from various Wyoming suppliers. The combination of all coal has a weighted average sulfur content of 0.23 percent. Based upon the average sulfur content and EPA certified emission data, OG&E's coal units have an approximate emission rate of 0.5 lbs. of SO2 per MMBtu. As discussed in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Environmental Laws and Regulations," emission limits are expected to become more stringent.
During 2014, railroad cycle times for deliveries of coal to OG&E’s Sooner power plant were higher than historical cycle times. As a result, coal inventory at Sooner is below OG&E’s targeted inventory level. Currently, railroad cycle times are improving and OG&E believes the coal inventory level at Sooner will begin to revert towards OG&E’s targeted level during 2015.
See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Environmental Laws and Regulations" for a discussion of environmental matters which may affect OG&E in the future, including its utilization of coal.
Natural Gas
As a participant in the SPP integrated marketplace, OG&E now purchases a relatively small percentage of its supply through term gas agreements. Alternatively, OG&E relies on a combination of call natural gas agreements, whereby OG&E has the right but not the obligation to purchase a defined quantity of natural gas, combined with day and intra-day purchases to meet the demands of the SPP market.
On March 17, 2014, OG&E entered into a new five year firm no-notice load following gas transportation contract with Enable effective May 1, 2014.
Wind
OG&E's current wind power portfolio includes the following, in addition to the 120 MW Centennial, 101 MW OU Spirit and 227.5 MW Crossroads wind farms owned by OG&E: (i) access to up to 50 MWs of electricity generated at a wind farm near Woodward, Oklahoma from a 15-year contract OG&E entered into with FPL Energy that expires in 2018, (ii) access to up to 152 MWs of electricity generated at a wind farm in Woodward County, Oklahoma from a 20-year contract OG&E entered into with CPV Keenan that expires in 2030, (iii) access to up to 130 MWs of electricity generated at a wind farm in Dewey County, Oklahoma from a 20-year contract OG&E entered into with Edison Mission Energy that expires in 2030 and (iv) access to up to 60 MWs of electricity generated at a wind farm near Blackwell, Oklahoma from a 20-year contract OG&E entered into with NextEra Energy that expires in 2032.
Safety and Health Regulation
OG&E is subject to a number of Federal and state laws and regulations, including OSHA, EPA and comparable state statutes, whose purpose is to protect the safety and health of workers.
In addition, the OSHA hazard communication standard, the EPA Emergency Planning and Community Right-to-Know regulations under Title III of the Federal Superfund Amendment and Reauthorization Act and comparable state statutes require that information be maintained concerning hazardous materials stored, used or produced in OG&E's operations and that this information be provided or made available to employees, state and local government authorities and citizens. OG&E believes that it is in material compliance with all applicable laws and regulations relating to worker safety and health.
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NATURAL GAS MIDSTREAM OPERATIONS - ENABLE MIDSTREAM PARTNERS
Overview
Enable is a large-scale, growth-oriented publicly traded Delaware limited partnership formed to own, operate and develop strategically located natural gas and crude oil infrastructure assets. Enable serves current and emerging production areas in the United States, including several, unconventional shale resource plays and local and regional end-user markets in the United States. Enable's assets and operations are organized into two reportable segments: (i) gathering and processing, which primarily provides natural gas gathering, processing and fractionation services and crude oil gathering for its producer customers, and interstate and intrastate natural gas pipeline transportation and storage service primarily to natural gas producers, utilities and industrial customers.
Enable's natural gas gathering and processing assets are located in four states and serve natural gas production from shale developments in the Anadarko, Arkoma and Ark-La-Tex basins. Enable also owns an emerging crude oil gathering business in North Dakota's Bakken Shale formation of the Williston Basin that commenced initial operations in November 2013. Enable's natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois.
Enable was formed on May 1, 2013, to own and operate the midstream businesses of OGE Energy and CenterPoint. As of December 31, 2014, Enable's portfolio of energy infrastructure assets included approximately 11,900 miles of gathering pipelines, 12 major processing plants with approximately 2.1 Bcf/d of processing capacity, approximately 7,900 miles of interstate pipelines (including SESH), approximately 2,300 miles of intrastate pipelines and eight storage facilities providing approximately 87.5 Bcf of storage capacity.
Enable's expansion capital expenditures are estimated to range from approximately $600 million to $800 million for the year ending December 31, 2015.
For the year ended December 31, 2014, approximately 72% of Enable's gross margin was generated from contracts that are fee-based, and approximately 50% of its gross margin was attributable to fees associated with firm contracts or contracts with minimum volume commitment features. Enable generated 88% of its transportation and storage gross margin under fee-based agreements as of December 31, 2014. The transportation and storage demand-based margin for this period represented 82% of the fee-based margin.
The following table shows the components of our gross margin for the year ended December 31, 2014.

| Fee-Based |  |  |  |  |
| Demand/Commitment/Guaranteed Return |  | Volume Dependent |  | Commodity-Based |  | Total |
Year Ended December 31, 2014 |  |  |  |  |  |  |  |
Gathering and Processing Segment | 26 | % |  | 33 | % |  | 41 | % |  | 100 | % |
Transportation and Storage Segment | 82 | % |  | 6 | % |  | 12 | % |  | 100 | % |
Partnership Weighted Average | 50 | % |  | 22 | % |  | 28 | % |  | 100 | % |

Gathering and Processing
Enable owns and operates approximately 11,900 miles of natural gas gathering pipelines in the Anadarko, Arkoma and Ark-La-Tex basins with approximately 853,000 horsepower of compression and 12 natural gas processing plants with approximately 2.1 Bcf/d of processing capacity and 2.1 Bcf/d of treating capacity as of December 31, 2014. Enable provides gathering, compression, treating, dehydration, processing and NGL fractionation for producers who are active in the areas in which it operates. For the year ended December 31, 2014, its assets gathered an average of approximately 3.34 TBtu/d of natural gas. For the year ended December 31, 2014, Enable processed approximately 1.56 TBtu/d of natural gas and produced approximately 66.74 MBbl/d of NGLs. Enable also has a crude oil gathering business in the Bakken Shale formation, principally located in the Williston Basin, that commenced initial operations in November 2013.
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As of December 31, 2014, Enable’s processing infrastructure consisted of 12 plants located in the Anadarko, Arkoma and Ark-La-Tex basins. The assets serving the Anadarko basin consist of nine processing plants, seven of which are interconnected through its super-header system, and are configured to facilitate the flow of natural gas from western Oklahoma and the Wheeler County area in the Texas Panhandle to the Cox City, Thomas, McClure, Calumet, Clinton, South Canadian and Wheeler processing plants. Enable is also currently constructing two cryogenic processing facilities that Enable plans to connect to its super-header system in Grady County, Oklahoma, which are expected to add 400 MMcf/d of natural gas processing capacity. The first of the two new plants (the Bradley Plant) is a 200 MMcf/d plant that is expected to be completed in the first quarter of 2015. The second plant (the Grady County Plant) is a 200 MMcf/d plant that is expected to be completed in the first quarter of 2016. Enable’s super-header system is intended to allow it to optimize the economics of our natural gas processing and to improve system utilization and reliability. The plant in the Arkoma basin serves the rich gas western portion of the area. The two plants in the Ark-La-Tex basin serve the Haynesville, Cotton Valley and Lower Bossier plays.
The following table sets forth certain information regarding Enable's gathering and processing assets as of or for the year ended December 31, 2014:

Asset/Basin | Length (miles) |  | Compression (Horsepower) |  | Average Gathering Volume (TBtu/d) |  | Number of Processing Plants |  | Processing Capacity (MMcf/d) |  | NGLs Produced (Bbl/d) |  | Gross Acreage Dedications (in millions)
Anadarko Basin | 7,345 |  | 558,636 |  | 1.38 |  | 9 |  | 1,445 |  | 51,561 |  | 4.3
Arkoma Basin | 2,893 |  | 139,620 |  | 0.77 |  | 1 |  | 60 |  | 4,408 |  | 1.4
Ark-La-Tex Basin(1) | 1,673 |  | 154,450 |  | 1.19 |  | 2 |  | 545 |  | 10,770 |  | 0.7
Total | 11,911 |  | 852,706 |  | 3.34 |  | 12 |  | 2,050 |  | 66,739 |  | 6.4

(1) | Ark-La-Tex basin assets also include 14,500 Bbl/d of fractionation capacity and 6,300 Bbl/d of ethane pipeline capacity, which are not listed in the table.

For the year ended December 31, 2014, Enable generated 59% of its gathering and processing gross margin from gathering and processing fees. The remaining 41% of gross margin for the year ended December 31, 2014 came from commodities, including natural gas, natural gas liquids, and condensate received under percent-of-proceeds, percent-of-liquids and keep-whole arrangements. For the year ended December 31, 2014, contracts generating 26% of gathering and processing gross margin had minimum volume commitments. Under a minimum volume commitment, a customer commits to ship a minimum volume of natural gas over a period of time on our gathering system, or, in lieu of shipping such volumes, to pay as if that minimum amount had been shipped.
As of December 31, 2014, Enable’s gathering agreements had acreage dedications with original terms ranging up to 15 years, which generally require that production by customers within the acreage dedication be delivered to Enable’s gathering system. As of December 31, 2014, Enable's natural gas gathering agreements had acreage dedications of 6.4 million gross acres with a volume-weighted average remaining term of approximately eight years. In addition, as of December 31, 2014, Enable had minimum volume commitments in lean natural gas developments of 1.5 Bcf/d with a weighted average remaining term of over six years. For the year ended December 31, 2014, Enable's top ten natural gas producer customers accounted for approximately 73% of its gathered volumes. Enable also owns a crude oil gathering business in the Bakken Shale formation of the Williston Basin that commenced initial operations in November 2013.
Transportation and Storage
Enable provides fee-based interstate and intrastate transportation and storage services across nine states. Enable owns and operates approximately 7,900 miles (including SESH) of interstate transportation pipelines with average firm contracted capacity of 7.73 Bcf/d (excluding SESH), for the year ended December 31, 2014. In addition, we own and operate approximately 2,300 miles of intrastate transportation pipelines with average aggregate throughput of 1.61 TBtu/d for the year ended December 31, 2014. Enable also owns and operates eight natural gas storage facilities in Oklahoma, Louisiana and Illinois with approximately 87.5 Bcf of aggregate storage capacity.
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The following table sets forth certain information regarding Enable's transportation and storage assets as of December 31, 2014:

Asset | Length (miles) |  | Capacity |  | Total Firm Contracted Capacity (Bcf/d) |  | Average Throughput Volume (Tbtu/d) |  | Percent of Capacity under Firm Contracts |  | Weighted Average Remaining Firm Contract Life (years)
Interstate Transportation(1) | 7,896 |  | 8.5 |  | BCF/d |  | 7.7 |  | 3.4 | (2) |  | 93% |  | 3.5
Intrastate Transportation | 2,286 |  | 1.9 |  | BCF/d(3) |  | — |  | 1.6 |  | —% |  | 4.5
Storage | — |  | 87.5 |  | BCF |  | 65.1 |  | — |  | 74% |  | 3.3

(1) | Except with respect to length, this information does not include amounts for SESH. SESH is a non-consolidated entity in which Enable own a 49.90% ownership interest.

(2) Actual volumes transported per day may be less than total firm contracted capacity based on demand.
(3) This represents the maximum single day receipts on the intrastate systems. Enable's Oklahoma intrastate pipeline system is a web-like configuration with multidirectional flow capabilities between numerous receipt and delivery points, which limits the ability to determine an overall system capacity. During the year ended December 31, 2014, the peak daily throughput was 1.9 TBtu or, on a volumetric basis, 1.9 Bcf/d.
ENVIRONMENTAL MATTERS
General
The activities of the Company are subject to numerous, stringent and complex Federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact OG&E's business activities in many ways including the handling or disposal of waste material, future construction activities to avoid or mitigate harm to threatened or endangered species and requiring the installation and operation of emissions pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. OG&E believes that its operations are in substantial compliance with current Federal, state and local environmental standards.
The trend in environmental regulation, however, is to place more restrictions and limitations on activities that may affect the environment. The Company cannot assure that future events, such as changes in existing laws, the promulgation of new laws or regulations, or the development or discovery of new facts or conditions will not cause it to incur significant costs. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market.
It is estimated that OG&E's total expenditures to comply with environmental laws, regulations and requirements for 2015 will be approximately $136.0 million, of which $116.0 million is for capital expenditures. It is estimated that OG&E's total expenditures to comply with environmental laws, regulations and requirements for 2016 will be approximately $159.0 million of which $139.0 million is for capital expenditures. The amounts for OG&E above include capital expenditures for low NOX burners, activated carbon injection and scrubbers. The Company's management believes that all of its operations are in substantial compliance with current Federal, state and local environmental standards. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market.
For a further discussion of environmental matters that may affect the Company, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations – Environmental Laws and Regulations."
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FINANCE AND CONSTRUCTION
Future Capital Requirements and Financing Activities
Capital Requirements
The Company's primary needs for capital are related to acquiring or constructing new facilities and replacing or expanding existing facilities at OG&E. Other working capital requirements are expected to be primarily related to maturing debt, operating lease obligations, fuel clause under and over recoveries and other general corporate purposes. The Company generally meets its cash needs through a combination of cash generated from operations, short-term borrowings (through a combination of bank borrowings and commercial paper) and permanent financings. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources" for a discussion of the Company's capital requirements.
Capital Expenditures
The Company's consolidated estimates of capital expenditures for the years 2015 through 2019 are shown in the following table. These capital expenditures represent the base maintenance capital expenditures (i.e., capital expenditures to maintain and operate the Company's businesses) plus capital expenditures for known and committed projects. Estimated capital expenditures for Enable are not included in the table below.

(In millions) | 2015 | 2016 | 2017 | 2018 | 2019
OG&E Base Transmission | $ | 40 |  | $ | 30 |  | $ | 30 |  | $ | 30 |  | $ | 30 |
OG&E Base Distribution | 175 |  | 175 |  | 175 |  | 175 |  | 175 |
OG&E Base Generation | 90 |  | 75 |  | 75 |  | 75 |  | 75 |
OG&E Other | 50 |  | 25 |  | 25 |  | 25 |  | 25 |
Total Base Transmission, Distribution, Generation and Other | 355 |  | 305 |  | 305 |  | 305 |  | 305 |
OG&E Known and Committed Projects: |  |  |  |  |
Transmission Projects: |  |  |  |  |
Regionally Allocated Base Projects (A) | 20 |  | 20 |  | 20 |  | 20 |  | 20 |
SPP Integrated Transmission Projects (B) (C) | 30 |  | 35 |  | 25 |  | 10 |  | 60 |
Total Transmission Projects | 50 |  | 55 |  | 45 |  | 30 |  | 80 |
Other Projects: |  |  |  |  |
Smart Grid Program | 10 |  | 10 |  | — |  | — |  | — |
Environmental - low NOX burners (D) | 35 |  | 20 |  | 10 |  | — |  | — |
Environmental - activated carbon injection (D) | 20 |  | — |  | — |  | — |  | — |
Environmental - natural gas conversion (D) | — |  | — |  | — |  | 40 |  | 35 |
Environmental - scrubbers (D) | 60 |  | 115 |  | 75 |  | 215 |  | 55 |
Combustion turbines - Environmental Compliance Plan | 15 |  | 45 |  | 175 |  | 165 |  | — |
Total Other Projects | 140 |  | 190 |  | 260 |  | 420 |  | 90 |
Total Known and Committed Projects | 190 |  | 245 |  | 305 |  | 450 |  | 170 |
Total | $ | 545 |  | $ | 550 |  | $ | 610 |  | $ | 755 |  | $ | 475 |

(A) | Approximately 30% of revenue requirement allocated to SPP members other than OG&E.

(B) | Approximately 85% of revenue requirement allocated to SPP members other than OG&E.

(C) | Project Type | Project Description | Estimated Cost (In millions) | Projected In-Service Date
| Integrated Transmission Project | 30 miles of transmission line from OG&E's Gracemont substation to an AEP companion transmission line to its Elk City substation | $45 | Early 2018
| Integrated Transmission Project | 126 miles of transmission line from OG&E's Woodward District Extra High Voltage substation to OG&E's Cimarron substation; construction of the Mathewson substation on this transmission line | $180 | Early 2021

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(D) | Represent capital costs associated with OG&E’s Environmental Compliance Plan to comply with the EPA’s MATS and Regional Haze rules. More detailed discussion regarding Regional Haze and OG&E’s Environmental Compliance Plan can be found in Note 15 of Notes to Financial Statements under "Environmental Compliance Plan" in Item 8 of Part II of this Form 10-K, and under “Environmental Laws and Regulations” within “Management's Discussion and Analysis of Financial Condition and Results of Operations” under Part II, Item 7 of this Form 10-K.

Additional capital expenditures beyond those identified in the table above, including additional incremental growth opportunities in electric transmission assets will be evaluated based upon their impact upon achieving the Company's financial objectives.
Pension and Postretirement Benefit Plans
During 2013, OGE Energy made contributions to its Pension Plan of $35 million, but did not make any contributions to its Pension Plan in 2014. OGE Energy has not yet determined whether it will need to make any contributions to the Pension Plan in 2015. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources - Future Capital Requirements and Financing Activities" for a discussion of OGE Energy's pension and postretirement benefit plans.
Common Stock Dividends
At the Company's September 2014 Board meeting, the Board of Directors approved management's recommendation of an 11 percent increase in the quarterly dividend rate to $0.25000 per share from $0.22500 per share effective in October 2014. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources - Future Capital Requirements and Financing Activities" for a further discussion.
Future Sources of Financing
Management expects that cash generated from operations, proceeds from the issuance of long and short-term debt, proceeds from the sales of common stock to the public through the Company's Automatic Dividend Reinvestment and Stock Purchase Plan or other offerings and distributions from Enable will be adequate over the next three years to meet anticipated cash needs and to fund future growth opportunities. The Company utilizes short-term borrowings (through a combination of bank borrowings and commercial paper) to satisfy temporary working capital needs and as an interim source of financing capital expenditures until permanent financing is arranged.
Short-Term Debt and Credit Facilities
Short-term borrowings generally are used to meet working capital requirements. The Company borrows on a short-term basis, as necessary, by the issuance of commercial paper and by borrowings under its revolving credit agreements. The Company has revolving credit facilities totaling in the aggregate $1,150.0 million. These bank facilities can also be used as letter of credit facilities. The short-term debt balance was $98.0 million and $439.6 million at December 31, 2014 and 2013, respectively. The weighted-average interest rate on short-term debt at December 31, 2014 was 0.41 percent. The average balance of short-term debt in 2014 was $417.8 million at a weighted-average interest rate of 0.30 percent. The maximum month-end balance of short-term debt in 2014 was $562.7 million. At December 31, 2014, the Company had $1,050.0 million of net available liquidity under its revolving credit agreements. OG&E has the necessary regulatory approvals to incur up to $800 million in short-term borrowings at any one time for a two-year period beginning January 1, 2015 and ending December 31, 2016. At December 31, 2014, the Company had $5.5 million in cash and cash equivalents. See Note 11 of Notes to Consolidated Financial Statements for a discussion of the Company's short-term debt activity.
In December 2011, the Company and OG&E entered into unsecured five-year revolving credit agreement s to total in the aggregate $1,150.0 million ($750.0 million for the Company and $400.0 million for OG&E). Each of the credit facilit ies contained an option, which could be exercised up to two times, to extend the term for an additional year. In the third quarter of 2013, the Company and OG&E utilized one of these one-year extensions, and received consent from all of the lenders, to extend the maturity of their credit agreement s from December 13, 2016 to December 13, 2017. In the second quarter of 2014, the Company and OG&E utilized their second extension to extend the maturity of their respective credit facility from December 13, 2017 to December 13, 2018. As of December 31, 2014, commitments of a single existing lender with respect to approximately $16.3 million and $8.7 million of the Company's and OG&E's credit facilities, respectively, however, were not extended and, unless the non-extending lender is replaced in accordance with the terms of the credit facility, such commitments will expire December 13, 2017.
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Issuance of Long-Term Debt
On March 25, 2014, OG&E completed the issuance of $250 million of 4.55 percent senior notes due March 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
On November 19, 2014, the Company completed the issuance of $100 million in aggregate principal of its Floating Rate Senior Notes, Series due November 24, 2017. The proceeds from the issuance were used to refinance its $100 million of 5.00 percent Senior Notes due November 15, 2014.
On December 11, 2014, OG&E completed the issuance of $250 million of 4.00 percent Senior Notes, Series due December 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay short-term debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
Redemption of Long-Term Debt
On August 1, 2014, OG&E redeemed all $140 million principal amount outstanding of its 6.50 percent senior notes due August 1, 2034 at 103.25 percent of their principal amount, plus accrued interest. The redemption premium of $4.6 million was deferred and will be amortized through March 2044 to match the expected regulatory treatment.
Common Stock
The Company expects to issue between $10 million and $15 million of common stock in its Automatic Dividend Reinvestment and Stock Purchase Plan in 2015. See Note 9 of Notes to Consolidated Financial Statements for a discussion of the Company's common stock activity.
Distributions by Enable
Pursuant to the Enable limited partnership agreement, during 2014 Enable made distributions of $143.7 million to the Company.
EMPLOYEES
The Company had 3,329 employees at December 31, 2014. Included in this total are 884 employees that are seconded to Enable. In October 2014, CenterPoint, OGE Energy and Enable agreed to continue the secondment to Enable of 192 OGE Energy employees that participate in OGE Energy's defined benefit and retirement plans beyond December 31, 2014. The remaining OGE Energy seconded employees were terminated from OGE Energy on December 31, 2014 and were offered employment by Enable.
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EXECUTIVE OFFICERS
The following persons were Executive Officers of the Registrant as of February 26, 2015:

Name | Age | Title
Peter B. Delaney | 61 | Chairman of the Board and Chief Executive Officer - OGE Energy Corp.
Sean Trauschke | 47 | President - OGE Energy Corp.
E. Keith Mitchell | 52 | Chief Operating Officer - OG&E
Stephen E. Merrill | 50 | Chief Financial Officer - OGE Energy Corp.
William J. Bullard | 66 | Assistant General Counsel - OGE Energy Corp.
Scott Forbes | 57 | Controller and Chief Accounting Officer - OGE Energy Corp.
Patricia D. Horn | 56 | Vice President - Governance and Corporate Secretary - OGE Energy Corp.
Jesse B. Langston | 52 | Vice President - Retail Energy - OG&E
Jean C. Leger, Jr. | 56 | Vice President - Utility Operations - OG&E
Cristina F. McQuistion | 50 | Vice President - Strategic Planning, Performance Improvement and Chief Information Officer - OG&E
Jerry A. Peace | 52 | Chief Generation Planning and Procurement Officer - OG&E
Paul L. Renfrow | 58 | Vice President - Public Affairs and Corporate Administration - OGE Energy Corp.
Charles B. Walworth | 40 | Treasurer - OGE Energy Corp.

No family relationship exists between any of the Executive Officers of the Registrant. Messrs. Delaney, Merrill, Trauschke, Bullard, Forbes, Renfrow, Walworth and Ms. Horn are also officers of OG&E. Each Executive Officer is to hold office until the Board of Directors meeting following the next Annual Meeting of Shareowners, currently scheduled for May 14, 2015.
Messrs. Delaney and Trauschke are members of the Board of Directors of Enable GP, LLC, the general partner of Enable.
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The business experience of each of the Executive Officers of the Registrant for the past five years is as follows:

Name | Business Experience
Peter B. Delaney | 2014 - Present: | Chairman of the Board and Chief Executive Officer of OGE Energy Corp.
| 2012 - 2014: | Chairman of the Board, President and Chief Executive Officer of OGE Energy Corp.
| 2010 - 2011: | Chairman of the Board and Chief Executive Officer of OGE Energy Corp.
Sean Trauschke | 2014 - Present: | President of OGE Energy Corp.
| 2014: | Chief Financial Officer of OGE Energy Corp.
| 2010 - 2014: | Vice President and Chief Financial Officer of OGE Energy Corp.
E. Keith Mitchell | 2015 - Present | Chief Operating Officer of OG&E
| 2013 - 2015: | Chief Operating Officer of Enable GP, LLC
| 2011 - 2013: | President and Chief Operating Officer of Enogex Holdings; President of Enogex LLC
| 2010 - 2011: | Senior Vice President and Chief Operating Officer of Enogex LLC
Stephen E. Merrill | 2014 - Present: | Chief Financial Officer of OGE Energy Corp.
| 2013 - 2014: | Executive Vice President of Finance and Chief Administrative Officer of Enable GP LLC
| 2011 - 2013: | Chief Operating Officer of Enogex LLC
| 2010 - 2011: | Vice President - Human Resources of OGE Energy Corp.
William J. Bullard | 2010 - Present: | Assistant General Counsel of OGE Energy Corp.
Scott Forbes | 2010 - Present: | Controller and Chief Accounting Officer of OGE Energy Corp.
Patricia D. Horn | 2014 - Present: | Vice President - Governance and Corporate Secretary of OGE Energy Corp.
| 2012 - 2014: | Vice President - Governance, Environmental and Corporate Secretary of OGE Energy Corp.
| 2010 - 2012: | Vice President - Governance, Environmental, Health & Safety; Corporate Secretary of OGE Energy Corp.
Jesse B. Langston | 2010 - Present: | Vice President - Retail Energy of OG&E
Jean C. Leger, Jr. | 2010 - Present: | Vice President - Utility Operations of OG&E
Cristina F. McQuistion | 2014 - Present: | Vice President - Strategic Planning, Performance Improvement and Chief Information Officer of OG&E
| 2013 - 2014: | Vice President - Strategic Planning, Performance Improvement and Chief Information Officer of OGE Energy Corp. and OG&E
| 2011 - 2013: | Vice President - Strategy and Performance Improvement of OGE Energy Corp. and OG&E
| 2010 - 2011: | Vice President - Process and Performance Improvement of OGE Energy Corp. and OG&E
Jerry A. Peace | 2014 - Present: | Chief Generation Planning and Procurement Officer of OG&E
| 2010 - 2014: | Chief Risk Officer of OGE Energy Corp.
Paul L. Renfrow | 2014 - Present: | Vice President - Public Affairs and Corporate Administration of OGE Energy Corp.
| 2014: | Vice President - Public Affairs, HR, HS&E and Regulatory of OGE Energy Corp.
| 2012 - 2014: | Vice President - Public Affairs, Human Resources and Health & Safety of OGE Energy Corp.
| 2011 - 2012: | Vice President - Public Affairs and Human Resources of OGE Energy Corp.
| 2010 - 2011: | Vice President - Public Affairs of OGE Energy Corp.
Charles B. Walworth | 2014 - Present: | Treasurer of OGE Energy Corp
| 2012 - 2014: | Assistant Treasurer of OGE Energy Corp.
| 2010 - 2012: | Senior Manager Finance of OGE Energy Corp.
| 2010: | Manager Corporate Finance of OGE Energy Corp.

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ACCESS TO SECURITIES AND EXCHANGE COMMISSION FILINGS
The Company's web site address is www.oge.com. Through the Company's website under the heading "Corporate," "Investor Relations," "SEC Filings," the Company makes available, free of charge, its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and all amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as soon as reasonably practicable after such material is electronically filed with or furnished to the Securities and Exchange Commission. Our Internet website and the information contained therein or connected thereto are not intended to be incorporated into this Form 10-K and should not be considered a part of this Form 10-K.
Item 1A. Risk Factors.
In the discussion of risk factors set forth below, unless the context otherwise requires, the terms "we," "our" and "us" refer to the Company. In addition to the other information in this Form 10-K and other documents filed by us and/or our subsidiaries with the Securities and Exchange Commission from time to time, the following factors should be carefully considered in evaluating OGE Energy and its subsidiaries. Such factors could affect actual results and cause results to differ materially from those expressed in any forward-looking statements made by or on behalf of us or our subsidiaries. Additional risks and uncertainties not currently known to us or that we currently view as immaterial may also impair our business operations.
REGULATORY RISKS
OG&E's profitability depends to a large extent on the ability to fully recover its costs from its customers and there may be changes in the regulatory environment that impair its ability to recover costs from its customers.
OG&E is subject to comprehensive regulation by several Federal and state utility regulatory agencies, which significantly influences its operating environment and its ability to fully recover its costs from utility customers. Recoverability of any under recovered amounts from OG&E's customers due to a rise in fuel costs is a significant risk. The utility commissions in the states where OG&E operates regulate many aspects of its utility operations including siting and construction of facilities, customer service and the rates that OG&E can charge customers. The profitability of the utility operations is dependent on OG&E's ability to fully recover costs related to providing energy and utility services to its customers.
In recent years, the regulatory environments in which OG&E operates have received an increased amount of attention. It is possible that there could be changes in the regulatory environment that would impair OG&E's ability to fully recover costs historically paid by OG&E's customers. State utility commissions generally possess broad powers to ensure that the needs of the utility customers are being met. OG&E cannot assure that the OCC, APSC and the FERC will grant rate increases in the future or in the amounts requested, and they could instead lower OG&E's rates.
OG&E is unable to predict the impact on its operating results from the future regulatory activities of any of the agencies that regulate OG&E. Changes in regulations or the imposition of additional regulations could have an adverse impact on OG&E's results of operations.
OG&E's rates are subject to rate regulation by the states of Oklahoma and Arkansas, as well as by a Federal agency, whose regulatory paradigms and goals may not be consistent.
OG&E is currently a vertically integrated electric utility. Most of its revenue results from the sale of electricity to retail customers subject to bundled rates that are approved by the applicable state utility commission and from the sale of electricity to wholesale customers subject to rates and other matters approved by the FERC.
OG&E operates in Oklahoma and western Arkansas and is subject to rate regulation by the OCC and the APSC, in addition to the FERC. Exposure to inconsistent state and Federal regulatory standards may limit our ability to operate profitably. Further alteration of the regulatory landscape in which we operate, including a change in our return on equity, may harm our financial position and results of operations.
Costs of compliance with environmental laws and regulations are significant and the cost of compliance with future environmental laws and regulations may adversely affect our results of operations, consolidated financial position, or liquidity.
We are subject to extensive Federal, state and local environmental statutes, rules and regulations relating to air quality, water quality, waste management, wildlife conservation, natural resources and health and safety that could, among other things, restrict or limit the output of certain facilities or the use of certain fuels required for the production of electricity and/or require
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additional pollution control equipment and otherwise increase costs. There are significant capital, operating and other costs associated with compliance with these environmental statutes, rules and regulations and those costs may be even more significant in the future. As discussed in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Environmental Laws and Regulations". As discussed in "Pending Regulatory Matters", OG&E is required to comply with the EPA's FIP by January 4, 2019 and has in response to this requirement, filed an application with the OCC for approval of its plan to comply with the EPA's MATS and Regional Haze FIP.
In response to recent regulatory and judicial decisions, emissions of greenhouse gases including, most significantly, carbon dioxide could be restricted in the future as a result of Federal or state legal requirements or litigation relating to greenhouse gas emissions. If mandatory reductions of carbon dioxide and other greenhouse gases are required in the future, this could result in significant additional compliance costs that would affect our future consolidated financial position, results of operations and cash flows if such costs are not recovered through regulated rates. The EPA has started a process to implement carbon dioxide emission limitations for existing electric generating units, and neither the outcome of the rule making process nor the timing of any required expenditures resulting from the EPA rule making process can be predicted with any certainty at this time.
There is inherent risk of the incurrence of environmental costs and liabilities in our operations and historical industry operations practices. These activities are subject to stringent and complex Federal, state and local laws and regulations that can restrict or impact OG&E's business activities in many ways, such as restricting the way it can handle or dispose of their wastes or requiring remedial action to mitigate pollution conditions that may be caused by their operations or that are attributable to former operators. OG&E may be unable to recover these costs from insurance. Moreover, the possibility exists that stricter laws, regulations or enforcement policies could significantly increase compliance costs and the cost of any remediation that may become necessary.
For a further discussion of environmental matters that may affect the Company, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations – Environmental Laws and Regulations."
We may not be able to recover the costs of our substantial planned investment in capital improvements and additions.
OG&E's business plan calls for extensive investment in capital improvements and additions, including the installation of environmental upgrades and retrofits and modernizing existing infrastructure as well as other initiatives. Significant portions of OG&E's facilities were constructed many years ago. Older generation equipment, even if maintained in accordance with good engineering practices, may require significant capital expenditures to maintain efficiency, to comply with changing environmental requirements or to provide reliable operations. OG&E currently provides service at rates approved by one or more regulatory commissions. If these regulatory commissions do not approve adjustments to the rates OG&E charges, it would not be able to recover the costs associated with its planned extensive investment. This could adversely affect OG&E's financial position and results of operations. While OG&E may seek to limit the impact of any denied recovery by attempting to reduce the scope of its capital investment, there can no assurance as to the effectiveness of any such mitigation efforts, particularly with respect to previously incurred costs and commitments.
Our jurisdictions have fuel clauses that permit us to recover fuel costs through rates without a general rate case. While prudent capital investment and variable fuel costs each generally warrant recovery, in practical terms our regulators could limit the amount or timing of increased costs that we would recover through higher rates. Any such limitation could adversely affect our results of operations and financial position.
The regional power market in which OG&E operates has changing transmission regulatory structures, which may affect the transmission assets and related revenues and expenses.
OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority (but not ownership) of OG&E's transmission facilities to the SPP. On March 1, 2014, the SPP implemented and the FERC approved regional day ahead and real-time markets for energy and operating reserves, as well as associated transmission congestion rights. Collectively the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets and customer load in the SPP Integrated Marketplace for the sole benefit of its’ customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records SPP Integrated Marketplace transactions as sales or purchases with results reported as Operating Revenues or Cost of Goods Sold in its Consolidated Financial Statements. OG&E's revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operation and regulation of the SPP Integrated Marketplace by the FERC or the SPP.
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Increased competition resulting from restructuring efforts could have a significant financial impact on us and OG&E and consequently decrease our revenue.
We have been and will continue to be affected by competitive changes to the utility and energy industries. Significant changes already have occurred and additional changes have been proposed to the wholesale electric market. Although retail restructuring efforts in Oklahoma and Arkansas have been postponed for the time being, if such efforts were renewed, retail competition and the unbundling of regulated energy service could have a significant financial impact on us due to possible impairments of assets, a loss of retail customers, lower profit margins and/or increased costs of capital. Any such restructuring could have a significant impact on our consolidated financial position, results of operations and cash flows. We cannot predict when we will be subject to changes in legislation or regulation, nor can we predict the impact of these changes on our consolidated financial position, results of operations or cash flows.
Events that are beyond our control have increased the level of public and regulatory scrutiny of our industry. Governmental and market reactions to these events may have negative impacts on our business, consolidated financial position, results of operations, cash flows and access to capital.
As a result of accounting irregularities at public companies in general, and energy companies in particular, and investigations by governmental authorities into energy trading activities, public companies, including those in the regulated and unregulated utility business, have been under public and regulatory scrutiny and suspicion. The accounting irregularities have caused regulators and legislators to review current accounting practices, financial disclosures and relationships between companies and their independent auditors. The capital markets and rating agencies also have increased their level of scrutiny. We believe that we are complying with all applicable laws and accounting standards, but it is difficult or impossible to predict or control what effect these types of events may have on our business, consolidated financial position, cash flows or access to the capital markets. It is unclear what additional laws or regulations may develop, and we cannot predict the ultimate impact of any future changes in accounting regulations or practices in general with respect to public companies, the energy industry or our operations specifically. Any new accounting standards could affect the way we are required to record revenues, expenses, assets, liabilities and equity. These changes in accounting standards could lead to negative impacts on reported earnings or decreases in assets or increases in liabilities that could, in turn, affect our results of operations and cash flows.
We are subject to substantial utility and energy regulation by governmental agencies. Compliance with current and future utility and energy regulatory requirements and procurement of necessary approvals, permits and certifications may result in significant costs to us.
We are subject to substantial regulation from Federal, state and local regulatory agencies. We are required to comply with numerous laws and regulations and to obtain permits, approvals and certificates from the governmental agencies that regulate various aspects of our businesses, including customer rates, service regulations, retail service territories, sales of securities, asset acquisitions and sales, accounting policies and practices and the operation of generating facilities. We believe the necessary permits, approvals and certificates have been obtained for our existing operations and that our business is conducted in accordance with applicable laws; however, we are unable to predict the impact on our operating results from future regulatory activities of these agencies.
In compliance with the Energy Policy Act of 2005, the FERC approved the North American Electric Reliability Corporation as the national energy reliability organization. The North American Electric Reliability Corporation is responsible for the development and enforcement of mandatory reliability and cyber security standards for the wholesale electric power system. OG&E's plan is to comply with all applicable standards and to expediently correct a violation should it occur. The North American Electric Reliability Corporation has authority to assess penalties up to $1.0 million per day per violation for noncompliance. In order to comply with new or updated security regulations, we may be required to make changes to our current operations which could also result in additional expenses. OG&E is subject to a North American Electric Reliability Corporation compliance audit every three years as well as periodic spot check audits and cannot predict the outcome of those audits.
OPERATIONAL RISKS
Our results of operations may be impacted by disruptions beyond our control.
We are exposed to risks related to performance of contractual obligations by our suppliers. We are dependent on coal and natural gas for much of our electric generating capacity. We rely on suppliers to deliver coal and natural gas in accordance with short and long-term contracts. We have certain supply contracts in place; however, there can be no assurance that the counterparties to these agreements will fulfill their obligations to supply coal and natural gas to us. The suppliers under these agreements may experience financial or technical problems that inhibit their ability to fulfill their obligations to us. In addition,
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the suppliers under these agreements may not be required to supply coal and natural gas to us under certain circumstances, such as in the event of a natural disaster. Deliveries may be subject to short-term interruptions or reductions due to various factors, including transportation problems, weather and availability of equipment. Failure or delay by our suppliers of coal and natural gas deliveries could disrupt our ability to deliver electricity and require us to incur additional expenses to meet the needs of our customers.
Also, because our generation and transmission systems are part of an interconnected regional grid, we face the risk of possible loss of business due to a disruption or black-out caused by an event (severe storm, generator or transmission facility outage) on a neighboring system or the actions of a neighboring utility. Any such disruption could result in a significant decrease in revenues and significant additional costs to repair assets, which could have a material adverse impact on our consolidated financial position, results of operations and cash flows.
OG&E's electric generating facilities are subject to operational risks that could result in unscheduled plant outages, unanticipated operation and maintenance expenses and increased purchase power costs.
OG&E owns and operates coal-fired, natural gas-fired and wind-powered generating facilities. Operation of electric generating facilities involves risks that can adversely affect energy output and efficiency levels. Included among these risks are:

• | increased prices for fuel and fuel transportation as existing contracts expire;

• | facility shutdowns due to a breakdown or failure of equipment or processes or interruptions in fuel supply;

• | operator error or safety related stoppages;

• | disruptions in the delivery of electricity; and

• | catastrophic events such as fires, explosions, tornadoes, floods, earthquakes or other similar occurrences.

Changes in technology and regulatory policies may cause our generating facilities to be less competitive.
OG&E primarily generates electricity at large central facilities. This method typically results in economies of scale and lower costs than newer technologies such as fuel cells, microturbines, windmills and photovoltaic solar cells. It is possible that advances in technologies or changes in regulatory policies will reduce costs of new technology to levels that are equal to or below that of most central station electricity production, which could have a material adverse effect on our results of operations.
Economic conditions could negatively impact our business and our results of operations.
Our operations are affected by local, national and worldwide economic conditions. The consequences of a prolonged recession could include a lower level of economic activity and uncertainty regarding energy prices and the capital and commodity markets. A lower level of economic activity could result in a decline in energy consumption, which could adversely affect our revenues and future growth. Instability in the financial markets, as a result of recession or otherwise, also could affect the cost of capital and our ability to raise capital. Economic conditions may also impact the valuation of certain long-lived assets, including our investment in unconsolidated affiliates, that are subject to impairment testing, potentially resulting in impairment charges, which could have a material adverse impact on our results of operations.
Current economic conditions may be exacerbated by insufficient financial sector liquidity leading to potential increased unemployment, which could impact the ability of our customers to pay timely, increase customer bankruptcies, and could lead to increased bad debt. If such circumstances occur, we expect that commercial and industrial customers would be impacted first, with residential customers following.
In addition, economic conditions, particularly budget shortfalls, could lead to increased pressure on Federal, state and local governments to raise additional funds, including through increased corporate taxes and/or through delaying, reducing or eliminating tax credits, grants or other incentives, which could have a material adverse impact on our results of operations and cash flows.
We are subject to financial risks associated with climate change.
Climate change creates financial risk. Potential regulation associated with climate change legislation could pose financial risks to the Company. In addition, to the extent that any climate change adversely affects the national or regional economic health through increased rates caused by the inclusion of additional regulatory imposed costs (carbon dioxide taxes or costs associated with additional regulatory requirements), the Company may be adversely impacted. A declining economy could adversely impact the overall financial health of the Company because of lack of load growth and decreased sales opportunities. To the extent financial markets view climate change and emissions of greenhouse gases as a financial risk, this could negatively affect our ability to access capital markets or cause us to receive less than ideal terms and conditions.
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We are subject to cyber security risks and increased reliance on processes automated by technology.
In the regular course of our businesses, we handle a range of sensitive security and customer information. We are subject to laws and rules issued by different agencies concerning safeguarding and maintaining the confidentiality of this information. A security breach of our information systems such as theft or inappropriate release of certain types of information, including confidential customer information or system operating information, could have a material adverse impact on our consolidated financial position, results of operations and cash flows.
OG&E operates in a highly regulated industry that requires the continued operation of sophisticated information technology systems and network infrastructure. Despite implementation of security measures, the technology systems are vulnerable to disability, failures or unauthorized access. Such failures or breaches of the systems could impact the reliability of OG&E's generation, transmission and distribution systems (including smart grid) which may result in a loss of service to customers and also subject OG&E to financial harm due to the significant expense to repair security breaches or system damage. The implementation of OG&E's smart grid program further increases potential risks associated with cyber security attacks. If the technology systems were to fail or be breached and not recovered in a timely way, critical business functions could be impaired and sensitive confidential data could be compromised, which could have a material adverse impact on its consolidated financial position, results of operations and cash flows.
Our security procedures, which include among others, virus protection software, cyber security and our business continuity planning, including disaster recovery policies and back-up systems, may not be adequate or implemented properly to fully address the adverse affect of cyber security attacks on our systems, which could adversely impact our operations.
Terrorist attacks, and the threat of terrorist attacks, have resulted in increased costs to our business. Continued hostilities in the Middle East or other sustained military campaigns may adversely impact our consolidated financial position, results of operations and cash flows.
The long-term impact of terrorist attacks and the magnitude of the threat of future terrorist attacks on the electric utility and natural gas midstream industry in general, and on us in particular, cannot be known. Increased security measures taken by us as a precaution against possible terrorist attacks have resulted in increased costs to our business. Uncertainty surrounding continued hostilities in the Middle East or other sustained military campaigns may affect our operations in unpredictable ways, including disruptions of supplies and markets for our products, and the possibility that our infrastructure facilities could be direct targets of, or indirect casualties of, an act of terror. Changes in the insurance markets attributable to terrorist attacks may make certain types of insurance more difficult for us to obtain. Moreover, the insurance that may be available to us may be significantly more expensive than existing insurance coverage.
Weather conditions such as tornadoes, thunderstorms, ice storms, wind storms, and prolonged droughts, as well as seasonal temperature variations may adversely affect our consolidated financial position, results of operations and cash flows.
Weather conditions directly influence the demand for electric power. In OG&E's service area, demand for power peaks during the hot summer months, with market prices also typically peaking at that time. As a result, overall operating results may fluctuate on a seasonal and quarterly basis. In addition, we have historically sold less power, and consequently received less revenue, when weather conditions are milder. Unusually mild weather in the future could reduce our revenues, net income, available cash and borrowing ability. Severe weather, such as tornadoes, thunderstorms, ice storms and wind storms, may cause outages and property damage which may require us to incur additional costs that are generally not insured and that may not be recoverable from customers. The effect of the failure of our facilities to operate as planned, as described above, would be particularly burdensome during a peak demand period. In addition, prolonged droughts could cause a lack of sufficient water for use in cooling during the electricity generating process.
FINANCIAL RISKS
Market performance, increased retirements, changes in retirement plan regulations and increasing costs associated with our Pension Plan, health care plans and other employee-related benefits may adversely affect our consolidated financial position, results of operations or cash flow.
We have a Pension Plan that covers a significant amount of our employees hired before December 1, 2009. We also have defined benefit postretirement plans that cover a significant amount of our employees hired prior to February 1, 2000. Assumptions related to future costs, returns on investments, interest rates and other actuarial assumptions with respect to the defined benefit retirement and postretirement plans have a significant impact on our results of operations and funding requirements. Based on
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our assumptions at December 31, 2014, we expect to continue to make future contributions to maintain required funding levels. At times, it has been our practice to also make voluntary contributions to maintain more prudent funding levels than minimally required. We may continue to make voluntary contributions in the future. These amounts are estimates and may change based on actual stock market performance, changes in interest rates and any changes in governmental regulations.
If the employees who participate in the Pension Plan retire when they become eligible for retirement over the next several years, or if our plan experiences adverse market returns on its investments, or if interest rates materially fall, our pension expense and contributions to the plans could rise substantially over historical levels. The timing and number of employees retiring and selecting the lump-sum payment option could result in pension settlement charges that could materially affect our results of operations if we are unable to recover these costs through our electric rates. In addition, assumptions related to future costs, returns on investments, interest rates and other actuarial assumptions, including projected retirements, have a significant impact on our consolidated financial position and results of operations. Those factors are outside of our control.
In addition to the costs of our Pension Plan, the costs of providing health care benefits to our employees and retirees have increased substantially in recent years. We believe that our employee benefit costs, including costs related to health care plans for our employees, will continue to rise. The increasing costs and funding requirements with our Pension Plan, health care plans and other employee benefits may adversely affect our consolidated financial position, results of operations or liquidity.
We face certain human resource risks associated with the availability of trained and qualified labor to meet our future staffing requirements.
Workforce demographic issues challenge employers nationwide and are of particular concern to the electric utility industry. The median age of utility workers is significantly higher than the national average. Over the next three years, 25 percent of our current employees will be eligible to retire with full pension benefits. Failure to hire and adequately train replacement employees, including the transfer of significant internal historical knowledge and expertise to the new employees, may adversely affect our ability to manage and operate our business.
We are a holding company with our primary assets being investments in our subsidiary and equity investments.
We are a holding company and thus our investments in our subsidiary and unconsolidated affiliate, accounted for under the equity method, are our primary assets. Substantially all of our operations are conducted by our subsidiary and unconsolidated affiliate. Consequently, our operating cash flow and our ability to pay our dividends and service our indebtedness depends upon the operating cash flow of our subsidiary and unconsolidated affiliate and the payment of funds by them to us in the form of dividends or distributions. At December 31, 2014, the Company and its subsidiary had outstanding indebtedness and other liabilities of $6.3 billion. Our subsidiary and unconsolidated affiliate are separate legal entities that have no obligation to pay any amounts due on our indebtedness or to make any funds available for that purpose, whether by dividends or otherwise. In addition, their ability to pay dividends to us depends on any statutory and contractual restrictions that may be applicable to such subsidiary, which may include requirements to maintain minimum levels of working capital and other assets. Claims of creditors, including general creditors, of our subsidiary or unconsolidated affiliate on their respective assets will generally have priority over our claims (except to the extent that we may be a creditor of the subsidiaries and our claims are recognized) and claims by our shareowners.
In addition, as discussed above, OG&E is regulated by state utility commissions in Oklahoma and Arkansas as well as a Federal regulatory agency which generally possess broad powers to ensure that the needs of the utility customers are being met. To the extent that the state commissions or Federal regulatory agency attempt to impose restrictions on the ability of OG&E to pay dividends to us, it could adversely affect our ability to continue to pay dividends.
Certain provisions in our charter documents have anti-takeover effects.
Certain provisions of our certificate of incorporation and bylaws, as well as the Oklahoma corporations statute, may have the effect of delaying, deferring or preventing a change in control of the Company. Such provisions, including those regulating the nomination of directors, limiting who may call special stockholders' meetings and eliminating stockholder action by written consent, together with the possible issuance of preferred stock of the Company without stockholder approval, may make it more difficult for other persons, without the approval of our board of directors, to make a tender offer or otherwise acquire substantial amounts of our common stock or to launch other takeover attempts that a stockholder might consider to be in such stockholder's best interest.
We and OG&E may be able to incur substantially more indebtedness, which may increase the risks created by our indebtedness.
The terms of the indentures governing our debt securities do not fully prohibit us or our subsidiaries from incurring additional indebtedness. If we or OG&E are in compliance with the financial covenants set forth in our revolving credit agreement s
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and the indentures governing our debt securities, we and OG&E may be able to incur substantial additional indebtedness. If we or OG&E incur additional indebtedness, the related risks that we and they now face may intensify.
Any reductions in our credit ratings could increase our financing costs and the cost of maintaining certain contractual relationships or limit our ability to obtain financing on favorable terms.
We cannot assure you that any of our current credit ratings or the ratings of our subsidiaries' will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a rating agency if, in its judgment, circumstances so warrant. Our ability to access the commercial paper market could be adversely impacted by a credit ratings downgrade or major market disruptions. Pricing grids associated with our credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of our short-term borrowings, but a reduction in our credit rating s would not result in any defaults or accelerations. Any future downgrade could also lead to higher long-term borrowing costs and, if below investment grade, would require us to post collateral or letters of credit.
Our debt levels may limit our flexibility in obtaining additional financing and in pursuing other business opportunities.
We have revolving credit agreement s for working capital, capital expenditures, including acquisitions, and other corporate purposes. The levels of our debt could have important consequences, including the following:

• | the ability to obtain additional financing, if necessary, for working capital, capital expenditures, acquisitions or other purposes may be impaired or the financing may not be available on favorable terms;

• | a portion of cash flows will be required to make interest payments on the debt, reducing the funds that would otherwise be available for operations and future business opportunities; and

• | our debt levels may limit our flexibility in responding to changing business and economic conditions.

We are exposed to the credit risk of our key customers and counterparties, and any material nonpayment or nonperformance by our key customers and counterparties could adversely affect our consolidated financial position, results of operations and cash flows.
We are exposed to credit risks in our generation, retail distribution and pipeline operations. Credit risk includes the risk that counterparties that owe us money or energy will breach their obligations. If the counterparties to these arrangements fail to perform, we may be forced to enter into alternative arrangements. In that event, our financial results could be adversely affected and we could incur losses.
RISKS ASSOCIATED WITH OUR INVESTMENT IN ENABLE MIDSTREAM PARTNERS
OGE Energy does not control Enable and therefore is not able to cause or prevent certain actions by Enable.
Enable has its own governing board, and OGE Energy does not control all of the decisions of that board. Consequently, OGE Energy will be unable solely to cause Enable to take actions that OGE Energy believes would be in our or Enable's best interests. Likewise, OGE Energy will be unable to prevent certain actions of Enable.
A significant portion of our earnings and operating cash flows depend on the performance of Enable. If any of the following risks were actually to occur, our business, financial condition, results of operations or cash flows could be materially adversely affected.
Our operating cash flow is derived partially from cash distributions we receive from Enable.
Our operating cash flow is derived partially from cash distributions we receive from Enable. The amount of cash it can distribute principally depends upon the amount of cash flow it generates from its operations, which may fluctuate from quarter to quarter based on, among other things.

• | the fees and gross margins realized with respect to the volume of natural gas and crude oil handled;

• | the prices of, levels of production of, and demand for natural gas and crude oil;

• | the volume of natural gas and crude oil gathered, compressed, treated, dehydrated, processed, fractionated, transported and stored;

• | the relationship among prices for natural gas, NGLs and crude oil;

• | cash calls and settlements of hedging positions;

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• | margin requirements on open price risk management assets and liabilities;

• | the level of competition from other midstream energy companies;

• | adverse effects of governmental and environmental regulation;

• | the level of operation and maintenance expenses and general and administrative costs; and

• | prevailing economic conditions.

In addition, the actual amount of cash available for distribution will depend on other factors, including:

• | the level and timing of capital expenditures;

• | the cost of acquisitions;

• | debt service requirements and other liabilities;

• | fluctuations in working capital needs;

• | ability to borrow funds and access capital markets;

• | restrictions contained in debt agreements;

• | the amount of cash reserves established by Enable GP, LLC

• | other business risks affecting its cash levels.

Enable's contracts are subject to renewal risk
Enable generates a substantial portion of its gross margins under long-term, fee-based agreements. For the year ended December 31, 2014, approximately 72% of its gross margin was generated from contracts that are fee-based and approximately 50% of its gross margin was attributable to fees associated with firm contracts or contracts with minimum volume commitment features. As these and other contracts expire, Enable may have to negotiate extensions or renewals with existing suppliers and customers or enter into new contracts with other suppliers and customers. Enable may be unable to obtain new contracts on favorable commercial terms, if at all, and also may be unable to maintain the economic structure of a particular contract with an existing customer or the overall mix of its contract portfolio. For example, depending on prevailing market conditions at the time of a contract renewal, gathering and processing customers with fixed-fee or fixed-margin contracts may desire to enter into contracts under different fee arrangements. To the extent Enable is unable to renew its existing contracts on terms that are favorable to Enable, if at all, or successfully manage its overall contract mix over time, its revenue, results of operations and distributable cash flow could be adversely affected.
Enable depends on a small number of customers for a significant portion of its firm transportation and storage services revenues. The loss of, or reduction in volumes from, these customers could result in a decline in sales of its transportation and storage services and its consolidated financial position, results of operations and its ability to make cash distributions to us.
Enable provides firm transportation and storage services to certain key customers on its system. Enable's major transportation customers are affiliates of CenterPoint Energy, Laclede Group, American Electric Power Company, Inc., XTO Energy, Inc. and OGE Energy.
The loss of all or even a portion of the interstate or intrastate transportation and storage services for any of these customers, the failure to extend or replace these contracts or the extension or replacement of these contracts on less favorable terms, as a result of competition or otherwise, could adversely affect Enable's combined and consolidated financial position, results of operations and its ability to make cash distributions to OGE Energy.
The businesses of Enable are dependent, in part, on the drilling and production decisions of others.
The businesses of Enable are dependent on the continued availability of natural gas and crude oil production. Enable has no control over the level of drilling activity in its areas of operation, the amount of reserves associated with wells connected to its systems or the rate at which production from a well declines. In addition, its cash flows associated with wells currently connected to its systems will decline over time. To maintain or increase throughput levels on its gathering and transportation systems and the asset utilization rates at its natural gas processing plants, its customers must continually obtain new natural gas and crude oil supplies. The primary factors affecting its ability to obtain new supplies of natural gas and crude oil and attract new customers to its assets are the level of successful drilling activity near these systems, its ability to compete for volumes from successful new wells and its ability to expand capacity as needed. If Enable is not able to obtain new supplies of natural gas and crude oil to replace the natural decline in volumes from existing wells, throughput on its gathering, processing, transportation and storage facilities would decline, which could have a material adverse effect on its results of operations and distributable cash flow. Enable has no control over producers or its drilling and production decisions, which are affected by, among other things:
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• | the availability and cost of capital;

• | prevailing and projected commodity prices, including the prices of natural gas, NGLs and crude oil;

• | demand for natural gas, NGLs and crude oil;

• | levels of reserves;

• | geological considerations;

• | environmental or other governmental regulations, including the availability of drilling permits and the regulation of hydraulic fracturing; and

• | the availability of drilling rigs and other costs of production and equipment.

Fluctuations in energy prices can also greatly affect the development of new natural gas and crude oil rese rves. Drilling and production activity generally decreases as commodity prices decrease. In general terms, the prices of natural gas, crude oil and other hydrocarbon products fluctuate in response to changes in supply and demand, market uncertainty and a variety of additional factors that are beyond its control. Because of these factors, even if new natural gas or crude oil reserves are known to exist in areas served by its assets, producers may choose not to develop those reserves. Declines in natural gas or crude oil prices can have a negative impact on exploration, development and production activity and, if sustained, could lead to decreases in such activity. A sustained decline could also lead producers to shut in production from its existing wells. Sustained reductions in exploration or production activity in its areas of operation could lead to further reductions in the utilization of its systems, which could have a material adverse effect on its business, financial condition, results of operations and ability to make quarterly cash distributions to its unitholders, including us.
In addition, it may be more difficult to maintain or increase the current volumes on its gathering systems, as several of the formations in the unconventional resource plays in which Enable operates generally has higher initial production rates and steeper production decline curves than wells in more conventional basins. Should Enable determine that the economics of its gathering assets do not justify the capital expenditures needed to grow or maintain volumes associated therewith, it may reduce such capital expenditures, which could cause revenues associated with these assets to decline over time. In addition to capital expenditures to support growth, the steeper production decline curves associated with unconventional resource plays may require Enable to incur higher maintenance capital expenditures relative to throughput over time, which will reduce its distributable cash flow.
Because of these and other factors, even if new reserves are known to exist in areas served by its assets, producers may choose not to develop those reserves. Reductions in drilling activity would result in an inability to maintain the current levels of throughput on its systems and could have a material adverse effect on its results of operations and distributable cash flow.
Enable’s industry is highly competitive, and increased competitive pressure could adversely affect its results of operations and distributable cash flow.
Enable competes with similar enterprises in its respective areas of operation. The principal elements of competition are rates, terms of service and flexibility and reliability of service. Competitors include large crude oil, natural gas and petrochemical companies that have greater financial resources and access to supplies of natural gas, NGLs and crude oil other than Enable. Some of these competitors may expand or construct gathering, processing, transportation and storage systems that would create additional competition for the services Enable provides to its customers. Excess pipeline capacity in the regions served by our interstate pipelines could also increase competition and adversely impact the ability to renew or enter into new contracts with respect to available capacity when existing contracts expire. In addition, customers that are significant producers of natural gas may develop their own gathering, processing, transportation and storage systems in lieu of using Enable. Enable’s ability to renew or replace existing contracts with customers at rates sufficient to maintain current revenues and cash flows could be adversely affected by the activities of its competitors and customers. Further, natural gas utilized as a fuel competes with other forms of energy available to end-users, including electricity, coal and liquid fuels. Increased demand for such forms of energy at the expense of natural gas could lead to a reduction in demand for natural gas gathering, processing, transportation and transportation services. All of these competitive pressures could adversely affect its results of operations and distributable cash flow.
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Enable derives a substantial portion of its operating income and cash flow from subsidiaries through which it holds a substantial portion of its assets.
Enable derives a substantial portion of its operating income and cash flow from, and holds a substantial portion of its assets through, its subsidiaries. As a result, it depends on distributions from its subsidiaries in order to meet its payment obligations. In general, these subsidiaries are separate and distinct legal entities and have no obligation to provide Enable with funds for its payment obligations, whether by dividends, distributions, loans or otherwise. In addition, provisions of applicable law, such as those limiting the legal sources of dividends, limit its subsidiaries’ ability to make payments or other distributions, and its subsidiaries could agree to contractual restrictions on its ability to make distributions.
The right by Enable to receive any assets of any subsidiary, and therefore the right of its creditors to participate in those assets, will be effectively subordinated to the claims of that subsidiary’s creditors, including trade creditors. In addition, even if Enable were a creditor of any subsidiary, its rights as a creditor would be subordinated to any security interest in the assets of that subsidiary and any indebtedness of the subsidiary senior to that held by them.
The amount of cash Enable has available for distribution to holders of its common and subordinated units depends primarily on its cash flow rather than on its profitability, which may prevent Enable from making distributions, even during periods in which Enable records net income.
The amount of cash Enable has available for distribution depends primarily upon its cash flows and not solely on profitability, which will be affected by non-cash items. As a result, Enable may make cash distributions during periods when it records losses for financial accounting purposes and may not make cash distributions during periods when it records net earnings for financial accounting purposes.
Enable is expected to pay a specified minimum quarterly distribution on its outstanding units to the extent it has sufficient cash from operations after establishment of cash reserves and payment of fees and expenses, including payments to its general partner and its affiliates. The principal difference between Enable’s common units and subordinated units is that in any quarter during the applicable subordination period, holders of the subordinated units are not entitled to receive any distribution until the common units have received the minimum quarterly distribution plus any arrearages in the payment of the minimum quarterly distribution on common units from prior quarters. If Enable does not pay distributions on its subordinated units, its subordinated units will not accrue arrearages for those unpaid distributions.
Enable may not be able to recover the costs of its substantial planned investment in capital improvements and additions, and the actual cost of such improvements and additions may be significantly higher than it anticipates.
Enable's business plan calls for extensive investment in capital improvements and additions. Capital expenditures are could range from approximately $600 million to $800 million for the year ending December 31, 2015, not including opportunities currently under evaluation which could add up to an additional $300 million of expansion capital expenditures. For example, Enable is currently constructing two cryogenic processing facilities that it plans to connect to its super-header system in Grady County, Oklahoma, which are expected to add 400 MMcf/d of natural gas processing capacity. The first of the two new plants (the Bradley Plant) is expected to be completed in the first quarter of 2015. The second plant (the Grady County Plant) is a 200 MMcf/d plant that is expected to be completed in the first quarter of 2016. Enable also plans to construct significant natural gas gathering and compression infrastructure to support producer activity in its growth areas, and Enable anticipates that in 2015 it will complete the construction of its two crude gathering systems in North Dakota’s Bakken shale formation with combined capacity of 49,500 Bbl/d.
The construction of additions or modifications to Enable's existing systems, and the construction of new midstream assets, involves numerous regulatory, environmental, political and legal uncertainties, many of which are beyond its control and may require the expenditure of significant amounts of capital, which may exceed estimates. These projects may not be completed at the planned cost, on schedule or at all. The construction of new pipeline, gathering, treating, processing, compression or other facilities is subject to construction cost overruns due to labor costs, costs of equipment and materials such as steel, labor shortages or weather or other delays, inflation or other factors, which could be material. In addition, the construction of these facilities is typically subject to the receipt of approvals and permits from various regulatory agencies. Those agencies may not approve the projects in a timely manner, if at all, or may impose restrictions or conditions on the projects that could potentially prevent a project from proceeding, lengthen its expected completion schedule and/or increase its anticipated cost. Moreover, revenues and cash flows may not increase immediately upon the expenditure of funds on a particular project. For instance, if an existing pipeline expanded or a new pipeline constructed, the construction may occur over an extended period of time, and not receive any material increases in revenues or cash flows until the project is completed. In addition Enable may construct facilities to capture anticipated future growth in production in a region in which such growth does not materialize. As a result, the new facilities may not be able
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to achieve an expected investment return, which could adversely affect its results of operations and ability to make cash distributions to its unitholders, including us.
In connection with its capital investments, Enable may engage a third party to estimate potential reserves in areas to be developed prior to constructing facilities in those areas. To the extent Enable relies on estimates of future production in deciding to construct additions to its systems, those estimates may prove to be inaccurate due to numerous uncertainties inherent in estimating future production. As a result, new facilities may not be able to attract sufficient throughput to achieve expected investment return, which could adversely affect its results of operations and ability to make cash distributions to unitholders. In addition, the construction of additions to existing gathering and transportation assets may require new rights-of-way prior to construction. Those rights-of-way to connect new natural gas supplies to existing gathering lines may be unavailable, and it may not be able to capitalize on attractive expansion opportunities. Additionally, it may become more expensive to obtain new rights-of-way or to renew existing rights-of-way. If the cost of renewing or obtaining new rights-of-way increases, its results of operations and ability to make cash distributions to unitholders, including us, could be adversely affected.
Natural gas, NGL and crude oil prices are volatile, and changes in these prices could adversely affect Enable's results of operations and its ability to make cash distributions.
Enable's results of operations and ability to make cash distributions to us could be negatively affected by adverse movements in the prices of natural gas, NGLs and crude oil depending on factors that are beyond its control. These factors include demand for these commodities, which fluctuates with changes in market and economic conditions and other factors, including the impact of seasonality and weather, general economic conditions, the level of domestic and offshore natural gas production and consumption, the availability of imported natural gas, liquefied natural gas, NGLs and crude oil, actions taken by foreign natural gas and oil producing nations, the availability of local, intrastate and interstate transportation systems, the availability and marketing of competitive fuels, the impact of energy conservation efforts, technological advances affecting energy consumption and the extent of governmental regulation and taxation.
Enable's keep-whole natural gas processing arrangements, which accounted for 7% of its natural gas processed volumes in 2014, expose them to fluctuations in the pricing spreads between NGL prices and natural gas prices. Under these arrangements, the processor processes raw natural gas to extract NGLs and pays to the producer the natural gas equivalent Btu value of raw natural gas received from the producer in the form of either processed natural gas or its cash equivalent. The processor is generally entitled to retain the processed NGLs and to sell them for its own account. Accordingly, the processor’s margin is a function of the difference between the value of the NGLs produced and the cost of the processed natural gas used to replace the natural gas equivalent Btu value of those NGLs. Therefore, if natural gas prices increase and NGL prices do not increase by a corresponding amount, the processor has to replace the Btu of natural gas at higher prices and processing margins are negatively affected.
Enable's percent-of-proceeds and percent-of-liquids natural gas processing agreements accounted for 44% of its natural gas processed volumes in 2014. Under these arrangements, the processor generally gathers raw natural gas from producers at the wellhead, transports the natural gas through its gathering system, processes the natural gas and sells the processed natural gas and/or NGLs at prices based on published index prices. The price paid to producers is based on an agreed percentage of the actual proceeds of the sale of processed natural gas, NGLs or both, or the expected proceeds based on an index price. Enable refers to contracts in which the processor shares in specified percentages of the proceeds from the sale of natural gas and NGLs as “percent-of-proceeds” arrangements, and contracts in which the processor receives proceeds from the sale of a percentage of the NGLs or the NGLs themselves as compensation for processing services as “percent-of-liquids” arrangements. These arrangements expose Enable to risks associated with the price of natural gas and NGLs.
At any given time, Enable's overall portfolio of processing contracts may reflect a net short position in natural gas (meaning that it is a net buyer of natural gas) and a net long position in NGLs (meaning that it is a net seller of NGLs). As a result, its gross margin could be adversely impacted to the extent the price of NGLs decreases in relation to the price of natural gas.
Enable has limited experience in the crude oil gathering business.
In November 2013, Enable commenced operations on its initial crude oil gathering pipeline system located in Dunn and McKenzie Counties in North Dakota within the Bakken Shale formation. Additionally in February 2014, Enable executed a crude oil gathering agreement to gather crude oil production through a new system in Williams and Mountrail Counties in North Dakota that is expected to commence operations in the first quarter of 2015. These facilities, with a combined capacity of 49,500 barrels per day, are the first crude oil gathering systems that we have built and operated. Other operators of gathering systems in the Bakken Shale formation may have more experience in the construction, operation and maintenance of crude oil gathering systems
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than Enable does. This relative lack of experience may hinder Enable's ability to fully implement its business plan in a timely and cost efficient manner, which, in turn, may adversely affect its results of operations and its ability to make cash distributions to unitholders.
Enable provides certain transportation and storage services under long-term, fixed-price “negotiated rate” contracts that are not subject to adjustment, even if the cost to perform such services exceeds the revenues received from such contracts, and, as a result, costs could exceed revenues received under such contracts.
Enable has been authorized by the FERC, to provide transportation and storage services at its facilities at negotiated rates. Generally, negotiated rates are in excess of the maximum recourse rates allowed by the FERC, but it is possible that costs to perform services under “negotiated rate” contracts will exceed the revenues obtained under these agreements. If this occurs, it could decrease the cash flow realized by its systems and, therefore, decrease the cash available for distribution to its unitholders, including us.
As of December 31, 2014, approximately 56% of Enable's contracted transportation firm capacity and 44% of its contracted storage firm capacity was subscribed under such “negotiated rate” contracts. These contracts generally do not include provisions allowing for adjustment for increased costs due to inflation, pipeline safety activities or other factors that are not tied to an applicable tracking mechanism authorized by the FERC. Successful recovery of any shortfall of revenue, representing the difference between “recourse rates” (if higher) and negotiated rates, is not assured under current FERC policies.
If third-party pipelines and other facilities interconnected to Enable's gathering, processing or transportation facilities become partially or fully unavailable to Enable for any reason, Enable's results of operations and its ability to make cash distributions to us could be adversely affected.
Enable depends upon third-party natural gas pipelines to deliver natural gas to, and take natural gas from, its transportation systems. it also depends on third-party facilities to transport and fractionate NGLs that are delivered to the third party at the tailgates of the processing plants. Fractionation is the separation of the heterogeneous mixture of extracted NGLs into individual components for end-use sale. For example, an outage or disruption on certain pipelines or fractionators operated by a third party could result in the shutdown of certain of its processing plants, and a prolonged outage or disruption could ultimately result in a reduction in the volume of NGLs it is able to produce. Additionally, Enable depends on third parties to provide electricity for compression at many of its facilities. Since it does not own or operate any of these third-party pipelines or other facilities, continuing operation of those facilities is not within its control. If any of these third-party pipelines or other facilities become partially or fully unavailable to Enable for any reason, its results of operations and ability to make cash distributions to us could be adversely affected.
Enable does not own all of the land on which its pipelines and facilities are located, which could disrupt its operations.
Enable does not own all of the land on which its pipelines and facilities have been constructed, and it is therefore subject to the possibility of more onerous terms and/or increased costs to retain necessary land use if it does not have valid rights-of-way or if such rights-of-way lapse or terminate. Enable may obtain the rights to construct and operate its pipelines on land owned by third parties and governmental agencies for a specific period of time. A loss of these rights, through its inability to renew right-of-way contracts or otherwise, could cause a cease in operations temporarily or permanently on the affected land, increase costs related to the construction and continuing operations elsewhere, and adversely affect its results of operations and ability to make cash distributions to unitholders, including us.
Enable conducts a portion of its operations through joint ventures, which subjects them to additional risks that could have a material adverse effect on the success of its operations, financial position and results of operations.
Enable conducts a portion of its operations through joint ventures with third parties, including affiliates of Spectra Energy Corp., DCP Midstream Partners, LP, Trans Louisiana Gas Pipeline, Inc. and Pablo Gathering LLC. It may also enter into other joint venture arrangements in the future. These third parties may have obligations that are important to the success of the joint venture, such as the obligation to pay their share of capital and other costs of the joint venture. The performance of these third-party obligations, including the ability of the third parties to satisfy their obligations under these arrangements, is outside the control of Enable. If these parties do not satisfy their obligations under these arrangements, Enable's business may be adversely affected.
The joint venture arrangements of Enable may involve risks not otherwise present when operating assets directly, including, for example:
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• | joint venture partners may share certain approval rights over major decisions;

• | joint venture partners may not pay their share of the joint venture’s obligations, leaving Enable liable for their shares of joint venture liabilities;

• | it may be unable to control the amount of cash it will receive from the joint venture;

• | it may incur liabilities as a result of an action taken by its joint venture partners;

• | it may be required to devote significant management time to the requirements of and matters relating to the joint ventures;

• | its insurance policies may not fully cover loss or damage incurred by both them and its joint venture partners in certain circumstances;

• | its joint venture partners may be in a position to take actions contrary to its instructions or requests or contrary to its policies or objectives; and

• | disputes between them and its joint venture partners may result in delays, litigation or operational impasses.

The risks described above or the failure to continue joint ventures or to resolve disagreements with joint venture partners could adversely affect Enable's ability to transact the business that is the subject of such joint venture, which would in turn negatively affect its financial condition and results of operations. The agreements under which certain joint ventures were formed may subject them to various risks, limit the actions it may take with respect to the assets subject to the joint venture and require them to grant rights to its joint venture partners that could limit its ability to benefit fully from future positive developments. Some joint ventures require Enable to make significant capital expenditures. If it does not timely meet its financial commitments or otherwise do not comply with its joint venture agreements, its rights to participate, exercise operator rights or otherwise influence or benefit from the joint venture may be adversely affected. Certain of its joint venture partners may have substantially greater financial resources than Enable has and it may not be able to secure the funding necessary to participate in operations its joint venture partners propose, thereby reducing its ability to benefit from the joint venture.
Under certain circumstances, affiliates of Spectra Energy Corp will have the right to purchase an ownership interest in SESH at fair market value.
Enable owns a 49.90% ownership interest in SESH. The remaining 0.1% and 50% ownership interests are held by affiliates of CenterPoint Energy and Spectra Energy Corp, respectively. Under the master formation agreement, CenterPoint Energy has certain put rights, and Enable has certain call rights, exercisable with respect to the interest in SESH retained by CenterPoint Energy, under which CenterPoint Energy would contribute to Enable its interest in SESH at a price equal to the fair market value of the interest at the time the put right or call right is exercised.
CenterPoint Energy owns a 55.4% limited partner interest in Enable and a 40% economic interest in the general partner. Pursuant to the terms of the limited liability company agreement of SESH, as amended (the SESH LLC Agreement), if, at any time, CenterPoint Energy has a right to receive less than 50% of Enable's distributions through its limited partner interest in Enable and its economic interest in the general partner, affiliates of Spectra Energy Corp will have the right to purchase Enable's 49.90% interest in SESH at fair market value. Affiliates of Spectra Energy Corp will also have a preferential purchase right with respect to any interest in SESH transferred to Enable by CenterPoint Energy if, at the time such interest is transferred, Enable is not an “affiliate” of CenterPoint Energy, as such term is defined in the SESH LLC Agreement. Under the master formation agreement, Enable is entitled to receive the cash consideration related to any exercise of these rights by Spectra Energy Corp or its affiliates.
Enable business involves many hazards and operational risks, some of which may not be fully covered by insurance. Insufficient insurance coverage and increased insurance costs could adversely impact its results of operations or ability to make cash distributions to us.
Enable' operations are subject to all of the risks and hazards inherent in the gathering, processing, transportation and storage of natural gas and crude oil, including:

• | damage to pipelines and plants, related equipment and surrounding properties caused by hurricanes, tornadoes, floods, fires and other natural disasters, acts of terrorism and actions by third parties;

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• | inadvertent damage from construction, vehicles, farm and utility equipment;

• | leaks of natural gas, crude oil and other hydrocarbons or losses of natural gas and crude oil as a result of the malfunction of equipment or facilities;

• | ruptures, fires and explosions; and

• | other hazards that could also result in personal injury and loss of life, pollution and suspension of operations.

These risks could result in substantial losses due to personal injury and/or loss of life, severe damage to and destruction of property, plant and equipment and pollution or other environmental damage. These risks may also result in curtailment or suspension of its operations. A natural disaster or other hazard affecting the areas in which it operates could have a material adverse effect on its operations. Enable is not fully insured against all risks inherent in its business. Enable currently has general liability and property insurance in place to cover certain of its facilities in amounts that it considers appropriate. Such policies are subject to certain limits and deductibles. It does not have business interruption insurance coverage for all of its operations. Insurance coverage may not be available in the future at current costs or on commercially reasonable terms, and the insurance proceeds received for any loss of, or any damage to, any of its facilities may not be sufficient to restore the loss or damage without negative impact on its results of operations and ability to make cash distributions to its unitholders, including us.
The use of derivative contracts by Enable and its subsidiaries in the normal course of business could result in financial losses that could negatively impact its results of operations and its ability to make cash distributions to unitholders.
Enable and its subsidiaries periodically use derivative instruments, such as swaps, options, futures and forwards, to manage its commodity and financial market risks. Enable and its subsidiaries could recognize financial losses as a result of volatility in the market values of these contracts, or should a counterparty fail to perform. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management’s judgment or use of estimates. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.
Failure to attract and retain an appropriately qualified workforce could adversely impact Enable's results of operations.
Enable transitioned seconded employees from CenterPoint Energy and OGE Energy to the Partnership effective January 1, 2015, except for those employees who are participants under OGE Energy’s defined benefit and retiree medical plans, who will remain seconded to the Partnership, subject to certain termination rights of the Partnership and OGE Energy. Employees of OGE Energy that Enable determines to hire are under no obligation to accept Enable's offer of employment on the terms Enable provides, or at all.
Enable's business is dependent on its ability to recruit, retain and motivate employees. Certain circumstances, such as an aging workforce without appropriate replacements, a mismatch of existing skill sets to future needs, competition for skilled labor or the unavailability of contract resources may lead to operating challenges such as a lack of resources, loss of knowledge or a lengthy time period associated with skill development. Enable's costs, including costs for contractors to replace employees, productivity costs and safety costs, may rise. Failure to hire and adequately train replacement employees, including the transfer of significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Enable's ability to manage and operate our business. If Enable is unable to successfully attract and retain an appropriately qualified workforce, its results of operations could be negatively affected.
Enable’s ability to grow is dependent on its ability to access external financing sources.
Enable expects its operating subsidiaries will distribute all of their available cash to Enable and that it will distribute all of its available cash to its unitholders. As a result, Enable expects that it and its operating subsidiaries will rely primarily upon external financing sources, including commercial bank borrowings and the issuance of debt and equity securities, to fund acquisitions and expansion capital expenditures. As a result, to the extent Enable or its operating subsidiaries are unable to finance growth externally, its operating subsidiaries' cash distribution policy will significantly impair its operating subsidiaries' ability to grow. In addition, because it and its operating subsidiaries distribute all available cash, its operating subsidiaries' growth may not be as fast as businesses that reinvest their available cash to expand ongoing operations.
To the extent Enable issues additional units in connection with any acquisitions or expansion capital expenditures, the payment of distributions on those additional units may increase the risk it will be unable to maintain or increase its per unit
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distribution level, which in turn may impact the available cash that we have to distribute on each unit. There are no limitations in the partnership agreement on its ability to issue additional units, including units ranking senior to the common units. The incurrence of additional commercial borrowings or other debt by Enable or its operating subsidiaries to finance its growth strategy would result in increased interest expense, which in turn may negatively impact the available cash that its operating subsidiaries have to distribute to it, and thus that it has to distribute to its unitholders, including us.
If Enable does not make acquisitions or is unable to make acquisitions on economically acceptable terms, its future growth will be limited.
Enable's growth strategy includes, in part, the ability to make acquisitions that result in an increase in its cash generated from operations. If it is unable to make these accretive acquisitions either because: (i) it is unable to identify attractive acquisition targets or it is unable to negotiate purchase contracts on acceptable terms, (ii) it is unable to obtain acquisition financing on economically acceptable terms, or (iii) it is outbid by competitors, then its future growth and ability to increase distributions will be adversely affected.
Enable's merger and acquisition activities may not be successful or may result in completed acquisitions that do not perform as anticipated.
From time to time, Enable has made, and it intends to continue to make, acquisitions of businesses and assets. Such acquisitions involve substantial risks, including the following:

• | acquired businesses or assets may not produce revenues, earnings or cash flow at anticipated levels;

• | acquired businesses or assets could have environmental, permitting or other problems for which contractual protections prove inadequate;

• | it may assume liabilities that were not disclosed to it, that exceed its estimates, or for which its rights to indemnification from the seller are limited;

• | it may be unable to integrate acquired businesses successfully and realize anticipated economic, operational and other benefits in a timely manner, which could result in substantial costs and delays or other operational, technical or financial problems; and

• | acquisitions, or the pursuit of acquisitions, could disrupt its ongoing businesses, distract management, divert resources and make it difficult to maintain its current business standards, controls and procedures.

Enable and its operating subsidiaries’ debt levels may limit its flexibility in obtaining additional financing and in pursuing other business opportunities.
As of December 31, 2014, Enable had approximately $1.9 billion of long-term debt outstanding, excluding the premiums on senior notes. Enable has $363 million of long-term notes payable - affiliated companies due to CenterPoint Energy. Enable also has a $1.4 billion revolving credit facility for working capital, capital expenditures and other partnership purposes, including acquisitions, of which $1.1 billion was available as of December 31, 2014. As of January 31, 2015, Enable had the ability to issue up to $1.2 billion in commercial paper, subject to available borrowing capacity under its revolving credit facility and market conditions, to manage the timing of cash flows and fund short-term working capital deficits. As of January 31, 2015, $224 million was outstanding under its commercial paper program. Enable will continue to have the ability to incur additional debt, subject to limitations in its credit facilities. The levels of debt could have important consequences, including the following:

• | the ability to obtain additional financing, if necessary, for working capital, capital expenditures, acquisitions or other purposes may be impaired or the financing may not be available on favorable terms, if at all;

• | a portion of cash flows will be required to make interest payments on the debt, reducing the funds that would otherwise be available for operations, future business opportunities and distributions;

• | the debt level will make Enable more vulnerable to competitive pressures or a downturn in the business or the economy generally; and

• | the debt level may limit flexibility in responding to changing business and economic conditions.

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Enable’s and its operating subsidiaries’ ability to service its debt will depend upon, among other things, its future financial and operating performance, which will be affected by prevailing economic conditions and financial, business, regulatory and other factors, some of which are beyond its control. If operating results are not sufficient to service its operating subsidiaries' current or future indebtedness, it and its subsidiaries may be forced to take actions such as reducing distributions, reducing or delaying business activities, acquisitions, investments or capital expenditures, selling assets, restructuring or refinancing debt, or seeking additional equity capital. These actions may not be effected on satisfactory terms, or at all.
Enable’s credit facilities contain operating and financial restrictions, including covenants and restrictions that may be affected by events beyond its control, which could adversely affect its business, financial condition, results of operations and ability to make quarterly distributions to its unitholders.

• | Enable's credit facilities contain customary covenants that, among other things, limit the ability to:

• | permit its subsidiaries to incur or guarantee additional debt;

• | incur or permit to exist certain liens on assets;

• | dispose of assets;

• | merge or consolidate with another company or engage in a change of control;

• | enter into transactions with affiliates on non-arm’s length terms; and

• | change the nature of its business.

Enable’s credit facilities also require it to maintain certain financial ratios. Its ability to meet those financial ratios can be affected by events beyond its control, and assurance it will meet those ratios cannot be guaranteed. In addition, its credit facilities contain events of default customary for agreements of this nature.
Enable's ability to comply with the covenants and restrictions contained in its credit facilities may be affected by events beyond its control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, its ability to comply with these covenants may be impaired. If any of the restrictions, covenants, ratios or tests in its credit facilities is violated, a significant portion of its indebtedness may become immediately due and payable. In addition, its lenders’ commitments to make further loans to Enable under the revolving credit facility may be suspended or terminated. Enable might not have, or be able to obtain, sufficient funds to make these accelerated payments.
Cyber-attacks, acts of terrorism or other disruptions could adversely impact Enable's results of operations and its ability to make cash distributions to unitholders.
Enable is subject to cyber-security risks related to breaches in the systems and technology that it uses (i) to manage its operations and other business processes and (ii) to protect sensitive information maintained in the normal course of its businesses. The gathering, processing and transportation of natural gas from its gathering, processing and pipeline facilities are dependent on communications among its facilities and with third-party systems that may be delivering natural gas into or receiving natural gas and other products from its facilities. Disruption of those communications, whether caused by physical disruption such as storms or other natural phenomena, by failure of equipment or technology, or by manmade events, such as cyber-attacks or acts of terrorism, may disrupt its ability to deliver natural gas and control these assets. Cyber-attacks could also result in the loss of confidential or proprietary data or security breaches of other information technology systems that could disrupt its operations and critical business functions, adversely affect its reputation, and subject Enable to possible legal claims and liability. Enable is not fully insured against all cyber-security risks any of which could have a material adverse effect on its results of operations and its ability to make cash distributions to unitholders. In addition, its natural gas pipeline systems may be targets of terrorist activities that could disrupt its ability to conduct its business and have a material adverse effect on its results of operations and its ability to make cash distributions to unitholders. It is possible that any of these occurrences, or a combination of them, could have a material adverse effect on its business, financial condition and results of operations.
Enable may be unable to obtain or renew permits necessary for its operations, which could inhibit its ability to do business.
Performance of its operations require it obtain and maintain a number of federal and state permits, licenses and approvals with terms and conditions containing a significant number of prescriptive limits and performance standards in order to operate.
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All of these permits, licenses, approval limits and standards require a significant amount of monitoring, record keeping and reporting in order to demonstrate compliance with the underlying permit, license, approval limit or standard. Noncompliance or incomplete documentation of our compliance status may result in the imposition of fines, penalties and injunctive relief. A decision by a government agency to deny or delay the issuance of a new or existing material permit or other approval, or to revoke or substantially modify an existing permit or other approval, could adversely affect its ability to initiate or continue operations at the affected location or facility and on its financial condition, results of operations and cash flows.
Additionally, in order to obtain permits and renewals of permits and other approvals in the future, Enable may be required to prepare and present data to governmental authorities pertaining to the potential adverse impact that any proposed pipeline or processing-related activities may have on the environment, individually or in the aggregate, including on public and Indian lands. Certain approval procedures may require preparation of archaeological surveys, endangered species studies and other studies to assess the environmental impact of new sites or the expansion of existing sites. Compliance with these regulatory requirements is expensive and significantly lengthens the time required to prepare applications and to receive authorizations.
Costs of compliance with existing environmental laws and regulations are significant, and the cost of compliance with future environmental laws and regulations may adversely affect Enable's results of operations and its ability to make cash distributions to unitholders, including us.
Enable is subject to extensive federal, state and local environmental statutes, rules and regulations relating to air quality, water quality, waste management, wildlife conservation, natural resources and health and safety that could, among other things, delay or increase costs of construction, restrict or limit the output of certain facilities and/or require additional pollution control equipment and otherwise increase costs. There are significant capital, operating and other costs associated with compliance with these environmental statutes, rules and regulations and those costs may be even more significant in the future.
There is inherent risk of the incurrence of environmental costs and liabilities in its operations due to the handling of natural gas, NGLs and crude oil, air emissions related to its operations and historical industry operations and waste disposal practices. These activities are subject to stringent and complex federal, state and local laws and regulations governing environmental protection, including the discharge of materials into the environment and the protection of plants, wildlife, and natural and cultural resources. These laws and regulations can restrict or impact business activities in many ways, such as restricting the handling or disposing of wastes or requiring remedial action to mitigate pollution conditions that may be caused by its operations or that are attributable to former operators. Joint and several strict liability may be incurred, without regard to fault, under certain of these environmental laws and regulations in connection with discharges or releases of wastes on, under or from its properties and facilities, many of which have been used for midstream activities for a number of years, oftentimes by third parties not under its control. Private parties, including the owners of the properties through which its gathering systems pass and facilities where its wastes are taken for reclamation or disposal, may also have the right to pursue legal actions to enforce compliance, as well as to seek damages for non- compliance, with environmental laws and regulations or for personal injury or property damage. For example, an accidental release from one of its pipelines could subject them to substantial liabilities arising from environmental cleanup and restoration costs, claims made by neighboring landowners and other third parties for personal injury and property damage and fines or penalties for related violations of environmental laws or regulations. Enable may be unable to recover these costs from insurance. Moreover, the possibility exists that stricter laws, regulations or enforcement policies could significantly increase compliance costs and the cost of any remediation that may become necessary. Further, stricter requirements could negatively impact its customers’ production and operations, resulting in less demand for its services.
Increased regulation of hydraulic fracturing could result in reductions or delays in natural gas production by Enable's customers, which could adversely affect its results of operations and ability to make cash distributions to its unitholders, including us.
Hydraulic fracturing is an important and common practice that is used to stimulate production of natural gas and/or oil from dense subsurface rock formations. The hydraulic fracturing process involves the injection of water, sand, and chemicals under pressure into targeted subsurface formations to fracture the surrounding rock and stimulate production. Many of its customers commonly use hydraulic fracturing techniques in their drilling and completion programs. Hydraulic fracturing typically is regulated by state oil and natural gas commissions. In addition, certain federal agencies have proposed additional laws and regulations to more closely regulate the hydraulic fracturing process. For example, in January 2015, the EPA indicated its intention to propose more stringent rules regulating methane and volatile organic compound emissions from hydraulic fracturing and other well completion activity. Congress from time to time has considered the adoption of legislation to provide for federal regulation of hydraulic fracturing under the Safe Drinking Water Act and to require disclosure of the chemicals used in the hydraulic fracturing process. Some states have adopted, and other states are considering adopting, legal requirements that could impose more stringent permitting, public disclosure or well construction requirements on hydraulic fracturing activities. Local government also may seek to adopt ordinances within their jurisdictions regulating the time, place and manner of drilling activities in general or hydraulic
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fracturing activities in particular, in some cases banning hydraulic fracturing. For example, in Texas, the City of Denton recently enacted a local ordinance that would restrict hydraulic fracturing activities. If new or more stringent federal, state or local legal restrictions relating to the hydraulic fracturing process are adopted in areas where its oil and natural gas exploration and production customers operate, such customers could incur potentially significant added costs to comply with such requirements, experience delays or curtailment in the pursuit of exploration, development, or production activities, and perhaps even be precluded from drilling wells, some or all of which activities could adversely affect demand for its services to those customers.
In addition, certain governmental reviews have been conducted or are underway that focus on environmental aspects of hydraulic fracturing practices. The U.S. Environmental Protection Agency, or the EPA, has commenced a study of the potential environmental effects of hydraulic fracturing on drinking water and groundwater. A draft final report drawing conclusions about the potential impacts of hydraulic fracturing on drinking water resources is expected to be available for public comment and peer review by March 2015. The White House Council on Environmental Quality is coordinating an administration-wide review of hydraulic fracturing practices. Other governmental agencies, including the U.S. Department of Energy, have evaluated or are evaluating various other aspects of hydraulic fracturing. These ongoing or proposed studies, depending on their degree of pursuit and any meaningful results obtained, could spur initiatives to further regulate hydraulic fracturing under the Safe Drinking Water Act or other regulatory mechanisms.
Enable may incur substantial liabilities to comply with climate change legislation and regulatory initiatives.
Because Enable's operations emit various types of greenhouse gases, legislation and regulations governing greenhouse gas emissions could increase its costs related to operating and maintaining its facilities, and could delay future permitting. At the federal level, the EPA has adopted regulations under existing provisions of the federal Clean Air Act that, among other things, require the monitoring and reporting of greenhouse gas emissions from specified onshore and offshore oil and natural gas production sources in the United States on an annual basis, which include certain of Enable's operations. Additional EPA rules could affect Enable's ability to obtain air permits for new or modified facilities. In addition, the U.S. Congress has in the past and may in the future consider legislation to reduce emissions of greenhouse gases, a number of state and regional efforts have emerged that are aimed at tracking and/or reducing greenhouse gas emissions by means of cap and trade programs. These programs typically require major sources of greenhouse gas emissions to acquire and surrender emission allowances in return for emitting those greenhouse gases. Any such future laws and regulations imposing reporting obligations on, or limiting emissions of, greenhouse gases could require Enable to incur costs to reduce emissions of greenhouse gases. Substantial limitations on greenhouse gas emissions could also adversely affect demand for oil and natural gas. Depending on the particular program, Enable could in the future be required to purchase and surrender emission allowances or otherwise undertake measures to reduce greenhouse gas emissions. Any additional costs or operating restrictions associated with new legislation or regulations regarding greenhouse gas emissions could have a material adverse effect on its operating results and cash flows, in addition to the demand for its services.
Increased regulatory-imposed costs may increase the cost of consuming, and thereby reduce demand for, the products that Enable gathers, treats and transports. To the extent financial markets view climate change and emissions of greenhouse gases as a financial risk, this view could negatively affect its ability to access capital markets or cause them to receive less favorable terms and conditions. Consequently, legislation and regulatory initiatives aimed at reducing greenhouse gases could have a material adverse effect on its results of operations and ability to make cash distributions to its unitholders, including us.
Finally, it should be noted that some scientists have concluded that increasing concentrations of greenhouse gases in the Earth’s atmosphere may produce climate changes that have significant physical effects, such as increased frequency and severity of storms, floods and other climatic events; if any such effects were to occur, they could have a material adverse effect on Enable's operations.
Enable's operations are subject to extensive regulation by federal regulatory authorities. Changes or additional regulatory measures adopted by such authorities could have a material adverse effect on its results of operations and ability to make cash distributions to its unitholders, including us.
The rates charged by several of Enable's pipeline systems, including for interstate gas transportation service provided by its intrastate pipelines, are regulated by the FERC. The FERC and state regulatory agencies also regulate other terms and conditions of the services it may offer. If one of these regulatory agencies, on its own initiative or due to challenges by third parties, were to lower its tariff rates or deny any rate increase or other material changes to the types, or terms and conditions, of service it might propose or offer, the profitability of its pipeline businesses could suffer. If it were permitted to raise its tariff rates for a particular pipeline, there might be significant delay between the time the tariff rate increase is approved and the time that the rate increase actually goes into effect, which could also limit profitability. Furthermore, competition from other pipeline systems may prevent them from raising its tariff rates even if permitted by regulatory agencies. The regulatory agencies that regulate its systems periodically implement new rules, regulations and terms and conditions of services subject to its jurisdiction. New initiatives or
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orders may adversely affect the rates charged for services or otherwise adversely affect its financial condition, results of operations and cash flows and ability to make cash distributions to its unitholders, including us.
Enable's natural gas interstate pipelines are regulated by FERC under the Natural Gas Act of 1938, the Natural Gas Policy Act of 1978 and the Energy Policy Act of 2005, Generally, FERC’s authority over interstate natural gas transportation extends to:

• | rates, operating terms, conditions of service and service contracts;

• | certification and construction of new facilities;

• | extension or abandonment of services and facilities or expansion of existing facilities;

• | maintenance of accounts and records;

• | acquisition and disposition of facilities;

• | initiation and discontinuation of services;

• | depreciation and amortization policies;

• | conduct and relationship with certain affiliates;

• | market manipulation in connection with interstate sales, purchases or natural gas transportation; and

• | various other matters.

FERC’s jurisdiction extends to the certification and construction of interstate transportation and storage facilities, including, but not limited to expansions, lateral and other facilities and abandonment of facilities and services. Prior to commencing construction of significant new interstate transportation and storage facilities, an interstate pipeline must obtain a certificate authorizing the construction, or an order amending its existing certificate, from FERC. Certain minor expansions are authorized by blanket certificates that FERC has issued by rule. Typically, a significant expansion project requires review by a number of governmental agencies, including state and local agencies, whose cooperation is important in completing the regulatory process on schedule. Any failure by an agency to issue sufficient authorizations or permits in a timely manner for one or more of these projects may mean that we will not be able to pursue these projects or that they will be constructed in a manner or with capital requirements that we did not anticipate. Enable's inability to obtain sufficient permits and authorizations in a timely manner could materially and negatively impact the additional revenues expected from these projects.
FERC conducts audits to verify compliance with FERC’s regulations and the terms of its orders, including whether the websites of interstate pipelines accurately provide information on the operations and availability of services. FERC’s regulations require uniform terms and conditions for service, as set forth in agreements for transportation and storage services executed between interstate pipelines and their customers. These service agreements are required to conform, in all material respects, with the standard form of service agreements set forth in the pipeline’s FERC-approved tariff. Non-conforming agreements must be filed with, and accepted by, the FERC. In the event that FERC finds that an agreement, in whole or part, is materially non-conforming, it could reject the agreement or require us to seek modification, or alternatively require us to modify our tariff so that the non-conforming provisions are generally available to all customers.
The rates, terms and conditions for transporting natural gas in interstate commerce on certain of our intrastate pipelines and for services offered at certain of Enable's storage facilities are subject to the jurisdiction of FERC under Section 311 of the Natural Gas Policy Act. Rates to provide such interstate transportation service must be “fair and equitable” under the Natural Gas Policy Act and are subject to review, refund with interest if found not to be fair and equitable, and approval by FERC at least once every five years.
Enable's crude oil gathering pipelines are subject to common carrier regulation by FERC under the Interstate Commerce Act. The Interstate Commerce Act requires that Enable maintain tariffs on file with FERC setting forth the rates Enable charges for providing transportation services, as well as the rules and regulations governing such services. The ICA requires, among other things, that Enable's rates must be “just and reasonable” and that Enable provide service in a manner that is nondiscriminatory. Shippers on Enable's crude oil gathering pipelines may protest its tariff filings, file complaints against its existing rates, or FERC can investigate Enable's rates on its own initiative. In the event that FERC finds that Enable's existing or proposed rates are unjust and unreasonable, it could deny requested rate increases or could order Enable to reduce its rates and could require the payment of reparations to complaining shippers for up to two years prior to the complaint.
Enable’s operations may also be subject to regulation by state and local regulatory authorities. Changes or additional regulatory measures adopted by such authorities could adversely affect its results of operations and its ability to make cash distributions to unitholders, including us.
The pipeline operations of Enable that are not regulated by the FERC may be subject to state and local regulation applicable to intrastate natural and transportation services. The relevant states in which it operates include North Dakota, Oklahoma, Arkansas, Louisiana, Texas, Missouri, Kansas, Mississippi, Tennessee and Illinois. State and local regulations generally focus on
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safety, environmental and, in some circumstances, prohibition of undue discrimination among shippers. Additional rules and legislation pertaining to these matters are considered and, in some instances, adopted from time to time. The effect, if any, such changes might have on operations cannot be predicted, but Enable could be required to incur additional capital expenditures and increased costs depending on future legislative and regulatory changes. Other state and local regulations also may affect the business. Any such state or local regulation could have an adverse effect on the business and the results of operations.
Gathering lines may be subject to ratable take and common purchaser statutes. Ratable take statutes generally require gatherers to take, without undue discrimination, oil or natural gas production that may be tendered to the gatherer for handling. Similarly, common purchaser statutes generally require gatherers to purchase without undue discrimination as to source of supply or producer. These statutes restrict the right by Enable as an owner of gathering facilities to decide with whom it contracts to purchase or transport oil or natural gas. Federal law leaves economic regulation of natural gas gathering to the states. The states in which it operates have adopted complaint-based regulation of oil and natural gas gathering activities, which allows oil and natural gas producers and shippers to file complaints with state regulators in an effort to resolve grievances relating to access to oil and natural gas gathering pipelines and rate discrimination.
Other state regulations may not directly regulate the business, but may nonetheless affect the availability of natural gas for processing, including state regulation of production rates and maximum daily production allowable from gas wells. While its gathering lines are currently subject to limited state regulation, there is a risk that state laws will be changed, which may give producers a stronger basis to challenge the regulatory status of a line, or the rates, terms and conditions of a gathering line providing transportation service.
A change in the jurisdictional characterization of some of Enable’s assets by federal, state or local regulatory agencies or a change in policy by those agencies may result in increased regulation of its assets, which may cause its revenues to decline and operating expenses to increase.
Enable’s natural gas gathering and intrastate transportation operations are generally exempt from the jurisdiction of FERC under the Natural Gas Act, but FERC regulation may indirectly impact these businesses and the markets for products derived from these businesses. The FERC’s policies and practices across the range of its oil and natural gas regulatory activities, including, for example, its policies on interstate open access transportation, ratemaking, capacity release, and market center promotion may indirectly affect intrastate markets. In recent years, the FERC has pursued pro-competitive policies in its regulation of interstate oil and natural gas pipelines. However, it cannot be assured that the FERC will continue to pursue this approach as it considers matters such as pipeline rates and rules and policies that may indirectly affect the intrastate natural gas transportation business. Although the FERC has not made a formal determination with respect to all of its facilities they consider to be gathering facilities, Enable believes that its natural gas gathering pipelines meet the traditional tests that the FERC has used to determine that a pipeline is a gathering pipeline and are therefore not subject to FERC jurisdiction. The distinction between FERC-regulated transmission services and federally unregulated gathering services, however, has been the subject of substantial litigation, and the FERC determines whether facilities are gathering facilities on a case-by-case basis, so the classification and regulation of its gathering facilities is subject to change based on future determinations by the FERC, the courts or Congress. If the FERC were to consider the status of an individual facility and determine that the facility and/or services provided by it are not exempt from FERC regulation under the NGA and that the facility provides interstate service, the rates for, and terms and conditions of, services provided by such facility would be subject to regulation by the FERC under the NGA or the NGPA. Such regulation could decrease revenue, increase operating costs, and, depending upon the facility in question, could adversely affect Enable’s financial condition, results of operations and cash flows and our ability to make cash distributions to its unitholders. In addition, if any of its facilities were found to have provided services or otherwise operated in violation of the Natural Gas Act or Natural Gas Policy Act regulations, this could result in the imposition of substantial civil penalties, as well as a requirement to disgorge revenues collected for such services in excess of the maximum rates established by the FERC.
Natural gas gathering may receive greater regulatory scrutiny at the state level; therefore, Enable's natural gas gathering operations could be adversely affected should it become subject to the application of state regulation of rates and services. Enable’s gathering operations could also be subject to safety and operational regulations relating to the design, construction, testing, operation, replacement and maintenance of gathering facilities. The effect, if any, such changes might have on its operations cannot be predicted, but additional capital expenditures could be required and increased costs could be incurred depending on future legislative and regulatory changes.
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Enable may incur significant costs and liabilities resulting from pipeline integrity and other similar programs and related repairs.
The U.S. Department of Transportation has adopted regulations requiring pipeline operators to develop integrity management programs for transportation pipelines located in “high consequence areas,” which are those areas where a leak or rupture could do the most harm. The regulations require operators, including Enable, to, among other things:

• | develop a baseline plan to prioritize the assessment of a covered pipeline segment;

• | identify and characterize applicable threats that could impact a high consequence area;

• | improve data collection, integration, and analysis;

• | repair and remediate pipelines as necessary; and

• | implement preventive and mitigating action.

Although many of Enable's pipelines fall within a class that is currently not subject to these requirements, it may incur significant cost and liabilities associated with repair, remediation, preventive or mitigation measures associated with its non-exempt pipelines could be incurred. This work is part of its normal integrity management program and it does not expect to incur any extraordinary costs during 2013 or 2014 to complete the testing required by existing Department of Transportation regulations and its state counterparts. Costs have not been estimated for any repair, remediation, preventive or mitigation actions that may be determined to be necessary as a result of the testing program, which could be substantial, or any lost cash flows resulting from the shutting down of pipelines during the pendency of such repairs. Should Enable fail to comply with Department of Transportation or comparable state regulations, it could be subject to penalties and fines. Also, the scope of the integrity management program and other related pipeline safety programs could be expanded in the future. The cost of complying with such future requirements has not been estimated.
The adoption of financial reform legislation by the United States Congress could adversely affect Enable's ability to use derivative instruments to hedge risks associated with its business.
At times, Enable may hedge all or a portion of its commodity risk and its interest rate risk. The United States Congress adopted comprehensive financial reform legislation that changed federal oversight and regulation of the derivatives markets and entities, including businesses like Enable, that participate in those markets. The legislation, known as the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act, was signed into law by the President on July 21, 2010, and requires the Commodity Futures Trading Commission and the SEC to promulgate rules and regulations implementing the legislation. In its rulemaking under the Dodd-Frank Act, the Commodity Futures Trading Commission adopted regulations to set position limits for certain futures and option contracts in the major energy markets and for swaps that are their economic equivalents, but these rules were successfully challenged in federal district court by the Securities Industry Financial Markets Association and the International Swaps and Derivatives Association and largely vacated by the court. The Commodity Futures Trading Commission appealed this ruling, but subsequently withdrew its appeal. In December 2013, the Commodity Futures Trading Commission published a Notice of Proposed Rulemaking designed to implement new position limits regulation. The ultimate form and timing of the implementation of the regulatory regime affecting commodity derivatives remains uncertain. However, reporting obligations for transactions involving non-financial swap counterparties such as Enable began on July 1, 2013 with regard to interest rate swaps and August 19, 2013 with regard to other commodity swaps such as natural gas swap products.
Under final rules adopted by the Commodity Futures Trading Commission, Enable believes its hedging transactions will qualify for the non-financial, commercial end-user exception, which exempts derivatives intended to hedge or mitigate commercial risk from the mandatory swap clearing requirement, where the counterparty such as Enable has a required identification number, is not a financial entity as defined by the regulations, and meets a minimum asset test. The Dodd-Frank Act may also require Enable to comply with margin requirements in connection with its hedging activities, although the application of those provisions to Enable is uncertain at this time. The Dodd-Frank Act may also require the counterparties to its derivative instruments to spin off some of their hedging activities to a separate entity, which may not be as creditworthy as the current counterparty.
The Dodd-Frank Act and related regulations could significantly increase the cost of derivatives contracts for Enable's industry (including requirements to post collateral which could adversely affect our available liquidity), materially alter the terms of derivatives contracts, reduce the availability of derivatives to protect against risks Enable encounters, reduce its ability to monetize or restructure its existing derivatives contracts, and increase its exposure to less creditworthy counterparties, particularly if Enable is unable to utilize the commercial end user exception with respect to certain of its hedging transactions. If Enable reduces
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its use of hedging as a result of the legislation and regulations, its results of operations may become more volatile and its cash flows may be less predictable, which could adversely affect its ability to plan for and fund capital expenditures and fund unitholder distributions. Finally, the legislation was intended, in part, to reduce the volatility of crude oil and natural gas prices, which some legislators attributed to speculative trading in derivatives and commodity instruments related to crude oil and natural gas. Enable's revenues could therefore be adversely affected if a consequence of the legislation and regulations is to lower commodity prices. Any of these consequences could adversely affect its results of operations and its ability to make cash distributions to unitholders.
Item 1B. Unresolved Staff Comments.
None.
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Item 2. Properties.
OG&E
OG&E owns and operates an interconnected electric generation, transmission and distribution system, located in Oklahoma and western Arkansas, which included 10 generating stations with an aggregate capability of 6,845 MWs at December 31, 2014. The following tables set forth information with respect to OG&E's electric generating facilities, all of which are located in Oklahoma.

|  |  |  |  | 2014 Capacity Factor (A) |  | Unit Capability (MW) | Station Capability (MW)
|  | Year Installed |  | Fuel Capability |
Station & Unit |  | Unit Design Type |
Seminole | 1 | 1971 | Steam-Turbine | Gas | 6.7 | % |  | 492 |  |
| 1GT | 1971 | Combustion-Turbine | Gas | 0.1 | % | (B) | — |  |
| 2 | 1973 | Steam-Turbine | Gas | 7.0 | % |  | 500 |  |
| 3 | 1975 | Steam-Turbine | Gas/Oil | 9.2 | % |  | 498 |  | 1,490 |
Muskogee | 4 | 1977 | Steam-Turbine | Coal | 62.2 | % |  | 487 |  |
| 5 | 1978 | Steam-Turbine | Coal | 74.6 | % |  | 503 |  |
| 6 | 1984 | Steam-Turbine | Coal | 35.9 | % |  | 485 |  | 1,475 |
Sooner | 1 | 1979 | Steam-Turbine | Coal | 50.8 | % |  | 521 |  |
| 2 | 1980 | Steam-Turbine | Coal | 67.1 | % |  | 520 |  | 1,041 |
Horseshoe Lake | 6 | 1958 | Steam-Turbine | Gas/Oil | 13.0 | % |  | 166 |  |
| 7 | 1963 | Combined Cycle | Gas/Oil | 15.9 | % |  | 221 |  |
| 8 | 1969 | Steam-Turbine | Gas | 6.9 | % |  | 411 |  |
| 9 | 2000 | Combustion-Turbine | Gas | 9.9 | % | (B) | 46 |  |
| 10 | 2000 | Combustion-Turbine | Gas | 11.1 | % | (B) | 45 |  | 889 |
Redbud (C) | 1 | 2003 | Combined Cycle | Gas | 44.1 | % |  | 151 |  |
| 2 | 2003 | Combined Cycle | Gas | 61.8 | % |  | 153 |  |
| 3 | 2003 | Combined Cycle | Gas | 63.9 | % |  | 152 |  |
| 4 | 2003 | Combined Cycle | Gas | 51.1 | % |  | 151 |  | 607 |
Mustang | 1 | 1950 | Steam-Turbine | Gas | 4.8 | % | (B) | 51 |  |
| 2 | 1951 | Steam-Turbine | Gas | 5.1 | % | (B) | 51 |  |
| 3 | 1955 | Steam-Turbine | Gas | 8.7 | % |  | 117 |  |
| 4 | 1959 | Steam-Turbine | Gas | 10.6 | % |  | 257 |  |
| 5A | 1971 | Combustion-Turbine | Gas/Jet Fuel | 0.7 | % | (B) | 34 |  |
| 5B | 1971 | Combustion-Turbine | Gas/Jet Fuel | 0.8 | % | (B) | 33 |  | 543 |
McClain (D) | 1 | 2001 | Combined Cycle | Gas | 56.6 | % |  | 351 |  | 351 |
Total Generating Capability (all stations, excluding wind stations) | 6,396 |
|  |  |  |  |  | 2014 Capacity Factor (A) | Unit Capability (MW) | Station Capability (MW)
|  | Year Installed |  | Number of Units | Fuel Capability
Station |  | Location
Crossroads |  | 2011 | Canton, OK | 98 | Wind | 46.0 | % | 2.3 |  | 227.5 |
Centennial |  | 2007 | Laverne, OK | 80 | Wind | 36.0 | % | 1.5 |  | 120.0 |
OU Spirit |  | 2009 | Woodward, OK | 44 | Wind | 39.1 | % | 2.3 |  | 101.2 |
Total Generating Capability (wind stations) | 448.7 |

(A) | 2014 Capacity Factor = 2014 Net Actual Generation / (2014 Net Maximum Capacity (Nameplate Rating in MWs) x Period Hours (8,760 Hours)).

(B) | Peaking units are used when additional short-term capacity is required.

(C) | Represents OG&E's 51 percent ownership interest in the Redbud Plant.

(D) | Represents OG&E's 77 percent ownership interest in the McClain Plant.

At December 31, 2014, OG&E's transmission system included: (i) 53 substations with a total capacity of 13.0 million kilovolt-amps and 4,888 structure miles of lines in Oklahoma and (ii) seven substations with a total capacity of 2.4 million kilovolt-amps and 277 structure miles of lines in Arkansas. OG&E's distribution system included: (i) 354 substations with a total capacity of 9.7 million kilovolt-amps, 29,197 structure miles of overhead lines, 2,369 miles of underground conduit and 10,646 miles of
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underground conductors in Oklahoma and (ii) 31 substations with a total capacity of 1.0 million kilovolt-amps, 2,778 structure miles of overhead lines, 243 miles of underground conduit and 694 miles of underground conductors in Arkansas.
OG&E owns 140,133 square feet of office space at its executive offices at 321 North Harvey, Oklahoma City, Oklahoma 73102. In addition to its executive offices, OG&E owns numerous facilities throughout its service territory that support its operations. These facilities include, but are not limited to, service centers, fleet and equipment service facilities, operation support and other properties.
During the three years ended December 31, 2014, the Company's gross property, plant and equipment (excluding construction work in progress) additions were $2.3 billion and gross retirements were $273.7 million. These additions were provided by cash generated from operations, short-term borrowings (through a combination of bank borrowings and commercial paper), long-term borrowings and permanent financings. The additions during this three-year period amounted to 23.4 percent of gross property, plant and equipment (excluding construction work in progress) at December 31, 2014.
Item 3. Legal Proceedings.
In the normal course of business, the Company is confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other appropriate experts to assess the claim. If, in management's opinion, the Company has incurred a probable loss as set forth by GAAP, an estimate is made of the loss and the appropriate accounting entries are reflected in the Company's Consolidated Financial Statements. At the present time, based on currently available information, the Company believes that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to its financial statements and would not have a material adverse effect on the Company's consolidated financial position, results of operations or cash flows.
1. Patent Infringement Case. On September 16, 2011, TransData, Inc., a Texas corporation, sued OG&E in the Western District of Oklahoma, accusing OG&E of infringing three of their U.S. patents by using OG&E's General Electric "smart" meters with Silver Spring Networks wireless modules. The complaint seeks a judgment of infringement, unspecified damages, a permanent injunction, costs and attorneys fees. OG&E was served with the complaint on September 21, 2011 and has notified both General Electric and Silver Springs Network of the lawsuit and its intent to seek indemnity from those companies for any damages that it may incur from this lawsuit. TransData, Inc. sought to consolidate its OG&E lawsuit with similar lawsuits in the Eastern District of Texas, however, on December 13, 2011, the TransData, Inc. cases were consolidated in the Western District of Oklahoma. OG&E has filed a motion for extension of time to answer the complaint. On December 30, 2011, OG&E and General Electric agreed to terms for General Electric to provide OG&E with an unqualified defense in the matter and to indemnify OG&E for costs, expenses and damages awarded against OG&E subject to a reservation of rights. While the Company cannot predict the outcome of this lawsuit at this time, the Company intends to vigorously defend this action and believes that its ultimate resolution will not be material to the Company's consolidated financial position, results of operations or cash flows.
Item 4. Mine Safety Disclosures.
Not Applicable.
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PART II
Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
The Company's Common Stock is listed for trading on the New York Stock Exchange under the ticker symbol "OGE." Quotes may be obtained in daily newspapers where the common stock is listed as "OGE Engy" in the New York Stock Exchange listing table. The following table gives information with respect to price ranges, as reported in The Wall Street Journal as New York Stock Exchange Composite Transactions, and dividends paid for the periods shown.

| Dividend Paid | Price
2015 | High | Low
First Quarter (through February 20) | $ | 0.2500 |  | $ | 36.48 |  | $ | 32.92 |
2014 |  |  |
First Quarter | $ | 0.2250 |  | $ | 37.29 |  | $ | 32.91 |
Second Quarter | 0.2250 |  | 39.10 |  | 34.93 |
Third Quarter | 0.2250 |  | 39.28 |  | 34.88 |
Fourth Quarter | 0.2500 |  | 37.90 |  | 32.85 |
2013 |  |  |
First Quarter | $ | 0.2088 |  | $ | 35.08 |  | $ | 27.70 |
Second Quarter | 0.2088 |  | 36.59 |  | 32.20 |
Third Quarter | 0.2088 |  | 39.55 |  | 33.85 |
Fourth Quarter | 0.2088 |  | 40.00 |  | 32.85 |

At the Company's September 2014 Board meeting, the Board of Directors approved management's recommendation of an 11 percent increase in the quarterly dividend rate to $0.2500 per share from $0.22500 per share effective in October 2014.
The number of record holders of the Company's Common Stock at December 31, 2014, was 16,957. The book value of the Company's Common Stock at December 31, 2014 was $16.27.
Dividend Restrictions
Before the Company can pay any dividends on its common stock, the holders of any of its preferred stock that may be outstanding are entitled to receive their dividends at the respective rates as may be provided for the shares of their series. Currently, there are no shares of preferred stock of the Company outstanding. Because the Company is a holding company and conducts all of its operations through its subsidiaries and equity affiliates, the Company's cash flow and ability to pay dividends will be dependent on the earnings and cash flows of its subsidiaries and equity affiliates and the distribution or other payment of those earnings to the Company in the form of dividends or distributions, or in the form of repayments of loans or advances to it. The Company expects to derive principally all of the funds required by it to enable it to pay dividends on its common stock from dividends paid by OG&E, on OG&E's common stock, and from distributions paid by Enable. The Company's ability to receive dividends on OG&E's common stock is subject to the prior rights of the holders of any OG&E preferred stock that may be outstanding, any covenants of OG&E's certificate of incorporation and OG&E's debt instruments limiting the ability of OG&E to pay dividends and the ability of public utility commissions that regulate OG&E to effectively restrict the payment of dividends by OG&E. The Company's ability to receive distributions on its limited partnership interest in Enable is subject to Enable's cash available for distribution, the terms of its limited partnership agreement, and the covenants of Enable's debt instruments limiting the ability of Enable to pay distributions. Enable's partnership agreement requires that it distribute all "available cash", as defined as cash on hand at the end of a quarter after the payment of expenses and the establishment of cash reserves, and cash on hand resulting from working capital borrowings made after the end of the quarter.
Pursuant to the leverage restriction in the Company’s revolving credit agreement, the Company must maintain a percentage of debt to total capitalization at a level that does not exceed 65 percent. The payment of cash dividends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $452.6 million of the Company’s retained earnings from being paid out in dividends. Accordingly, approximately $1.7 billion of the Company’s retained earnings as of December 31, 2014 are unrestricted for the payment of dividends.
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Pursuant to the Federal Power Act, OG&E is restricted from paying dividends from its capital accounts. Dividends are paid from retained earnings. Pursuant to the leverage restriction in OG&E’s revolving credit agreement, OG&E must also maintain a percentage of debt to total capitalization at a level that does not exceed 65 percent. The payment of cash dividends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $412.2 million of OG&E’s retained earnings from being paid out in dividends. Accordingly, approximately $1.6 billion of OG&E’s retained earnings as of December 31, 2014 are unrestricted for the payment of dividends.
Issuer Purchases of Equity Securities
The following table contains information about the Company's purchases of its common stock during the fourth quarter of 2014.

Period | Total Number of Shares Purchased |  | Average Price Paid Per Share | Total Number of Shares Purchased as Part of Publicly Announced Plan | Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plan
10/1/14 - 10/31/14 | — |  | $ | — |  | N/A | N/A
11/1/14 - 11/30/14 | 576 | (A) | $ | 36.34 |  | N/A | N/A
12/1/14 - 12/31/14 | — |  | $ | — |  | N/A | N/A

(A) | These shares of restricted stock were returned to the Company to satisfy tax liabilities.

N/A – not applicable
44

Item 6. Selected Financial Data
HISTORICAL DATA

Year ended December 31 | 2014 | 2013 | 2012 | 2011 | 2010
SELECTED FINANCIAL DATA |  |  |  |  |
(In millions, except per share data) |  |  |  |  |
Results of Operations Data: |  |  |  |  |
Operating revenues | $ | 2,453.1 |  | $ | 2,867.7 |  | $ | 3,671.2 |  | $ | 3,915.9 |  | $ | 3,716.9 |
Cost of sales | 1,106.6 |  | 1,428.9 |  | 1,918.7 |  | 2,277.9 |  | 2,187.4 |
Operating expenses | 809.7 |  | 885.3 |  | 1,075.6 |  | 991.3 |  | 935.6 |
Operating income | 536.8 |  | 553.5 |  | 676.9 |  | 646.7 |  | 593.9 |
Equity in earnings of unconsolidated affiliates | 172.6 |  | 101.9 |  | — |  | — |  | — |
Allowance for equity funds used during construction | 4.2 |  | 6.6 |  | 6.2 |  | 20.4 |  | 11.4 |
Other income | 17.8 |  | 31.8 |  | 17.6 |  | 19.8 |  | 13.7 |
Other expense | 14.4 |  | 22.2 |  | 16.5 |  | 21.7 |  | 17.9 |
Interest expense | 148.4 |  | 147.5 |  | 164.1 |  | 140.9 |  | 139.7 |
Income tax expense | 172.8 |  | 130.3 |  | 135.1 |  | 160.7 |  | 161.0 |
Net income | 395.8 |  | 393.8 |  | 385.0 |  | 363.6 |  | 300.4 |
Less: Net income attributable to noncontrolling interests | — |  | 6.2 |  | 30.0 |  | 20.7 |  | 5.1 |
Net income attributable to OGE Energy | $ | 395.8 |  | $ | 387.6 |  | $ | 355.0 |  | $ | 342.9 |  | $ | 295.3 |
Basic earnings per average common share attributable to OGE Energy common shareholders | $ | 1.99 |  | $ | 1.96 |  | $ | 1.80 |  | $ | 1.75 |  | $ | 1.51 |
Diluted earnings per average common share attributable to OGE Energy common shareholders | $ | 1.98 |  | $ | 1.94 |  | $ | 1.79 |  | $ | 1.73 |  | $ | 1.49 |
Dividends declared per common share | $ | 0.95000 |  | $ | 0.85125 |  | $ | 0.79750 |  | $ | 0.75875 |  | $ | 0.73125 |
Balance Sheet Data (at period end): |  |  |  |  |
Property, plant and equipment, net | $ | 6,979.9 |  | $ | 6,672.8 |  | $ | 8,344.8 |  | $ | 7,474.0 |  | $ | 6,464.4 |
Total assets | $ | 9,527.8 |  | $ | 9,134.7 |  | $ | 9,922.2 |  | $ | 8,906.0 |  | $ | 7,669.1 |
Long-term debt | $ | 2,755.3 |  | $ | 2,400.1 |  | $ | 2,848.6 |  | $ | 2,737.1 |  | $ | 2,362.9 |
Total stockholders' equity | $ | 3,244.4 |  | $ | 3,037.1 |  | $ | 3,072.4 |  | $ | 2,819.3 |  | $ | 2,400.0 |
Capitalization Ratios (A) |  |  |  |  |
Stockholders' equity | 54.1 | % | 55.9 | % | 51.9 | % | 50.7 | % | 50.4 | %
Long-term debt | 45.9 | % | 44.1 | % | 48.1 | % | 49.3 | % | 49.6 | %
Ratio of Earnings to Fixed Charges (B) |  |  |  |  |
Ratio of earnings to fixed charges | 4.49 |  | 3.98 |  | 3.94 |  | 4.12 |  | 4.02 |

(A) | Capitalization ratios = [Total stockholders' equity / (Total stockholders' equity + Long-term debt + Long-term debt due within one year)] and [(Long-term debt + Long-term debt due within one year) / (Total stockholders' equity + Long-term debt + Long-term debt due within one year)].

(B) | For purposes of computing the ratio of earnings to fixed charges, (i) earnings consist of income from continuing operations before income taxes and equity in earnings of unconsolidated affiliates, plus distributed equity income plus fixed charges, less allowance for borrowed funds used during construction and other capitalized interest and (ii) fixed charges consist of interest on long-term debt, related amortization, interest on short-term borrowings and a calculated portion of rents considered to be interest.

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Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.
Introduction
The Company is an energy and energy services provider offering physical delivery and related services for both electricity and natural gas primarily in the south central United States. The Company conducts these activities through two business segments: (i) electric utility and (ii) natural gas midstream operations. The accounts of OGE Energy and its wholly owned and majority owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation. OGE Energy generally uses the equity method of accounting for investments where its ownership interest is between 20% and 50% and has the ability to exercise significant influence.
The electric utility segment generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are conducted through OG&E and are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory, and is a wholly owned subsidiary of the Company. OG&E is the largest electric utility in Oklahoma and its franchised service territory includes the Fort Smith, Arkansas area. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business.
The natural gas midstream operations segment currently represents the Company's investment in Enable through its wholly owned subsidiary OGE Holdings. Enable is engaged in the business of gathering, processing, transporting and storing natural gas. Enable's natural gas gathering and processing assets are strategically located in four states and serve natural gas production from shale developments in the Anadarko, Arkoma and Ark-La-Tex basins. Enable also owns an emerging crude oil gathering business in the Bakken shale formation, principally located in the Williston basin. Enable's natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois. For periods prior to the formation of Enable, the natural gas midstream operations segment reflected the consolidated results of Enogex Holdings.
Enable was formed effective May 1, 2013 by OGE Energy, the ArcLight group and CenterPoint Energy, Inc. to own and operate the midstream businesses of OGE Energy and CenterPoint. In the formation transaction, OGE Energy and ArcLight contributed Enogex LLC to Enable and the Company deconsolidated its previously held investment in Enogex Holdings and acquired an equity interest in Enable. The Company's contribution of Enogex LLC to Enable met the requirements of being in substance real estate and was recorded at historical cost. The general partner of Enable is equally controlled by CenterPoint and OGE Energy, who each have 50 percent management ownership. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, OGE Energy began accounting for its interest in Enable using the equity method of accounting.
On April 16, 2014, Enable completed an initial public offering of 25,000,000 common units resulting in Enable becoming a publicly traded Master Limited Partnership. The offering represented approximately 6.0 percent of the limited partner interests and raised approximately $464 million in net proceeds for Enable. In connection with the offering, underwriters exercised their option to purchase 3,750,000 additional common units which were fulfilled with units held by ArcLight. As a result of the offering, OGE Holding's ownership was reduced from 28.5 percent to 26.7 percent. In connection with Enable’s initial public offering, approximately 61.4 percent of OGE Holdings and CenterPoint’s common units were converted into subordinated units. As a result, following the initial public offering, OGE Holdings owned 42,832,291 common units and 68,150,514 subordinated units of Enable.
On May 13, 2014, CenterPoint exercised its put right with respect to a 24.95 percent interest in SESH and pursuant to that right, on May 30, 2014, Enable issued 6,322,457 common units representing limited partner interests in Enable in exchange for CenterPoint's 24.95 percent interest in SESH. At December 31, 2014, OGE Energy held 26.3 percent of the limited partner interests in Enable.
On January 26, 2015, Enable announced a quarterly dividend distribution of $0.30875 per unit on its outstanding common and subordinated units, representing an increase of approximately 2.1 percent over the prior quarter distribution. Enable's gross margins are affected by commodity price movements. Based on forward commodity prices, Enable expects to see a change in producer activity that will affect its future distribution growth rate. If cash distributions to Enable’s unitholders exceed $0.330625 per unit in any quarter, the general partner will receive increasing percentages, up to 50 percent, of the cash Enable distributes in excess of that amount. OGE Holdings is entitled to 60 percent of those “incentive distributions.”
OG&E began participating in the SPP Integrated Marketplace effective March 1, 2014. The SPP Integrated Marketplace replaced the SPP Energy Imbalance Services market. As part of the Integrated Marketplace, the SPP assumed balancing authority responsibilities for its market participants. The SPP Integrated Marketplace functions as a centralized dispatch, where market
46

participants, including OG&E, submit offers to sell power to the SPP from their resources and bid to purchase power from the SPP for their customers. The SPP Integrated Marketplace is intended to allow the SPP to optimize supply offers and demand bids based upon reliability and economic considerations, and determine which generating units will run at any given time for maximum cost-effectiveness. As a result, OG&E's generating units may produce output that differs from OG&E's customer load requirements. Net fuel and purchased power costs are recovered through fuel adjustment clauses.
Overview
Company Strategy
The Company's mission, through OG&E and its equity interest in Enable, is to fulfill its critical role in the nation's electric utility and natural gas midstream pipeline infrastructure and meet individual customers' needs for energy and related services focusing on safety, efficiency, reliability, customer service and risk management. The Company's corporate strategy is to continue to maintain its existing business mix and diversified asset position of its regulated electric utility business and interest in a publicly traded midstream company, while providing competitive energy products and services to customers as well as seeking growth opportunities in both businesses.
OG&E is focused on:

• | Providing exceptional customer experiences by continuing to improve customer interfaces, tools, products and services that deliver high customer satisfaction and operating productivity.

• | Providing safe, reliable energy to the communities and customers we serve. A particular focus is on enhancing the value of the grid by improving distribution grid reliability by reducing the frequency and duration of customer interruptions and leveraging previous grid technology investments.

• | Maintaining strong regulatory and legislative relationships for the long-term benefit of our customers, investors and members.

• | Continuing to grow a zero-injury culture and deliver top-quartile safety results.

• | Expanding transmission investments beyond traditional opportunities.

• | Executing on the Company’s Environmental Compliance Plan.

• | Ensuring we have the necessary mix of generation resources to meet the long term needs of our customers.

• | Continuing focus on operational excellence and efficiencies in order to protect the customer bill.

Additionally, the Company wants to achieve a premium valuation of its businesses relative to its peers, grow earnings per share with a stable earnings pattern, create a high performance culture and achieve desired outcomes with target stakeholders. The Company's financial objectives include a long-term annual earnings growth rate for OG&E of three to five percent on a weather-normalized basis, maintaining a strong credit rating as well as targeting dividend increases of approximately 10 percent annually through 2019. The targeted annual dividend increase has been determined after consideration of numerous factors, including the largely retail composition of the Company's shareholder base, the Company's financial position, the Company's growth targets and the composition of the Company's assets and investment opportunities. The Company also relies on cash distributions from its investment in Enable to fund its capital needs and support future dividend growth. The cash distributions from Enable are expected to grow 3 percent to 7 percent in 2015 from the fourth quarter 2014 distribution. The Company believes it can accomplish these financial objectives by, among other things, pursuing multiple avenues to build its business, maintaining a diversified asset position, continuing to develop a wide range of skills to succeed with changes in its industries, providing products and services to customers efficiently, managing risks effectively and maintaining strong regulatory and legislative relationships.
Summary of Operating Results
2014 compared to 2013. Net income attributable to OGE Energy was $395.8 million, or $1.98 per diluted share, in 2014 as compared to $387.6 million, or $1.94 per diluted share, in 2013. The increase in net income attributable to OGE Energy of $8.2 million, or 2.1 percent, or $0.04 per diluted share, in 2014 as compared to 2013 was primarily due to:

• | an increase in net income at OGE Holdings of $2.4 million, or 2.4 percent, or $0.01 per diluted share of the Company's common stock, due partially to the accretive effect to OGE Holdings of Enable partially offset by a reduction in deferred state income taxes in 2013 associated with a remeasurement of the accumulated deferred taxes related to the formation of Enable;

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• | an increase in net income at OGE Energy of $6.4 million, or $0.04 per diluted share of the Company's common stock, primarily due to decreased transaction expenses related to the formation of Enable and a decrease in losses for the deferred compensation plan; and

• | a decrease in net income at OG&E of $0.6 million, or 0.2 percent, or $0.01 per diluted share of the Company's common stock, reflecting an increase in depreciation expense due to additional assets being placed in service in 2014, a decrease in gross margin related to milder weather compared to 2013, an increase in other operation and maintenance expense and an increase in interest expense related to the issuance of debt. Partially offsetting these items was an increase in wholesale transmission revenues, an increase in customer growth and a decrease in incentive compensation.

2013 compared to 2012. Net income attributable to OGE Energy was $387.6 million, or $1.94 per diluted share, in 2013 as compared to $355.0 million, or $1.79 per diluted share, in 2012. The increase in net income attributable to OGE Energy of $32.6 million, or 9.2 percent, or $0.15 per diluted share, in 2013 as compared to 2012 was primarily due to:

• | an increase in net income at OG&E of $12.3 million, or 4.4 percent, or $0.06 per diluted share of the Company's common stock, driven by higher gross margin primarily related to increased wholesale transmission revenue and lower other operation and maintenance expense, partially offset by higher interest expense related to the issuance of debt in May 2013;

• | an increase in net income at OGE Holdings of $25.8 million, or 34.8 percent, or $0.13 per diluted share of the Company's common stock, due partially to the accretive effect to OGE Holdings of its investment in Enable since May 1, 2013 and a reduction in deferred state income taxes, associated with a remeasurement of the accumulated deferred taxes related to the formation of Enable. Also contributing to the increase was the performance of Enogex for the first four months of 2013. Compared to the same period of 2012, earnings were higher for Enogex due to increased gathering rates and volumes and inlet processing volumes associated with its expansion projects and gas gathering assets acquired in August 2012. These increases were partially offset by lower NGLs prices, lower keep-whole processing spreads and the contract conversion of the Texas production volumes of one of Enogex's five largest customers from keep-whole to fixed-fee; and

• | a decrease in net income at OGE Energy of $5.5 million, or $0.04 per diluted share of the Company's common stock, primarily due to transaction expenses related to the formation of Enable as discussed in Note 3 of Notes to Condensed Consolidated Financial Statements.

A more detailed discussion regarding the financial performance of OG&E and the Natural Gas Midstream Operations can be found under "Results of Operations" below.
2015 Outlook
Key assumptions for 2015 include:
OG&E
The Company projects OG&E to earn approximately $282 million to $298 million, or $1.41 to $1.49 per average diluted share in 2015 and is based on the following assumptions:

• | Normal weather patterns are experienced for the remainder of the year;

• | Gross margin on revenues of approximately $1.375 billion to $1.385 billion based on sales growth of approximately 1 percent on a weather-adjusted basis;

• | Approximately $114 million of gross margin is primarily attributed to regionally allocated transmission projects;

• | Operating expenses of approximately $844 million to $861 million, with operation and maintenance expenses comprising 54 percent of the total;

• | Interest expense of approximately $146 million which assumes a $5 million allowance for borrowed funds used during construction reduction to interest expense;

• | Other income of approximately $17 million including approximately $9 million of allowance for equity funds used during construction; and

• | An effective tax rate of approximately 27 percent.

OG&E has significant seasonality in its earnings. OG&E typically shows minimal earnings in the first and fourth quarters with a majority of earnings in the third quarter due to the seasonal nature of air conditioning demand.
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Gross Margin is defined by OG&E as operating revenues less fuel, purchased power and certain transmission expenses. Gross margin is a non-GAAP financial measure because it excludes depreciation and amortization, and other operation and maintenance expenses. Expenses for fuel and purchased power are recovered through fuel adjustment clauses and as a result changes in these expenses are offset in operating revenues with no impact on net income. OG&E believes gross margin provides a more meaningful basis for evaluating its operations across periods than operating revenues because gross margin excludes the revenue effect of fluctuations in these expenses. Gross margin is used internally to measure performance against budget and in reports for management and the Board of Directors. OG&E's definition of gross margin may be different from similar terms used by other companies.
Reconciliation of gross margin to revenue:

| Twelve Months Ended
(Dollars in Millions) | December 31, 2015 (A)
Operating revenues | $ | 2,188 |
Cost of sales | 808 |
Gross Margin | $ | 1,380 |

(A) | Based on the midpoint of OG&E earnings guidance for 2015.

OGE Enogex Holdings LLC
The Company projects cash distributions from its ownership interest in Enable Midstream to be between approximately $139 million to $142 million, and the earnings contribution to be approximately $70 million to $80 million or $0.35 to $0.40 per average diluted share.
Consolidated OGE
The Company’s 2015 earnings guidance is between approximately $352 million and $378 million of net income, or $1.76 to $1.89 per average diluted share and is based on the following assumptions:

• | Approximately 200 million average diluted shares outstanding;

• | An effective tax rate of approximately 29 percent.

Results of Operations
The following discussion and analysis presents factors that affected the Company's consolidated results of operations for the years ended December 31, 2014, 2013 and 2012 and the Company's consolidated financial position at December 31, 2014 and 2013. The following information should be read in conjunction with the Consolidated Financial Statements and Notes thereto. Known trends and contingencies of a material nature are discussed to the extent considered relevant.

Year ended December 31 (In millions except per share data) | 2014 | 2013 | 2012
Net income attributable to OGE Energy | $ | 395.8 |  | $ | 387.6 |  | $ | 355.0 |
Basic average common shares outstanding | 199.2 |  | 198.2 |  | 197.1 |
Diluted average common shares outstanding | 199.9 |  | 199.4 |  | 198.1 |
Basic earnings per average common share attributable to OGE Energy common shareholders | $ | 1.99 |  | $ | 1.96 |  | $ | 1.80 |
Diluted earnings per average common share attributable to OGE Energy common shareholders | $ | 1.98 |  | $ | 1.94 |  | $ | 1.79 |
Dividends declared per common share | $ | 0.95000 |  | $ | 0.85125 |  | $ | 0.79750 |

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Results by Business Segment

Year ended December 31 (In millions) | 2014 | 2013 | 2012
Net Income attributable to OGE Energy |  |  |
OG&E (Electric Utility) | $ | 292.0 |  | $ | 292.6 |  | $ | 280.3 |
OGE Holdings (Natural Gas Midstream Operations) | 102.3 |  | 99.9 |  | 74.1 |
Other Operations (A) | 1.5 |  | (4.9 | ) | 0.6 |
Consolidated net income attributable to OGE Energy | $ | 395.8 |  | $ | 387.6 |  | $ | 355.0 |

(A) | Other Operations primarily includes the operations of the holding company and consolidating eliminations.

The following operating results analysis by business segment includes intercompany transactions that are eliminated in the Consolidated Financial Statements.
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OG&E (Electric Utility)

Year ended December 31 (Dollars in millions) | 2014 | 2013 | 2012
Operating revenues | $ | 2,453.1 |  | $ | 2,262.2 |  | $ | 2,141.2 |
Cost of sales | 1,106.6 |  | 965.9 |  | 879.1 |
Other operation and maintenance | 453.2 |  | 438.8 |  | 446.3 |
Depreciation and amortization | 270.8 |  | 248.4 |  | 248.7 |
Taxes other than income | 84.5 |  | 83.8 |  | 77.7 |
Operating income | 538.0 |  | 525.3 |  | 489.4 |
Allowance for equity funds used during construction | 4.2 |  | 6.6 |  | 6.2 |
Other income | 4.8 |  | 8.1 |  | 8.2 |
Other expense | 1.9 |  | 4.6 |  | 4.3 |
Interest expense | 141.5 |  | 129.3 |  | 124.6 |
Income tax expense | 111.6 |  | 113.5 |  | 94.6 |
Net income | $ | 292.0 |  | $ | 292.6 |  | $ | 280.3 |
Operating revenues by classification |  |  |
Residential | $ | 925.5 |  | $ | 901.4 |  | $ | 878.0 |
Commercial | 583.3 |  | 554.2 |  | 523.5 |
Industrial | 224.5 |  | 220.6 |  | 206.8 |
Oilfield | 188.3 |  | 176.4 |  | 163.4 |
Public authorities and street light | 220.3 |  | 214.3 |  | 202.4 |
Sales for resale | 52.9 |  | 59.4 |  | 54.9 |
System sales revenues | 2,194.8 |  | 2,126.3 |  | 2,029.0 |
Off-system sales revenues | 94.1 |  | 14.7 |  | 36.5 |
Other | 164.2 |  | 121.2 |  | 75.7 |
Total operating revenues | $ | 2,453.1 |  | $ | 2,262.2 |  | $ | 2,141.2 |
Reconciliation of gross margin to revenue: |  |  |
Operating revenues | $ | 2,453.1 |  | $ | 2,262.2 |  | $ | 2,141.2 |
Cost of sales | 1,106.6 |  | 965.9 |  | 879.1 |
Gross Margin | $ | 1,346.5 |  | $ | 1,296.3 |  | $ | 1,262.1 |
MWH sales by classification (In millions) |  |  |
Residential | 9.4 |  | 9.4 |  | 9.1 |
Commercial | 7.2 |  | 7.1 |  | 7.0 |
Industrial | 3.8 |  | 3.9 |  | 4.0 |
Oilfield | 3.4 |  | 3.4 |  | 3.3 |
Public authorities and street light | 3.2 |  | 3.2 |  | 3.3 |
Sales for resale | 1.0 |  | 1.2 |  | 1.3 |
System sales | 28.0 |  | 28.2 |  | 28.0 |
Off-system sales | 2.2 |  | 0.4 |  | 1.4 |
Total sales | 30.2 |  | 28.6 |  | 29.4 |
Number of customers | 814,982 |  | 806,940 |  | 798,110 |
Weighted-average cost of energy per kilowatt-hour - cents |  |  |
Natural gas | 4.506 |  | 3.905 |  | 2.930 |
Coal | 2.152 |  | 2.273 |  | 2.310 |
Total fuel | 2.752 |  | 2.784 |  | 2.437 |
Total fuel and purchased power | 3.493 |  | 3.178 |  | 2.806 |
Degree days (A) |  |  |
Heating - Actual | 3,569 |  | 3,673 |  | 2,667 |
Heating - Normal | 3,349 |  | 3,349 |  | 3,349 |
Cooling - Actual | 2,114 |  | 2,106 |  | 2,561 |
Cooling - Normal | 2,092 |  | 2,092 |  | 2,092 |

(A) | Degree days are calculated as follows: The high and low degrees of a particular day are added together and then averaged. If the calculated average is above 65 degrees, then the difference between the calculated average and 65 is expressed as cooling degree days, with each degree of difference equaling one cooling degree day. If the calculated average is below 65 degrees, then the difference between the calculated average and 65 is expressed as heating degree days, with each degree of difference equaling one heating degree day. The daily calculations are then totaled for the particular reporting period.

51

2014 compared to 2013. OG&E's net income decreased 0.6 million, or 0.2 percent, in 2014 as compared to 2013 primarily due to higher gross margin, which was almost offset by higher other operations and maintenance expense, higher depreciation and amortization expense, and interest expense.
Gross Margin
Gross Margin is defined by OG&E as operating revenues less fuel, purchased power and certain transmission expenses. Gross margin is a non-GAAP financial measure because it excludes depreciation and amortization, and other operation and maintenance expenses. Expenses for fuel and purchased power are recovered through fuel adjustment clauses and as a result changes in these expenses are offset in operating revenues with no impact on net income. OG&E believes gross margin provides a more meaningful basis for evaluating its operations across periods than operating revenues because gross margin excludes the revenue effect of fluctuations in these expenses. Gross margin is used internally to measure performance against budget and in reports for management and the Board of Directors. OG&E's definition of gross margin may be different from similar terms used by other companies.
Operating revenues were $2,453.1 million in 2014 as compared to $2,262.2 million in 2013, an increase of $190.9 million, or 8.4 percent. Cost of sales were $1,106.6 million in 2014 as compared to $965.9 million in 2013, an increase of $140.7 million, or 14.6 percent. Gross margin was $1,346.5 million in 2014 as compared to $1,296.3 million in 2013, an increase of $50.2 million, or 3.9 percent. The below factors contributed to the change in gross margin:

| $ Change
| (In millions)
Wholesale transmission revenue (A) | $ | 43.8 |
New customer growth | 13.8 |
Price variance (B) | 6.8 |
Non-residential demand and related revenues | 1.4 |
Other | (1.7 | )
Quantity variance (primarily weather) | (13.9 | )
Change in gross margin | $ | 50.2 |

(A) | Increased primarily due to higher investments related to certain FERC approved transmission projects included in formula rates.

(B) | Increased due to higher rider revenues primarily from the Oklahoma Demand Program rider, the Oklahoma Storm Recovery rider and the Arkansas Demand Program rider partially offset by lower rider revenues from the Oklahoma Crossroads rider, Oklahoma Smart Grid rider, Oklahoma System Hardening rider and the Arkansas Crossroads rider.

Cost of sales for OG&E consists of fuel used in electric generation, purchased power and transmission related charges. Fuel expense was $627.5 million in 2014 as compared to $672.7 million in 2013, a decrease of $45.2 million, or 6.7 percent, primarily due to lower natural gas used offset by higher natural gas prices. In 2014, OG&E's fuel mix was 61 percent coal, 32 percent natural gas and seven percent wind. In 2013, OG&E's fuel mix was 53 percent coal, 40 percent natural gas and seven percent wind. Purchased power costs were $444.1 million in 2014 as compared to $267.6 million in 2013, an increase of $176.5 million, or 66.0 percent, primarily due to an increase in purchases from the SPP, reflecting the impact of OG&E's participation in the SPP Integrated Market, which began on March 1, 2014. Transmission related charges were $35.0 million in 2014 as compared to $25.6 million in 2013, an increase of $9.4 million, or 36.7 percent, primarily due to higher SPP charges for the base plan projects of other utilities.
The actual cost of fuel used in electric generation and certain purchased power costs are passed through to OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC, the APSC and the FERC. The OCC, the APSC and the FERC have authority to review the appropriateness of gas transportation charges or other fees OG&E pays to its affiliate, Enable.
52

Operating Expenses
Other operation and maintenance expenses were $453.2 million in 2014 as compared to $438.8 million in 2013, an increase of $14.4 million, or 3.3 percent. The below factors contributed to the change in other operations and maintenance expense:

| $ Change
| (In millions)
Reduction in capitalized labor (A) | $ | 11.4 |
Corporate overhead and allocations (B) | 4.0 |
Contract professional services (primarily marketing services) | 3.8 |
Ongoing maintenance at power plants | 3.5 |
Other marketing, sales and commercial (C) | 2.3 |
Software expense (D) | 2.3 |
Fees, permits and licenses (E) | 2.3 |
Vegetation management (F) | (4.5 | )
Employee benefits (G) | (4.9 | )
Salaries and wages (H) | (5.8 | )
Change in other operation and maintenance expense | $ | 14.4 |

(A) | Portion of labor costs capitalized into projects decreased as a result of less work performed on storm restoration.

(B) | Increased primarily due to higher allocated costs from the holding company resulting from the formation of Enable during 2013.

(C) | Increased primarily due to demand side management customer payments which are recovered through a rider partially offset by a reduction in media services expense.

(D) | Increased as a result of higher expenditures related to Smart Grid software.

(E) | Increased primarily due to higher SPP administration and assessment fees.

(F) | Decreased primarily due to increased spending on system hardening in 2013 which includes costs that are being recovered through a rider.

(G) | Decreased primarily due to lower pension expense, postretirement and other benefits.

(H) | Decreased primarily due to incentive compensation and lower overtime wages partially offset by higher regular salaries and wages.

Depreciation and amortization expense was $270.8 million in 2014 as compared to $248.4 million in 2013, an increase of $22.4 million, or 9.0 percent, primarily due to additional assets being placed in service primarily related to transmission lines being placed in service throughout 2013 and 2014, along with an increase resulting from the amortization of the deferred pension credits regulatory liability which was fully amortized in July 2014. These were offset by the pension regulatory asset which was fully amortized in July 2013.
Additional Information
Allowance for Equity Funds Used During Construction. Allowance for equity funds used during construction was $4.2 million in 2014 as compared to $6.6 million in 2013, a decrease of $2.4 million or 36.4 percent, primarily due to lower construction work in progress balances resulting from transmission projects being placed in service in 2014.
Other Income. Other income was $4.8 million in 2014 as compared to $8.1 million in 2013, a decrease of $3.3 million or 40.7 percent, primarily due to decreased margins recognized in the guaranteed flat bill program during 2014 as a result of cooler weather in the first quarter as compared to the same period in 2013 along with a decrease in the tax gross up related to the allowance for equity funds used during construction.
Other Expense. Other expense was $1.9 million in 2014 as compared to $4.6 million in 2013, a decrease of $2.7 million or 58.7 percent, primarily due to decreased charitable donations during 2014.
Interest Expense. Interest expense was $141.5 million in 2014 as compared to $129.3 million in 2013, an increase of $12.2 million, or 9.4 percent, primarily due to a $9.1 million increase in interest on long term debt related to a $250 million debt issuance that occurred in May 2013, a $250 million debt issuance that occurred in March 2014 and an additional $250 million debt issuance that occurred in December 2014 partially offset by the early redemption of $140 million senior notes in August
53

2014. In addition, there was a $2.0 million increase reflecting a reduction in 2013 interest expense related to tax matters offset by a decrease in the allowance for borrowed funds used during construction of $1.0 million.
Income Tax Expense. Income tax expense was $111.6 million in 2014 as compared to $113.5 million in 2013, a decrease of $1.9 million, or 1.7 percent. The reduction reflects lower pretax income partially offset by a reduction in state tax credits recognized during the year and an increase in Federal credits recognized.
2013 compared to 2012. OG&E's net income increased $12.3 million, or 4.4 percent, in 2013 as compared to 2012 primarily due to higher gross margin and lower other operations and maintenance expense, offset in part by higher interest expense and income taxes.
Gross Margin
Operating revenues were $2,262.2 million in 2013 as compared to $2,141.2 million in 2012, an increase of $121.0 million, or 5.7 percent. Cost of sales were $965.9 million in 2013 as compared to $879.1 million in 2012, an increase of $86.8 million, or 9.9 percent. Gross margin was $1,296.3 million in 2013 as compared to $1,262.1 million in 2012, an increase of $34.2 million, or 2.7 percent. The below factors contributed to the change in gross margin:

| $ Change
| (In millions)
Wholesale transmission revenue (A) | $ | 44.9 |
New customer growth | 10.9 |
Other | 1.8 |
Non-residential demand and related revenues | 0.1 |
Quantity variance (primarily weather) | (6.4 | )
Price variance (B) | (17.1 | )
Change in gross margin | $ | 34.2 |

(A) | Increased primarily due to higher investments related to certain FERC approved transmission projects included in formula rates.

(B) | Decreased primarily due to sales and customer mix.

Cost of sales for OG&E consists of fuel used in electric generation, purchased power and transmission related charges. Fuel expense was $672.7 million in 2013 as compared to $642.4 million in 2012, an increase of $30.3 million, or 4.7 percent, primarily due to higher natural gas prices. OG&E's electric generating capability is fairly evenly divided between coal and natural gas and provides for flexibility to use either fuel to the best economic advantage for OG&E and its customers. In 2013, OG&E's fuel mix was 53 percent coal, 40 percent natural gas and seven percent wind. In 2012, OG&E's fuel mix was 52 percent coal, 42 percent natural gas and six percent wind. Purchased power costs were $267.6 million in 2013 as compared to $223.0 million in 2012, an increase of $44.6 million, or 20.0 percent, primarily due to an increase in purchases in the energy imbalance service market and short-term power agreements. Transmission related charges were $25.6 million in 2013 as compared to $13.7 million in 2012, an increase of $11.9 million, or 86.9 percent, primarily due to higher SPP charges for the base plan projects of other utilities.
54

Operating Expenses
Other operation and maintenance expenses were $438.8 million in 2013 as compared to $446.3 million in 2012, a decrease of $7.5 million, or 1.7 percent. The below factors contributed to the change in other operations and maintenance expense:

| $ Change
| (In millions)
Employee benefits (A) | $ | (12.3 | )
Total salaries and wages (B) | (6.5 | )
Temporary labor | (2.3 | )
Contract professional services (primarily smart grid) (C) | (1.7 | )
Other | 0.6 |
Other marketing and sales expense (primarily lower demand-side management initiatives) (C) | 1.2 |
Administrative and assessment fees (primarily SPP Administration Fees) | 2.2 |
Software expense (primarily smart grid) (C) | 2.7 |
Capitalized labor | 8.6 |
Change in other operation and maintenance expense | $ | (7.5 | )

(A) | Decreased primarily due to lower recoverable amounts of pension expense and postretirement medical expense allowed in the August 2012 rate case, a decrease in medical expense, and a decrease in worker's compensation accruals.

(B) | Decreased primarily due to lower salaries and wages as a result of lower headcount in 2013 and a decrease in incentive pay, partially offset by annual salary increases and an increase in overtime wages related to 2013 storms.

(C) | Includes costs that are being recovered through a rider.

Depreciation and amortization expense was $248.4 million in 2013 as compared to $248.7 million in 2012, a decrease of $0.3 million, primarily due to the amortization of the deferred pension credits regulatory liability and a decrease in the amortization of the storm regulatory asset (see Note 1). These decreases in depreciation and amortization expense were partially offset by:

• | increases in depreciation rates from the August 2012 rate case; and

• | additional assets being placed in service throughout 2013 and 2012, including the Sooner-Rose Hill and Sunnyside-Hugo transmission projects, which were fully in service in April 2012, the smart grid project which was completed in late 2012 and the Cleveland to Sooner transmission project which was fully in service in February 2013.

Taxes other than income was $83.8 million in 2013 as compared to $77.7 million in 2012, an increase of $6.1 million, or 7.9 percent, primarily due to higher ad valorem taxes.
Additional Information
Interest Expense. Interest expense was $129.3 million in 2013 as compared to $124.6 million in 2012, an increase of $4.7 million, or 3.8 percent, primarily due to a $6.4 million increase in interest on long term debt related to a $250 million debt issuance that occurred in May 2013, partially offset by a $2.0 million decrease in interest related to tax matters.
Income Tax Expense. Income tax expense was $113.5 million in 2013 as compared to $94.6 million in 2012, an increase of $18.9 million, or 20.0 percent. The increase in income tax expense was primarily due to higher pre-tax income and a reserve related to a portion of the Oklahoma investment tax credits generated in years prior to 2013 but not yet utilized.
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OGE Holdings (Natural Gas Midstream Operations)

| December 31,
(In millions) | 2014 | 2013 | 2012
Operating revenues | $ | — |  | $ | 630.4 |  | $ | 1,608.6 |
Cost of sales | — |  | 489.0 |  | 1,120.1 |
Other operation and maintenance | 1.2 |  | 60.9 |  | 172.9 |
Depreciation and amortization | — |  | 36.8 |  | 109.2 |
Impairment of assets | — |  | — |  | — |
Gain on insurance proceeds | — |  | — |  | (7.5 | )
Taxes other than income | — |  | 10.5 |  | 28.3 |
Operating income (loss) | (1.2 | ) | 33.2 |  | 185.6 |
Equity in earnings of unconsolidated affiliates | 172.6 |  | 101.9 |  | — |
Other income | — |  | 10.2 |  | 1.0 |
Other expense | — |  | 1.3 |  | 4.5 |
Interest expense | — |  | 10.6 |  | 32.6 |
Income tax expense | 69.1 |  | 26.9 |  | 45.7 |
Net income | 102.3 |  | 106.5 |  | 103.8 |
Less: Net income attributable to noncontrolling interests | — |  | 6.6 |  | 29.7 |
Net income attributable to OGE Holdings | $ | 102.3 |  | $ | 99.9 |  | $ | 74.1 |

Effective May 1, 2013, the Company deconsolidated its previously held investment in Enogex Holdings and acquired a 28.5 percent equity interest in Enable (26.3 percent as of December 31, 2014) which is being accounted for using the equity method of accounting. Prior to May 1, 2013, the Company reported the results of Enogex Holdings in the natural gas midstream operations segment.
Equity in earnings of unconsolidated affiliates includes OGE Energy's share of Enable earnings adjusted for the amortization of the basis difference of OGE Energy's original investment in Enogex and its underlying equity in net assets of Enable. The basis difference is the result of the initial contribution of Enogex to Enable in May 2013, and subsequent issuances of equity by Enable, including the IPO in April 2014 and the issuance of common units for the acquisition of CenterPoint's 24.95 percent interest in SESH. The basis difference is being amortized over approximately 30 years, the average life of the assets to which the basis difference is attributed. Equity in earnings of unconsolidated affiliates is also adjusted for the elimination of the Enogex Holdings fair value adjustments.
The difference between the Company's investment in Enable and its underlying equity in the net assets of Enable was $1.0 billion as of December 31, 2014.
Reconciliation of Equity in Earnings of Unconsolidated Affiliates
The following table reconciles OGE Energy's equity in earnings of its unconsolidated affiliates for the years ended December 31, 2014 and 2013.

| Year Ended December 31,
(In millions) | 2014 | 2013
OGE's share of Enable Net Income | $ | 143.1 |  | $ | 82.1 |
Amortization of basis difference | 14.0 |  | 9.4 |
Elimination of Enogex Holdings fair value and other adjustments | 15.5 |  | 10.4 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 172.6 |  | $ | 101.9 |

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The following table represents summarized financial information of Enable since its formation on May 1, 2013:
Enable Results of Operations

| Year Ended December 31,
(In millions) | 2014 | 2013
Operating revenues | $ | 3,367 |  | $ | 2,123 |
Cost of sales | 1,914 |  | 1,241 |
Operating income | 586 |  | 322 |
Net income attributable to Enable | 530 |  | 289 |

Year Ended December 31, 2014 as Compared to Year Ended December 31, 2013
Due to deconsolidation of Enogex LLC on May 1, 2013, the Company recorded no operating income for this segment for the eight-month period from May 1, 2013 through December 31, 2013 or the year ended December 31, 2014. Earnings after May 1, 2013 reflect the Company's equity interest in Enable's results, which are recorded in equity in earnings of unconsolidated affiliate, and the related tax effect. The table set forth below illustrates the impact of the operating results of Enable for the year ended December 31, 2014 as compared to the combined results of Enogex LLC for the four months ended April 30, 2013 and Enable for the eight months from May 1, 2013 to December 31, 2013.

| Enable Midstream Partners (Equity Method - Year Ended December 31, 2014) | Natural Gas Midstream Operations (Consolidated - Four Months Ended April 30, 2013) | Enable Midstream Partners (Equity Method - Eight Months Ended December 31, 2013) | Total (Year Ended December 31, 2013)
(In millions) |  |  |  |
Operating revenues | $ | — |  | $ | 630.4 |  | $ | — |  | $ | 630.4 |
Cost of sales | — |  | 489.0 |  | — |  | 489.0 |
Operating expenses | 1.2 |  | 108.2 |  | — |  | 108.2 |
Operating income | (1.2 | ) | 33.2 |  | — |  | 33.2 |
Equity in earnings of unconsolidated affiliates | 172.6 |  | — |  | 101.9 |  | 101.9 |
Other income/(expense) | — |  | 8.9 |  | — |  | 8.9 |
Interest expense | — |  | 10.6 |  | — |  | 10.6 |
Earnings before taxes | 171.4 |  | 31.5 |  | 101.9 |  | 133.4 |
Income tax expense | 69.1 |  | 9.4 |  | 17.5 |  | 26.9 |
Net income | 102.3 |  | 22.1 |  | 84.4 |  | 106.5 |
Less: net income attributable to noncontrolling interests | — |  | 6.6 |  | — |  | 6.6 |
Net income attributable to OGE Energy | $ | 102.3 |  | $ | 15.5 |  | $ | 84.4 |  | $ | 99.9 |

OGE Holding’s net income decreased $4.2 million, or 4 percent for the year ended December 31, 2014 as compared to the same period of 2013 due to higher pre-tax income and higher tax expense. OGE Holding's earnings before taxes increased $38.0 million, or 28.5 percent, for the year ended December 31, 2014 as compared to the same period of 2013. The increase reflects the accretive effect to OGE Holdings of Enable, for the entire year of 2014, as compared to only eight months of 2013, following the formation of Enable on May 1, 2013. Enable’s operating results for 2014 improved as compared to 2013, due to increased gathering and processing margins as a result of higher processed volumes in the Anadarko and Ark-La-Tex basins (which offset lower gathering volumes) and higher crude oil gathering margins. Additionally, Enable’s operating results for 2014 improved as compared to 2013 due to higher transportation and storage margins as a result of an increase of unrealized gains on natural gas derivatives and an increase of system optimization activities. The higher margins were offset in part, by higher depreciation expenses resulting from assets being placed in service and higher operating and maintenance expenses. Finally, as a result of Enable’s initial public offering in April 2014, and CenterPoint’s exercising of its put right to Enable, for its 24.95 percent interest in SESH, OGE Energy’s ownership in Enable dropped from 28.5 percent at the beginning of 2014 to 26.3 percent by the end of 2014, further partially offsetting the increase in earnings before taxes.
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Income Tax Expense. Income tax expense was $69.1 million in 2014 as compared to $26.9 million in 2013, an increase of $42.2 million primarily due to higher pre-tax income and higher tax expense as compared to the prior period due to the absence of favorable deferred tax adjustments related to the formation of Enable.
Operating Data

| December 31,
| 2014 | 2013
Gathered volumes - TBtu/d | 3.34 |  | 3.05 |
Transportation volumes - TBtu/d | 4.95 |  | 4.41 |
Natural gas processed volumes - TBtu/d | 1.56 |  | 1.09 |
NGLs sold - million gallons/d (A)(B) | 68.67 |  | 44.91 |

(A) | Excludes condensate.

(B) | NGLS sold includes volumes of NGLS withdrawn from inventory or purchased for system balancing purposes.

Year Ended December 31, 2013 as Compared to Year Ended December 31, 2012
OGE Holdings' net income for the four months ended April 2013 as compared to the same period of 2012 decreased $18.7 million primarily due to a $45.4 million reduction in operating income reflecting lower NGLs prices, lower keep-whole processing spreads and the contract conversion of the Texas production volumes of one of Enogex LLC's five largest customers from keep-whole to fixed-fee, and to a lesser extent, slightly higher other operation and maintenance expense and depreciation and amortization expense. These decreases were partially offset by increased gathering rates and volumes and inlet processing volumes associated with ongoing Enogex LLC expansion projects and the gas gathering assets acquired in August 2012, and a $9.9 million gain related to the sale of certain gas gathering assets in the Texas panhandle in January 2013. Also offsetting the decrease were $11.4 million in lower income taxes primarily related to lower pre-tax income, and a $6.8 million reduction in earnings attributable to non-controlling interests due to the lower pre-tax earnings.
Due to the deconsolidation of Enogex LLC on May 1, 2013 as discussed above, the Company recorded no operating income for this segment for the eight month period from May 1, 2013 through December 31, 2013. Earnings in this eight month period reflect the Company’s equity interest in Enable's results, which are recorded in equity in earnings of unconsolidated affiliate, and the related tax effect. The table set forth below illustrates the impact of the operating results of Enogex LLC and Enable for the four months ended April 30, 2013, and the eight months from May 1, 2013 to December 31, 2013, respectively.
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| Natural Gas Midstream Operations (Consolidated - Four Months Ended April 30, 2013) | OGE Holdings (Equity Method - Eight Months Ended December 31, 2013) | Total (Year Ended December 31, 2013) | Natural Gas Midstream Operations (Consolidated - Year Ended December 31, 2012)
(In millions) |  |  |  |
Operating revenues | $ | 630.4 |  | $ | — |  | $ | 630.4 |  | $ | 1,608.6 |
Cost of sales | 489.0 |  | — |  | 489.0 |  | 1,120.1 |
Operating expenses | 108.2 |  | — |  | 108.2 |  | 302.9 |
Operating income | 33.2 |  | — |  | 33.2 |  | 185.6 |
Equity in earnings of unconsolidated affiliates | — |  | 101.9 |  | 101.9 |  | — |
Other income (expense) | 8.9 |  | — |  | 8.9 |  | (3.5 | )
Interest expense | 10.6 |  | — |  | 10.6 |  | 32.6 |
Earnings before income taxes | 31.5 |  | 101.9 |  | 133.4 |  | 149.5 |
Income tax expense | 9.4 |  | 17.5 |  | 26.9 |  | 45.7 |
Net income | 22.1 |  | 84.4 |  | 106.5 |  | 103.8 |
Less: net income attributable to noncontrolling interests | 6.6 |  | — |  | 6.6 |  | 29.7 |
Net income attributable to OGE Energy | $ | 15.5 |  | $ | 84.4 |  | $ | 99.9 |  | $ | 74.1 |

Results for Enable for the eight months ended December 31, 2013, were consistent with management's expectations in light of lower natural gas liquids prices and low seasonal and geographic price differentials. Enable continued to increase processing volumes through system expansions. Transportation throughput was impacted by system integrity projects and slightly lower demand. Gathering throughput was slightly lower, impacted by well connects, with lower throughput offset by the impact of minimum commitment features. For the eight-month period from May 1, 2013 to December 31, 2013 as compared to the same period in 2012 there was a $44.5 million increase in net income in large part reflecting the accretive impact of the Enable formation. Included in that increase was a $24.9 million reduction in deferred state income taxes, associated with a remeasurement of the accumulated deferred taxes related to the formation of Enable partially offset by deferred tax adjustments related to the Company's deconsolidation of Enogex Holdings and higher pre-tax income (net of noncontrolling interest). Enable continued to increase processing volumes through system expansions. Transportation throughput was impacted by system integrity projects and slightly lower demand. Gathering throughput was slightly lower, impacted by well connects, with lower throughput offset by the impact of minimum commitment features.
For the year ended December 31, 2013, OGE Holdings' net income increased $25.8 million as a result of the $44.5 increase in net income for eight months ended December 31, offset in part by the $18.7 million reduction or the four months ended April 30.
Off-Balance Sheet Arrangement
OG&E Railcar Lease Agreement
OG&E has a noncancellable operating lease with purchase options, covering 1,387 coal rotary gondola railcars to transport coal from Wyoming to OG&E's coal-fired generation units. Rental payments are charged to Fuel Expense and are recovered through OG&E's tariffs and fuel adjustment clauses. On December 15, 2010, OG&E renewed the lease agreement effective February 1, 2011. At the end of the new lease term, which is February 1, 2016, OG&E has the option to either purchase the railcars at a stipulated fair market value or renew the lease. If OG&E chooses not to purchase the railcars or renew the lease agreement and the actual fair value of the railcars is less than the stipulated fair market value, OG&E would be responsible for the difference in those values up to a maximum of $22.8 million. OG&E is also required to maintain all of the railcars it has under the operating lease and has entered into an agreement with a non-affiliated company to furnish this maintenance.
On January 11, 2012, OG&E executed a five-year lease agreement for 135 railcars to replace railcars that have been taken out of service or destroyed. OG&E has a unilateral right to terminate this lease upon a 6-month notice effective April 2016.
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On October 14, 2014, OG&E signed a three-year lease effective beginning December 2014 for 131 railcars to replace railcars that have been taken out of service or destroyed.
Liquidity and Capital Resources
Working Capital
Working capital is defined as the amount by which current assets exceed current liabilities. The Company's working capital requirements are driven generally by changes in accounts receivable, accounts payable, commodity prices, credit extended to, and the timing of collections from, customers, the level and timing of spending for maintenance and expansion activity, inventory levels and fuel recoveries.
The balance of Income Taxes Receivable was $16.0 million and $5.6 million at December 31, 2014 and 2013, respectively, an increase of $10.4 million, primarily due to a receivable related to Oklahoma wind credits and overpayments refundable from Louisiana.
The balance of Fuel Inventories was $58.5 million and $74.4 million at December 31, 2014 and 2013, respectively, a decrease of $15.9 million, or 21.4 percent, primarily due to lower coal inventory balances at OG&E's coal fired plants resulting from higher generation related to OG&E's participation in the Integrated Market along with lower deliveries due to market constraints.
The balance of Deferred Income Tax assets was $191.4 million and $215.8 million at December 31, 2014 and 2013, respectively, a decrease of $24.4 million, or 11.3 percent, primarily due to a decrease in deferred income taxes reflecting the expected utilization of net operating losses.
The balance of Fuel Clause Under Recoveries was $68.3 million and $26.2 million at December 31, 2014 and 2013, respectively, an increase of $42.1 million, primarily due to lower amounts billed to OG&E retail customers as compared to the actual cost of fuel and purchased power. The fuel recovery clauses are designed to smooth the impact of fuel price volatility on customers' bills. As a result, OG&E under recovers fuel costs when the actual fuel and purchased power cost recoveries exceed fuel adjustment clause recoveries and over recovers fuel costs when the actual fuel and purchased power costs are below the fuel adjustment clause recoveries. Provisions in the fuel clauses are intended to allow OG&E to amortize under and over recovery balances into future cost recoveries.
The balance of Short-Term Debt was $98.0 million and $439.6 million at December 31, 2014 and 2013, respectively, a decrease of $341.6 million or 77.7 percent, primarily due to proceeds received from a $250 million bond issuance in December 2014 along with distributions from Enable.
The balance of Accounts Payable was $179.1 million and $251.0 million at December 31, 2014 and 2013, respectively, a decrease of $71.9 million, or 28.6 percent, primarily due to a decrease of fuel and purchased power mainly due to participation in the SPP Integrated Marketplace along with milder weather in 2014. Additionally, there was a decrease in accounts payable related to the timing of vendor payments.
The balance of Accrued Compensation was $38.2 million and $56.9 million at December 31, 2014 and 2013, respectively, a decrease of $18.7 million, or 32.9 percent, primarily resulting from the payment of incentive compensation for Enable employees related to 2013 as well as lower levels of accrued incentive compensation for 2014.
The balance of Long-Term Debt due within one year had no balance as of December 31, 2014 compared to $100.0 million at December 31, 2013, primarily due to a senior note that was due to mature in November 2014. The Company made the decision to refinance the note in August 2014 and it was reclassified as long term debt at that time.
Cash Flows

|  |  |  | 2014 vs. 2013 | 2013 vs. 2012
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | $ Change | % Change | $ Change | % Change
Net cash provided from operating activities | $ | 721.6 |  | $ | 623.2 |  | $ | 1,046.1 |  | $ | 98.4 |  | 15.8 | % | $ | (422.9 | ) | (40.4 | )%
Net cash used in investing activities | (559.1 | ) | (957.0 | ) | (1,192.6 | ) | 397.9 |  | 41.6 | % | 235.6 |  | 19.8 | %
Net cash provided from (used in) financing activities | (163.8 | ) | 338.8 |  | 143.7 |  | (502.6 | ) | * |  | 195.1 |  | * |

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* Percentage is greater than 100 percent.
Operating Activities
The increase of $98.4 million, or 15.8 percent, in net cash provided from operating activities in 2014 as compared to 2013 was primarily due to:

• | the absence of fuel refunds to customers during the twelve months ended December 31, 2014, partially offset by fuel under recoveries in the same period;

• | an increase in cash distributions received from Enable in excess of cash distributions and cash provided from the operating activities of Enogex Holdings in 2013; and

• | an increase in cash received during the twelve months ended December 31, 2014 from transmission revenue.

These increases were partially offset by an increase in amounts paid to vendors.
The decrease of $422.9 million, or 40.4 percent, in net cash provided from operating activities in 2013 as compared to 2012 was primarily due to:

• | fuel refunds at OG&E in 2013 as compared to higher fuel recoveries in 2012; and

• | the combination of operating cash generated from the operations of Enogex Holdings through April 30, 2013 and the cash distributions received from Enable since May 1, 2013 were less than the operating cash generated from the operations of Enogex Holdings for the year ended December 31, 2012.

Investing Activities
The decrease of $397.9 million, or 41.6 percent, in net cash used in investing activities in 2014 as compared to 2013 was primarily due to lower levels of capital expenditures due to a decrease in transmission projects at OG&E and the deconsolidation of Enogex Holdings.
The decrease of $235.6 million, or 19.8 percent, in net cash used in investing activities in 2013 as compared to 2012 is primarily a result of decreased capital expenditures related to the deconsolidation of Enogex Holdings on May 1, 2013 partially offset by increased capital expenditures at OG&E in 2013 related to various transmission projects.
Financing Activities
The increase of $502.6 million in net cash used in financing activities in 2014 as compared to 2013 was primarily due to:

• | a decrease in short-term debt;

• | the payment to retire $240 million of long-term debt in 2014;

• | payments in 2013 on advances from unconsolidated affiliates due to the deconsolidation of Enogex Holdings; and

• | contributions in 2013 from the ArcLight group related to the closing of the transaction to form Enable.

These increases were partially offset by proceeds received from the issuance of long-term debt in 2014.
The increase of $195.1 million in net cash provided from financing activities in 2013 as compared to 2012 was primarily due to:

• | a decrease in repayments of lines of credit in 2013 as compared to 2012;

• | payments on advances from unconsolidated affiliates due to the deconsolidation of Enogex Holdings on May 1, 2013; and

• | higher contributions from the ArcLight group related to the closing of the transaction to form Enable.

These increases in net cash provided from financing activities were partially offset by a decrease in short-term debt borrowings during 2013 as compared to 2012.
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Future Capital Requirements and Financing Activities
The Company's primary needs for capital are related to acquiring or constructing new facilities and replacing or expanding existing facilities at OG&E. Other working capital requirements are expected to be primarily related to maturing debt, operating lease obligations, fuel clause under and over recoveries and other general corporate purposes. The Company generally meets its cash needs through a combination of cash generated from operations, short-term borrowings (through a combination of bank borrowings and commercial paper) and permanent financings.
Capital Expenditures
The Company's consolidated estimates of capital expenditures for the years 2015 through 2019 are shown in the following table. These capital expenditures represent the base maintenance capital expenditures (i.e., capital expenditures to maintain and operate the Company's businesses) plus capital expenditures for known and committed projects. Estimated capital expenditures for Enable are not included in the table below.

(In millions) | 2015 | 2016 | 2017 | 2018 | 2019
OG&E Base Transmission | $ | 40 |  | $ | 30 |  | $ | 30 |  | $ | 30 |  | $ | 30 |
OG&E Base Distribution | 175 |  | 175 |  | 175 |  | 175 |  | 175 |
OG&E Base Generation | 90 |  | 75 |  | 75 |  | 75 |  | 75 |
OG&E Other | 50 |  | 25 |  | 25 |  | 25 |  | 25 |
Total Base Transmission, Distribution, Generation and Other | 355 |  | 305 |  | 305 |  | 305 |  | 305 |
OG&E Known and Committed Projects: |  |  |  |  |
Transmission Projects: |  |  |  |  |
Regionally Allocated Base Projects (A) | 20 |  | 20 |  | 20 |  | 20 |  | 20 |
SPP Integrated Transmission Projects (B) (C) | 30 |  | 35 |  | 25 |  | 10 |  | 60 |
Total Transmission Projects | 50 |  | 55 |  | 45 |  | 30 |  | 80 |
Other Projects: |  |  |  |  |
Smart Grid Program | 10 |  | 10 |  | — |  | — |  | — |
Environmental - low NOX burners (D) | 35 |  | 20 |  | 10 |  | — |  | — |
Environmental - activated carbon injection (D) | 20 |  | — |  | — |  | — |  | — |
Environmental - natural gas conversion (D) | — |  | — |  | — |  | 40 |  | 35 |
Environmental - scrubbers (D) | 60 |  | 115 |  | 75 |  | 215 |  | 55 |
Combustion turbines - Environmental Compliance Plan | 15 |  | 45 |  | 175 |  | 165 |  | — |
Total Other Projects | 140 |  | 190 |  | 260 |  | 420 |  | 90 |
Total Known and Committed Projects | 190 |  | 245 |  | 305 |  | 450 |  | 170 |
Total | $ | 545 |  | $ | 550 |  | $ | 610 |  | $ | 755 |  | $ | 475 |

(A) | Approximately 30% of revenue requirement allocated to SPP members other than OG&E.

(B) | Approximately 85% of revenue requirement allocated to SPP members other than OG&E.

(C) | Project Type | Project Description | Estimated Cost (In millions) | Projected In-Service Date
| Integrated Transmission Project | 30 miles of transmission line from OG&E's Gracemont substation to an AEP companion transmission line to its Elk City substation | $45 | Early 2018
| Integrated Transmission Project | 126 miles of transmission line from OG&E's Woodward District Extra High Voltage substation to OG&E's Cimarron substation; construction of the Mathewson substation on this transmission line | $180 | Early 2021

(D) | Represent capital costs associated with OG&E’s Environmental Compliance Plan to comply with the EPA’s MATS and Regional Haze rules. More detailed discussion regarding Regional Haze and OG&E’s Environmental Compliance Plan can be found in Note 15 of Notes to Financial Statements under "Environmental Compliance Plan" in Item 8 of Part II of this Form 10-K, and under “Environmental Laws and Regulations” within “Management's Discussion and Analysis of Financial Condition and Results of Operations” under Part II, Item 7 of this Form 10-K.

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Additional capital expenditures beyond those identified in the table above, including additional incremental growth opportunities in electric transmission assets will be evaluated based upon their impact upon achieving the Company's financial objectives.
Contractual Obligations
The following table summarizes the Company's contractual obligations at December 31, 2014. See the Company's Consolidated Statements of Capitalization and Note 14 of Notes to Consolidated Financial Statements for additional information.

(In millions) | 2015 | 2016-2017 | 2018-2019 | After 2019 | Total
Maturities of long-term debt (A) | $ | 0.2 |  | $ | 335.3 |  | $ | 500.2 |  | $ | 1,929.9 |  | $ | 2,765.6 |
Operating lease obligations |  |  |  |  |
Railcars | 4.5 |  | 29.7 |  | — |  | — |  | 34.2 |
Wind farm land leases | 2.1 |  | 4.5 |  | 4.8 |  | 46.4 |  | 57.8 |
OGE Energy noncancellable operating lease | 0.8 |  | 1.6 |  | 0.7 |  | — |  | 3.1 |
Total operating lease obligations | 7.4 |  | 35.8 |  | 5.5 |  | 46.4 |  | 95.1 |
Other purchase obligations and commitments |  |  |  |  |
Cogeneration capacity and fixed operation and maintenance payments | 85.2 |  | 164.0 |  | 148.4 |  | 167.4 |  | 565.0 |
Expected cogeneration energy payments | 74.4 |  | 159.7 |  | 174.8 |  | 235.9 |  | 644.8 |
Minimum fuel purchase commitments | 389.3 |  | 290.2 |  | — |  | — |  | 679.5 |
Expected wind purchase commitments | 58.4 |  | 119.6 |  | 117.5 |  | 308.6 |  | 604.1 |
Long-term service agreement commitments | 2.5 |  | 5.3 |  | 46.9 |  | 142.3 |  | 197.0 |
Environmental compliance plan expenditures | 66.5 |  | 255.7 |  | 54.0 |  | — |  | 376.2 |
Total other purchase obligations and commitments | 676.3 |  | 994.5 |  | 541.6 |  | 854.2 |  | 3,066.6 |
Total contractual obligations | 683.9 |  | 1,365.6 |  | 1,047.3 |  | 2,830.5 |  | 5,927.3 |
Amounts recoverable through fuel adjustment clause (B) | (526.6 | ) | (599.2 | ) | (292.3 | ) | (544.5 | ) | (1,962.6 | )
Total contractual obligations, net | $ | 157.3 |  | $ | 766.4 |  | $ | 755.0 |  | $ | 2,286.0 |  | $ | 3,964.7 |

(A) | Maturities of the Company's long-term debt during the next five years consist of $0.2 million, $110.2 million, $225.1 million, $250.1 million and $250.1 million in years 2015, 2016, 2017, 2018 and 2019, respectively.

(B) | Includes expected recoveries of costs incurred for OG&E's railcar operating lease obligations, OG&E's expected cogeneration energy payments, OG&E's minimum fuel purchase commitments and OG&E's expected wind purchase commitments.

OG&E also has 440 MWs of QF contracts to meet its current and future expected customer needs. OG&E will continue reviewing all of the supply alternatives to these QF contracts that minimize the total cost of generation to its customers, including exercising its options (if applicable) to extend these QF contracts at pre-determined rates.
The actual cost of fuel used in electric generation (which includes the operating lease obligations for OG&E's railcar leases shown above) and certain purchased power costs are passed through to OG&E's customers through fuel adjustment clauses. Accordingly, while the cost of fuel related to operating leases and the vast majority of minimum fuel purchase commitments of OG&E noted above may increase capital requirements, such costs are recoverable through fuel adjustment clauses and have little, if any, impact on net capital requirements and future contractual obligations. The fuel adjustment clauses are subject to periodic review by the OCC, the APSC and the FERC.
Pension and Postretirement Benefit Plans
At December 31, 2014, 33.0 percent of the Pension Plan investments were in listed common stocks with the balance primarily invested in U.S Government securities, bonds, debentures and notes, a commingled fund and a common collective trust as presented in Note 12 of Notes to Consolidated Financial Statements. In 2014, asset returns on the Pension Plan were 12.8 percent due to the gains in fixed income and equity investments. During the same time, corporate bond yields, which are used in determining the discount rate for future pension obligations, decreased. During 2013, OGE Energy made contributions to its Pension Plan of $35 million to help ensure that the Pension Plan maintains an adequate funded status. The level of funding is dependent on returns on plan assets and future discount rates. During 2014, OGE Energy did not make any contributions to its Pension Plan. OGE Energy has not yet determined whether it will need to make any contributions to the Pension Plan in 2015. OGE
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Energy could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future.
The following table presents the status of the Company's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans at December 31, 2014 and 2013. These amounts have been recorded in Accrued Benefit Obligations with the offset in Accumulated Other Comprehensive Loss (except OG&E's portion which is recorded as a regulatory asset as discussed in Note 1 of Notes to Consolidated Financial Statements) in the Company's Consolidated Balance Sheet. The amounts in Accumulated Other Comprehensive Loss and those recorded as a regulatory asset represent a net periodic benefit cost to be recognized in the Consolidated Statements of Income in future periods.

| Pension Plan | Restoration of Retirement Income Plan | Postretirement Benefit Plans
December 31 (In millions) | 2014 | 2013 | 2014 | 2013 | 2014 | 2013
Benefit obligations | $ | 725.0 |  | $ | 658.1 |  | $ | 19.7 |  | $ | 14.0 |  | $ | 280.9 |  | $ | 258.2 |
Fair value of plan assets | 679.8 |  | 654.9 |  | — |  | — |  | 59.6 |  | 61.4 |
Funded status at end of year | $ | (45.2 | ) | $ | (3.2 | ) | $ | (19.7 | ) | $ | (14.0 | ) | $ | (221.3 | ) | $ | (196.8 | )

In accordance with ASC Topic 715, "Compensation - Retirement Benefits," a one-time settlement charge is required to be recorded by an organization when lump sum payments or other settlements that relieve the organization from the responsibility for the pension benefit obligation during a plan year exceed the service cost and interest cost components of the organization’s net periodic pension cost. During 2013, the Company experienced an increase in both the number of employees electing to retire and the amount of lump sum payments to be paid to such employees upon retirement. As a result, and based in part on the Company’s historical experience regarding eligible employees who elect to retire in the last quarter of a particular year, the Company recorded pension settlement charges of $22.4 million in the fourth quarter of 2013, of which $17.0 million related to OG&E’s Oklahoma jurisdiction and has been included in the pension tracker. The pension settlement charge did not require a cash outlay by the Company and did not increase the Company’s total pension expense over time, as the charges were an acceleration of costs that otherwise would be recognized as pension expense in future periods.
Common Stock Dividends
The Company's dividend policy is reviewed by the Board of Directors at least annually and is based on numerous factors, including management's estimation of the long-term earnings power of its businesses. The Company's financial objective includes dividend increases of approximately 10 percent annually through 2019. The targeted annual dividend increase has been determined after consideration of numerous factors, including the largely retail composition of the Company's shareholder base, the Company's financial position, the Company's growth targets and the composition of the Company's assets and investment opportunities. At the Company's September 2014 Board meeting, the Board of Directors approved management's recommendation of an 11 percent increase in the quarterly dividend rate to $0.25000 per share from $0.22500 per share effective in October 2014.
Security Ratings

| Moody’s Investors Services | Standard & Poor's Ratings Services | Fitch Ratings
OG&E Senior Notes | A1 | A- | A+
OGE Energy Senior Notes | A3 | BBB+ | A-
OGE Energy Commercial Paper | P2 | A2 | F2

Access to reasonably priced capital is dependent in part on credit and security ratings. Generally, lower ratings lead to higher financing costs. Pricing grids associated with the Company's credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of the Company's short-term borrowings, but a reduction in the Company's credit rating s would not result in any defaults or accelerations. Any future downgrade could also lead to higher long-term borrowing costs and, if below investment grade, would require the Company to post collateral or letters of credit.
On November 8, 2013, Moody's Investors Services placed the credit ratings of OGE Energy and OG&E on review for possible upgrade. On January 31, 2014, Moody's upgraded the long-term senior unsecured rating of OGE Energy to A3 and OG&E to A1 primarily due to their more favorable view of the relative credit supportiveness of the U.S. regulatory environment. All other security ratings from Moody's remain unchanged.
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A security rating is not a recommendation to buy, sell or hold securities. Such rating may be subject to revision or withdrawal at any time by the credit rating agency and each rating should be evaluated independently of any other rating.
Future financing requirements may be dependent, to varying degrees, upon numerous factors such as general economic conditions, abnormal weather, load growth, commodity prices, acquisitions of other businesses and/or development of projects, actions by rating agencies, inflation, changes in environmental laws or regulations, rate increases or decreases allowed by regulatory agencies, new legislation and market entry of competing electric power generators.
2014 Capital Requirements, Sources of Financing and Financing Activities
Total capital requirements, consisting of capital expenditures and maturities of long-term debt, were $809.5 million and contractual obligations, net of recoveries through fuel adjustment clauses, were $88.2 million resulting in total net capital requirements and contractual obligations of $897.7 million in 2014, of which $31.5 million was to comply with environmental regulations. This compares to net capital requirements of $990.7 million and net contractual obligations of $96.4 million totaling $1,087.1 million in 2013, of which $42.0 million was to comply with environmental regulations.
In 2014, the Company's sources of capital were cash generated from operations, proceeds from the issuance of short- and long - term debt, proceeds from the sales of common stock to the public through the Company's Automatic Dividend Reinvestment and Stock Purchase Plan and distributions from Enable. Changes in working capital reflect the seasonal nature of the Company's business, the revenue lag between billing and collection from customers and fuel inventories. See "Working Capital" for a discussion of significant changes in net working capital requirements as it pertains to operating cash flow and liquidity.
Issuance of Long-Term Debt
On March 25, 2014, OG&E completed the issuance of $250 million of 4.55 percent senior notes due March 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
On November 19, 2014, the Company completed the issuance of $100 million in aggregate principal of its Floating Rate Senior Notes, Series due November 24, 2017. The proceeds from the issuance were used to refinance its $100 million of 5.00 percent Senior Notes due November 15, 2014.
On December 11, 2014, OG&E completed the issuance of $250 million of 4.000 percent Senior Notes, Series due December 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay short-term debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
Redemption of Long-Term Debt
On August 1, 2014, OG&E redeemed all $140 million principal amount outstanding of its 6.50 percent senior notes due August 1, 2034 at 103.25 percent of their principal amount, plus accrued interest. The redemption premium of $4.6 million was deferred and will be amortized through March 2044 to match the expected regulatory treatment.
The Dodd-Frank Act
Derivative instruments are utilized in managing OG&E's commodity price exposures. On July 21, 2010, President Obama signed into law the Dodd-Frank Act. Among other things, the Dodd-Frank Act provides for a new regulatory regime for derivatives, including mandatory clearing of certain swaps and margin requirements. The Dodd-Frank Act contains provisions that should exempt certain derivatives end-users such as OG&E from much of the clearing requirements. The regulations require that the decision on whether to use the end-user exception from mandatory clearing for derivative transactions be reviewed and approved by an "appropriate committee" of the Board of Directors. On January 12, 2015, President Obama signed into law an amendment to the Dodd-Frank Act that exempts from margin requirements swaps used by end-users to hedge or mitigate commercial risk. There are, however, some rulemakings that have no yet been finalized. Even if OG&E qualifies for the end-user exception to clearing and margin requirements are not imposed on end-users, its derivative counterparties may be subject to new capital, margin and business conduct requirements as a result of the new regulations, which may increase OG&E's transaction costs or make it more difficult to enter into derivative transactions on favorable terms. OG&E's inability to enter into derivative transactions on favorable terms, or at all, could increase operating expenses and put OG&E at increased exposure to risks of adverse changes in commodities prices. The impact of the provisions of the Dodd-Frank Act on OG&E cannot be fully determined at this time due
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to uncertainty over forthcoming regulations and potential changes to the derivatives markets arising from new regulatory requirements.
Future Sources of Financing
Management expects that cash generated from operations, proceeds from the issuance of long and short-term debt, proceeds from the sales of common stock to the public through the Company's Automatic Dividend Reinvestment and Stock Purchase Plan or other offerings and distributions from Enable will be adequate over the next three years to meet anticipated cash needs and to fund future growth opportunities. The Company utilizes short-term borrowings (through a combination of bank borrowings and commercial paper) to satisfy temporary working capital needs and as an interim source of financing capital expenditures until permanent financing is arranged.
Short-Term Debt and Credit Facilities
Short-term borrowings generally are used to meet working capital requirements. The Company borrows on a short-term basis, as necessary, by the issuance of commercial paper and by borrowings under its revolving credit agreements. The Company has revolving credit facilities totaling in the aggregate $1,150.0 million. These bank facilities can also be used as letter of credit facilities. The short-term debt balance was $98.0 million and $439.6 million at December 31, 2014 and 2013, respectively. The weighted-average interest rate on short-term debt at December 31, 2014 was 0.41 percent. The average balance of short-term debt in 2014 was $417.8 million at a weighted-average interest rate of 0.30 percent. The maximum month-end balance of short-term debt in 2014 was $562.7 million. At December 31, 2014, the Company had $1,050.0 million of net available liquidity under its revolving credit agreements. OG&E has the necessary regulatory approvals to incur up to $800 million in short-term borrowings at any one time for a two-year period beginning January 1, 2015 and ending December 31, 2016. At December 31, 2014, the Company had $5.5 million in cash and cash equivalents. See Note 11 of Notes to Consolidated Financial Statements for a discussion of the Company's short-term debt activity.
In December 2011, the Company and OG&E entered into unsecured five-year revolving credit agreement s to total in the aggregate $1,150.0 million ($750.0 million for the Company and $400.0 million for OG&E). Each of the credit facilit ies contained an option, which could be exercised up to two times, to extend the term for an additional year. In the third quarter of 2013, the Company and OG&E utilized one of these one-year extensions, and received consent from all of the lenders, to extend the maturity of their credit agreement s from December 13, 2016 to December 13, 2017. In the second quarter of 2014, the Company and OG&E utilized their second extension to extend the maturity of their respective credit facility from December 13, 2017 to December 13, 2018. As of December 31, 2014, commitments of a single existing lender with respect to approximately $16.3 million and $8.7 million of the Company's and OG&E's credit facilities, respectively, however, were not extended and, unless the non-extending lender is replaced in accordance with the terms of the credit facility, such commitments will expire December 13, 2017.
Common Stock
The Company expects to issue between $10 million and $15 million of common stock in its Automatic Dividend Reinvestment and Stock Purchase Plan in 2015. See Note 9 of Notes to Consolidated Financial Statements for a discussion of the Company's common stock activity.
Distributions by Enable
Pursuant to the Enable limited partnership agreement, during 2014 Enable made distributions of $143.7 million to the Company.
Critical Accounting Policies and Estimates
The Consolidated Financial Statements and Notes to Consolidated Financial Statements contain information that is pertinent to Management's Discussion and Analysis. In preparing the Consolidated Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Changes to these assumptions and estimates could have a material effect on the Company's Consolidated Financial Statements. However, the Company believes it has taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to the Company that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas of the Company where the most significant judgment is exercised for all Company segments includes the determination of Pension Plan assumptions, income taxes, contingency reserves, asset retirement obligations and depreciable lives of property, plant and equipment. For the electric utility segment, the most
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significant judgment is also exercised in the existence of regulatory assets and liabilities and unbilled revenues. The selection, application and disclosure of the following critical accounting estimates have been discussed with the Company's Audit Committee. The Company discusses its significant accounting policies, including those that do not require management to make difficult, subjective, or complex judgments or estimates, in Note 1 of Notes to Consolidated Financial Statements.
Pension and Postretirement Benefit Plans
The Company has a Pension Plan that covers a significant amount of the Company's employees hired before December 1, 2009. Also, effective December 1, 2009, the Company's Pension Plan is no longer being offered to employees hired on or after December 1, 2009. The Company also has defined benefit postretirement plans that cover a significant amount of its employees. Pension and other postretirement plan expenses and liabilities are determined on an actuarial basis and are affected by the market value of plan assets, estimates of the expected return on plan assets, assumed discount rates and the level of funding. Actual changes in the fair market value of plan assets and differences between the actual return on plan assets and the expected return on plan assets could have a material effect on the amount of pension expense ultimately recognized. The pension plan rate assumptions are shown in Note 12 of Notes to Consolidated Financial Statements. The assumed return on plan assets is based on management's expectation of the long-term return on the plan assets portfolio. The discount rate used to compute the present value of plan liabilities is based generally on rates of high-grade corporate bonds with maturities similar to the average period over which benefits will be paid. The level of funding is dependent on returns on plan assets and future discount rates. Higher returns on plan assets and an increase in discount rates will reduce funding requirements to the Pension Plan. The following table indicates the sensitivity of the Pension Plan funded status to these variables.

| Change | Impact on Funded Status
Actual plan asset returns | +/- 1 percent | +/- $6.5 million
Discount rate | +/- 0.25 percent | +/- $18.3 million
Contributions | +/- $10 million | +/- $10 million

Income Taxes
The Company uses the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change.
The application of income tax law is complex. Laws and regulations in this area are voluminous and often ambiguous. Interpretations and guidance surrounding income tax laws and regulations change over time. Accordingly, it is necessary to make judgments regarding income tax exposure. As a result, changes in these judgments can materially affect amounts the Company recognized in its consolidated financial statements. Tax positions taken by the Company on its income tax returns that are recognized in the financial statements must satisfy a more likely than not recognition threshold, assuming that the position will be examined by taxing authorities with full knowledge of all relevant information.
Asset Retirement Obligations
The Company has previously recorded asset retirement obligations that are being amortized over their respective lives ranging from 4 to 74 years. The inputs used in the valuation of asset retirement obligations include the assumed life of the asset placed into service, the average inflation rate, market risk premium, the credit-adjusted risk free interest rate and the timing of incurring costs related to the retirement of the asset.
Hedging Policies
From time to time, OG&E may engage in cash flow and fair value hedge transactions to modify interest rate exposure and not to modify the overall leverage of the debt portfolio.
Hedges are evaluated prior to execution with respect to the impact on the volatility of forecasted earnings and are evaluated at least quarterly after execution for the impact on earnings.
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Regulatory Assets and Liabilities
OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment.
OG&E records certain incurred costs and obligations as regulatory assets or liabilities if it is probable, based on regulatory orders or other available evidence, that the cost or obligation will be included in amounts allowable for recovery or refund in future rates. The benefit obligations regulatory asset is comprised of expenses recorded which are probable of future recovery and that have not yet been recognized as components of net periodic benefit cost, including net loss and prior service cost.
Unbilled Revenues
OG&E reads its customers' meters and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. Unbilled revenue is presented in Accrued Unbilled Revenues on the Consolidated Balance Sheets and in Operating Revenues on the Consolidated Statements of Income based on estimates of usage and prices during the period. At December 31, 2014, if the estimated usage or price used in the unbilled revenue calculation were to increase or decrease by one percent, this would cause a change in the unbilled revenues recognized of $0.3 million. At December 31, 2014 and 2013, Accrued Unbilled Revenues were $55.5 million and $58.7 million, respectively. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers.
Allowance for Uncollectible Accounts Receivable
Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is calculated by multiplying the last six months of electric revenue by the provision rate. The provision rate is based on a 12-month historical average of actual balances written off. To the extent the historical collection rates are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. At December 31, 2014, if the provision rate were to increase or decrease by 10 percent, this would cause a change in the uncollectible expense recognized of $0.1 million. The allowance for uncollectible accounts receivable is a reduction to Accounts Receivable on the Consolidated Balance Sheets and is included in Other Operation and Maintenance Expense on the Consolidated Statements of Income. The allowance for uncollectible accounts receivable was $1.6 million and $1.9 million at December 31, 2014 and 2013, respectively.
Accounting Pronouncements
See Note 2 of Notes to Consolidated Financial Statements for discussion of a current accounting pronouncement that is applicable to the Company.
Commitments and Contingencies
In the normal course of business, the Company is confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other appropriate experts to assess the claim. If, in management's opinion, the Company has incurred a probable loss as set forth by GAAP, an estimate is made of the loss and the appropriate accounting entries are reflected in the Company's Consolidated Financial Statements. At the present time, based on currently available information, the Company believes that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to its financial statements and would not have a material adverse effect on the Company's consolidated financial position, results of operations or cash flows. See Notes 14 and 15 of Notes to Consolidated Financial Statements and Item 3 of Part I in this Form 10-K for a discussion of the Company's commitments and contingencies.
Environmental Laws and Regulations
The activities of the Company are subject to numerous, stringent and complex Federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact OG&E's business activities in many ways including the handling or disposal of waste material, future construction activities to avoid or mitigate harm to
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threatened or endangered species and requiring the installation and operation of emissions pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. OG&E believes that its operations are in substantial compliance with current Federal, state and local environmental standards.
Environmental regulation can increase the cost of planning, design, initial installation and operation of OG&E's facilities. Historically, OG&E's total expenditures for environmental control facilities and for remediation have not been significant in relation to its consolidated financial position or results of operations. The Company believes, however, that it is reasonably likely that the trend in environmental legislation and regulations will continue towards more restrictive standards. Compliance with these standards is expected to increase the cost of conducting business. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market.
OG&E expects that environmental expenditures necessary to comply with the environmental laws and regulations discussed below will qualify as part of a pre-approval plan to handle state and Federally mandated environmental upgrades which will be recoverable in Oklahoma from OG&E's retail customers under House Bill 1910, which was enacted into law in May 2005.
It is estimated that OG&E's total expenditures to comply with environmental laws, regulations and requirements for 2015 will be approximately $136.0 million, of which $116.0 million is for capital expenditures. It is estimated that OG&E's total expenditures to comply with environmental laws, regulations and requirements for 2016 will be approximately $159.0 million, of which $139.0 million is for capital expenditures. The amounts for OG&E above include capital expenditures for low NOX burners, activated carbon injection and scrubbers.
Air
Federal Clean Air Act Overview
OG&E’s operations are subject to the Federal Clean Air Act as amended, and comparable state laws and regulations. These laws and regulations regulate emissions of air pollutants from various industrial sources, including electric generating units, and also impose various monitoring and reporting requirements. Such laws and regulations may require that OG&E obtain pre-approval for the construction or modification of certain projects or facilities expected to produce air emissions or result in the increase of existing air emissions, obtain and strictly comply with air permits containing various emissions and operational limitations or install emission control equipment. OG&E likely will be required to incur certain capital expenditures in the future for air pollution control equipment and technology in connection with obtaining and maintaining operating permits and approvals for air emissions.
Regional Haze Control Measures
The EPA's 2005 regional haze rule is intended to protect visibility in certain national parks and wilderness areas throughout the United States that may be impacted by air pollutant emissions.
On February 18, 2010, Oklahoma submitted its SIP to the EPA, which set forth the state's plan for compliance with the Federal regional haze rule. The SIP was subject to the EPA's review and approval.
The Oklahoma SIP included requirements for reducing emissions of NOX and SO2 from OG&E's seven BART-eligible units at the Seminole, Muskogee and Sooner generating stations. The SIP also included a waiver from BART requirements for all eligible units at the Horseshoe Lake generating station based on air modeling that showed no significant impact on visibility in nearby national parks and wilderness areas. The SIP concluded that BART for reducing NOX emissions at all of the subject units should be the installation of low NOX burners with overfired air (flue gas recirculation was also required on two of the units) and set forth associated NOX emission rates and limits.
On December 28, 2011, the EPA issued a final rule in which it rejected the SO 2 portion of the Oklahoma SIP and issued a FIP its place. OG&E and the State of Oklahoma's subsequent appeal of the FIP with the Tenth Circuit of Appeals and the U.S. Supreme Court ended on May 27, 2014 when the Supreme Court denied OG&E's Petition for Certiorari, upholding the EPA's FIP for SO 2. The FIP compliance date is now January 4, 2019.
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On August 6, 2014, OG&E filed an application with the OCC for approval of its plan to comply with EPA’s MATS and Regional Haze FIP while serving the best long-term interests of customers in light of future environmental uncertainties. The application seeks approval of the environmental compliance plan and for a recovery mechanism for the associated costs. The environmental compliance plan includes installing dry scrubbers at Sooner Units 1 and 2 and the conversion of Muskogee Units 4 and 5 to natural gas. The application also asks the Commission to predetermine the prudence of replacing OG&E's soon-to-be retired Mustang steam turbines in late 2017 (approximately 460 MW) with 400 MW of new, efficient combustion turbines at the Mustang site in 2018 and 2019 and approval for a recovery mechanism for the associated costs. OG&E estimates the total capital cost associated with its environmental compliance plan included in this application to be approximately $1.1 billion. The OCC hearing on OG&E's application is scheduled to commence on March 3, 2015. Multiple parties advocating a variety of positions have intervened in the proceeding. OG&E expects a ruling from the OCC in the second quarter of 2015. At this time, OG&E cannot predict the outcome of the proceeding. OG&E plans to file applications in the first quarter of 2015 seeking related approvals from the APSC.
Cross-State Air Pollution Rule
In August 2011, the EPA published its Cross-State Air Pollution Rule that would require 27 states to reduce power plant emissions that contribute to ozone and particulate matter pollution in other states. In December 2011, the EPA published a supplemental Cross-State Air Pollution Rule, which would make six additional states, including Oklahoma, subject to the Cross-State Air Pollution Rule for NOX emissions during the ozone-season from May 1 through September 30. Under the rule, OG&E would have been required to reduce ozone-season NOX emissions from its electrical generating units within the state beginning in 2012. In response to legal challenges of the final rule on December 30, 2011, the U.S. Court of Appeals issued a stay of the rule, which includes the supplemental rule, pending a decision on the merits. By order dated August 21, 2012, the Court of Appeals vacated the Cross-State Air Pollution Rule and ordered the EPA to promulgate a replacement rule. On April 29, 2014, the U.S. Supreme Court reversed the decision by the Court of Appeals. On October 23, 2014, the Court of Appeals for the District of Columbia Circuit granted the EPA's request that the court lift the stay of the Cross-State Air Pollution Rules. The EPA subsequently clarified that compliance with the Cross-State Air Pollution Rule would begin in 2015 using the amount of allowances originally scheduled to be available in 2012. OG&E already has installed low NOx burners on many of its generating units, and OG&E is continuing to evaluate what additional measures, if any, will be needed for compliance with the rule. In the meantime, the petitions for review of the Cross-State Air Pollution Rule and the supplemental rule remain pending before the DC Circuit Court of Appeals for consideration of issues not addressed by the Supreme Court's decision.
Hazardous Air Pollutants Emission Standards
On April 16, 2012, regulations governing emissions of certain hazardous air pollutants from electric generating units were published as the final MATS rule. To comply with this rule, OG&E is currently planning to utilize activated carbon injection for the removal of mercury at each of its five coal-fired units, the capital costs of which are estimated to be approximately $20 million over a three year period and are included in the capital expenditures table in "Future Capital Requirements and Financing Activities" above. The final MATS rule has been appealed by several parties and is now before the US Supreme Court. OG&E is not a party to the appeals and cannot predict the outcome of any such appeals.
Federal Clean Air Act New Source Review Litigation
As previously reported, in July 2008, OG&E received a request for information from the EPA regarding Federal Clean Air Act compliance at OG&E's Muskogee and Sooner generating plants.
On July 8, 2013, the Department of Justice filed a complaint against OG&E in United States District Court for the Western District of Oklahoma alleging that OG&E did not follow the Federal Clean Air Act procedures for projecting emission increases attributable to eight projects that occurred between 2003 and 2006. This complaint seeks to have OG&E submit a new assessment of whether the projects were likely to result in a significant emissions increase. The Sierra Club intervened in this proceeding. On August 30, 2013, the Government filed a Motion for Summary Judgment and on September 6, 2013, OG&E filed a Motion to Dismiss the case. On January 15, 2015, U.S. District Judge Timothy DeGuisti dismissed the complaints filed by EPA and Sierra Club. The Court held that it lacked subject matter jurisdiction over Plaintiffs’ claims because Plaintiffs failed to present an actual “case or controversy” as required by Article III of the Constitution. The court also ruled in the alternative that, even if Plaintiffs had presented a case or controversy, it would have nonetheless “decline[d] to exercise jurisdiction.” EPA and the Sierra Club have until March 16, 2015 to file an appeal of the Court’s ruling.
On August 12, 2013, the Sierra Club filed a separate complaint against OG&E in the United States District Court for the Eastern District of Oklahoma alleging that OG&E projects at Muskogee Unit 6 in 2008 were made without obtaining a prevention of significant deterioration permit and that the plant had exceeded emissions limits for opacity and particulate matter. The Sierra
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Club seeks a permanent injunction preventing OG&E from operating the Muskogee generating plant. On March 4, 2014, the Eastern District dismissed the prevention of significant deterioration permit claim based on the statute of limitations, but allowed the opacity and particulate matter claims to proceed. To obtain the right to appeal this decision, the Sierra Club subsequently withdrew a Notice of Intent to Sue for additional Clean Air Act violations and asked the Eastern District to dismiss its remaining claims with prejudice. On August 27, 2014, the Eastern District granted the Sierra Club's request. The Sierra Club has filed a Notice of Appeal with the 10th Circuit where oral argument is currently scheduled for March 18, 2015.
At this time, OG&E continues to believe that it has acted in compliance with the Federal Clean Air Act, and OG&E expects to vigorously defend against the claims that have been asserted. If OG&E does not prevail in the remainder of the proceedings, the EPA and the Sierra Club could seek to require OG&E to install additional pollution control equipment, including scrubbers, baghouses and selective catalytic reduction systems with capital costs in excess of $1.1 billion and pay fines and significant penalties as a result of the allegations in the notice of violation. Section 113 of the Federal Clean Air Act (along with the Federal Civil Penalties Inflation Adjustment Act of 1996) provides for civil penalties as much as $37,500 per day for each violation. Due to the uncertain and preliminary nature of this litigation, OG&E cannot provide a range of reasonably possible loss in this case.
National Ambient Air Quality Standards
The EPA is required to set NAAQS for certain pollutants considered to be harmful to public health or the environment. The Clean Air Act requires the EPA to review each NAAQS every five years. As a result of these reviews, the EPA periodically has taken action to adopt more stringent NAAQS for those pollutants. If any areas of Oklahoma were to be designated as not attaining the NAAQS for a particular pollutant, the Company could be required to install additional emission controls on its facilities to help the state achieve attainment with the NAAQS. As of the end of 2014, no areas of Oklahoma had been designated as non-attainment for pollutants that are likely to affect the Company's operations. Several processes are under way to designate areas in Oklahoma as attaining or not attaining revised NAAQS. The Company is monitoring those processes and their possible impact on its operations but, at this time, cannot determine with any certainty whether they will cause a material impact to the Company's financial results.
Climate Change and Greenhouse Gas Emissions
There is continuing discussion and evaluation of possible global climate change in certain regulatory and legislative arenas. The focus is generally on emissions of greenhouse gases, including carbon dioxide, sulfur hexafluoride and methane, and whether these emissions are contributing to the warming of the Earth's atmosphere. There are various international agreements that restrict greenhouse gas emissions, but none of them have a binding effect on sources located in the United States. The U.S. Congress has not passed legislation to reduce emissions of greenhouse gases and the future prospects for any such legislation are uncertain, but the EPA believes it has existing authority under the Clean Air Act to regulate greenhouse gas emissions from stationary sources. Several states have passed laws, adopted regulations or undertaken regulatory initiatives to reduce the emission of greenhouse gases, primarily through the planned development of greenhouse gas emission inventories and/or regional greenhouse gas cap and trade programs. Oklahoma and Arkansas are not among them. If legislation or regulations are passed at the Federal or state levels in the future requiring mandatory reductions of carbon dioxide and other greenhouse gases on the Company's facilities, this could result in significant additional compliance costs that would affect the Company’s future financial position, results of operations and cash flows if such costs are not recovered through regulated rates.
In 2009, the EPA adopted a comprehensive national system for reporting emissions of carbon dioxide and other greenhouse gases produced by major sources in the United States. The reporting requirements apply to large direct emitters of greenhouse gases with emissions equal to or greater than a threshold of 25,000 metric tons per year, which includes certain OG&E facilities. OG&E also reports quarterly its carbon dioxide emissions from generating units subject to the Federal Acid Rain Program. OG&E has submitted the reports required by the applicable reporting rules.
In January 2014, the EPA used the Clean Air Act authority and re-proposed New Source Performance Standards that specify permissible levels of greenhouse gas emissions from newly-constructed fossil fuel-fired electric generating units. The proposed New Source Performance Standards set separate standards for natural gas combined cycle units and coal-fired generating units.
The EPA published proposed standards for existing units on June 18, 2014. As proposed by the rule, states must then submit their individual plans for reducing power plants' greenhouse gas emissions to EPA between June 2016 and June 2018 depending on whether they choose to develop a compliance plan as an individual state or as a group of states. In Oklahoma, the proposal sets a target of 43 percent reduction in the carbon emissions rate (lb/MWh) from existing sources. EPA received over 3.5 million comments on this proposal including comments from OG&E.
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On January 7, 2015, EPA announced that it will simultaneously finalize the proposed rules for new and existing sources to an unspecified date during the summer of 2015. With these rules, EPA also plans to propose a federal plan for States to achieve the emissions targets in the existing-unit rule which States could adopt rather than developing their own state plans. EPA expects to issue a final federal plan in the summer of 2016. As proposed rules, OG&E is unable to assess the impact to OG&E at this time however continues to monitor the rule’s development.
On June 23, 2014, the U.S. Supreme Court issued an opinion rejecting the EPA’s determination that its regulation of greenhouse gas emissions from new motor vehicles triggered permitting requirements under the Clean Air Act for stationary sources that emit greenhouse gases. However, the Court held that EPA can require best available control technology for greenhouse gas emissions from sources otherwise subject to review under the Prevention of Significant Deterioration program. The opinion is not expected to have a direct impact on OG&E because none of its sources has been, or is expected to be, required to undergo such a review for greenhouse gas emissions.
It is not possible to determine what the legal standards for greenhouse gas emissions will be in the future. Nonetheless, OG&E’s current business strategy will result in a reduced carbon emissions rate compared to current levels. As discussed in “Pending Regulatory Matters”, OG&E has filed an application with the OCC for approval of its plan to comply with EPA’s MATS and Regional Haze FIP by converting two coal-fired generating units at Muskogee Station to natural gas, among other measures. OG&E’s deployment of Smart Grid technology helps to reduce the peak load demand. OG&E also seeks to utilize renewable energy sources that do not emit greenhouse gases. OG&E's service territory borders one of the nation's best wind resource areas. OG&E has leveraged its geographic position to develop renewable energy resources and transmission to deliver the renewable energy. The SPP has begun to authorize the construction of transmission lines capable of bringing renewable energy out of the wind resource area in western Oklahoma, the Texas Panhandle and western Kansas to load centers by planning for more transmission to be built in the area. In addition to increasing overall system reliability, these new transmission resources should provide greater access to additional wind resources that are currently constrained due to existing transmission delivery limitations.
Endangered Species
Certain Federal laws, including the Bald and Golden Eagle Protection Act, the Migratory Bird Treaty Act and the Endangered Species Act, provide special protection to certain designated species. These laws and any state equivalents provide for significant civil and criminal penalties for unpermitted activities that result in harm to or harassment of certain protected animals and plants, including damage to their habitats. If such species are located in an area in which the Company conducts operations, or if additional species in those areas become subject to protection, the Company’s operations and development projects, particularly transmission, wind or pipeline projects, could be restricted or delayed, or the Company could be required to implement expensive mitigation measures. The U.S. Fish and Wildlife Service announced a proposed rule to list the lesser prairie chicken as threatened on November 30, 2012. The decision applies to a 5-state area including parts of Oklahoma where OG&E has undertaken the development of certain large transmission projects. On March 10, 2014, the Company enrolled in the Western Association of Fish and Wildlife Agencies’ Range-Wide Conservation Plan for the lesser prairie chicken. This Range-Wide Conservation Plan consists of industry-specific conservation practices that apply to projects and activities in the impacted area. The Range-Wide Conservation Plan has been approved by the U.S. Fish and Wildlife Service and incorporated as part of the agency’s final decision on March 27, 2014 to list the lesser prairie chicken as a threatened species.
Air Quality Control System
On September 10, 2014, OG&E executed a contract for the design, engineering and fabrication of two circulating dry scrubber systems to be installed at Sooner Units 1 and 2. OG&E entered into an agreement on February 9, 2015, to install the scrubber systems. The scrubbers are part of OG&E’s Environmental Compliance Plan and scheduled to be completed by 2019. More detail regarding the Environmental Plan can be found under the “Pending Regulatory Matters” section of "Notes to Consolidated Financial Statements" of Part II, Item 8 of this Form 10-K.
Waste
OG&E's operations generate wastes that are subject to the Federal Resource Conservation and Recovery Act of 1976 as well as comparable state laws which impose detailed requirements for the handling, storage, treatment and disposal of waste.
On December 19, 2014, EPA finalized a rule under the Federal Resource Conservation and Recovery Act for the handling and disposal of coal combustion residuals or coal ash. The final rule regulates coal ash as a solid waste rather than a hazardous waste, which would have made the management of coal ash more costly. OG&E operations are regulated by this rule however; OG&E is still currently evaluating the potential impacts of the final rule and as such, cannot yet assess the cost of compliance from the rule.
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The Company has sought and will continue to seek pollution prevention opportunities and to evaluate the effectiveness of its waste reduction, reuse and recycling efforts. In 2014, the Company obtained refunds of $3.4 million from the recycling of scrap metal, salvaged transformers and used transformer oil. This figure does not include the additional savings gained through the reduction and/or avoidance of disposal costs and the reduction in material purchases due to the reuse of existing materials. Similar savings are anticipated in future years.
Water
OG&E's operations are subject to the Federal Clean Water Act, and comparable state laws and regulations. These laws and regulations impose detailed requirements and strict controls regarding the discharge of pollutants into state and Federal waters.
In March 2011, the EPA proposed rules to implement Section 316(b) of the Federal Clean Water Act, which requires that power plant cooling water intake structure location, design, construction and capacity reflect the best available technology for minimizing their adverse environmental impact via the impingement and entrainment of aquatic organisms. The EPA issued a final rule on May 19, 2014. OG&E is currently evaluating the impacts of the final rule and plans to seek state approval of the compliance plan in 2015, at which point in time OG&E expects to be able to provide a reasonable estimate of any material costs associated with the rule.
Site Remediation
The Comprehensive Environmental Response, Compensation and Liability Act of 1980 and comparable state laws impose liability, without regard to the legality of the original conduct, on certain classes of persons responsible for the release of hazardous substances into the environment. Because OG&E utilizes various products and generate wastes that are considered hazardous substances for purposes of the Comprehensive Environmental Response, Compensation and Liability Act of 1980, OG&E could be subject to liability for the costs of cleaning up and restoring sites where those substances have been released to the environment. At this time, it is not anticipated that any associated liability will cause a significant impact to OG&E.
For a further discussion regarding contingencies relating to environmental laws and regulations, see Note 14 of Notes to Consolidated Financial Statements.
Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
Market risks are, in most cases, risks that are actively traded in a marketplace and have been well studied in regards to quantification. Market risks include, but are not limited to, changes in interest rates and commodity prices. The Company's exposure to changes in interest rates relates primarily to short-term variable-rate debt and commercial paper. The Company is exposed to commodity prices in its operations.
Risk Oversight Committee
Management monitors market risks using a risk committee structure. The Company's Risk Oversight Committee, which consists primarily of corporate officers, is responsible for the overall development, implementation and enforcement of strategies and policies for all market risk management activities of the Company. This committee's emphasis is a holistic perspective of risk measurement and policies targeting the Company's overall financial performance. On a quarterly basis, the Risk Oversight Committee reports to the Audit Committee of the Company's Board of Directors on the Company's risk profile affecting anticipated financial results, including any significant risk issues.
The Company also has a Corporate Risk Management Department. This group, in conjunction with the aforementioned committees, is responsible for establishing and enforcing the Company's risk policies.
Risk Policies
Management utilizes risk policies to control the amount of market risk exposure. These policies are designed to provide the Audit Committee of the Company's Board of Directors and senior executives of the Company with confidence that the risks taken on by the Company's business activities are in accordance with their expectations for financial returns and that the approved policies and controls related to market risk management are being followed.
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Interest Rate Risk
The Company's exposure to changes in interest rates primarily relates to short-term variable-rate debt and commercial paper. The Company manages its interest rate exposure by monitoring and limiting the effects of market changes in interest rates. The Company may utilize interest rate derivatives to alter interest rate exposure in an attempt to reduce the effects of these changes. Interest rate derivatives are used solely to modify interest rate exposure and not to modify the overall leverage of the debt portfolio.
The fair value of the Company's long-term debt is based on quoted market prices and estimates of current rates available for similar issues with similar maturities or by calculating the net present value of the monthly payments discounted by the Company's current borrowing rate. The following table shows the Company's long-term debt maturities and the weighted-average interest rates by maturity date.

Year ended December 31 (Dollars in millions) | 2015 | 2016 | 2017 | 2018 | 2019 | Thereafter | Total | 12/31/14 Fair Value
Fixed-rate debt (A) |  |  |  |  |  |  |  |
Principal amount | $ | 0.2 |  | $ | 110.2 |  | $ | 125.1 |  | $ | 250.1 |  | $ | 250.1 |  | $ | 1,794.5 |  | $ | 2,530.2 |  | $ | 2,968.0 |
Weighted-average interest rate | 3.02 | % | 5.15 | % | 6.50 | % | 6.35 | % | 8.25 | % | 5.20 | % | 5.67 | % |
Variable-rate debt (B) |  |  |  |  |  |  |  |
Principal amount | $ | — |  | $ | — |  | $ | 100.0 |  | $ | — |  | $ | — |  | $ | 135.4 |  | $ | 235.4 |  | $ | 235.3 |
Weighted-average interest rate | — | % | — | % | 0.78 | % | — | % | — | % | 0.07 | % | 0.38 | % |

(A) | Prior to or when these debt obligations mature, the Company may refinance all or a portion of such debt at then-existing market interest rates which may be more or less than the interest rates on the maturing debt.

(B) | A hypothetical change of 100 basis points in the underlying variable interest rate incurred by the Company would change interest expense by $2.4 million annually through 2017 and $1.4 million thereafter.

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Item 8. Financial Statements and Supplementary Data.
OGE ENERGY CORP.
CONSOLIDATED STATEMENTS OF INCOME

Year ended December 31 (In millions except per share data) | 2014 | 2013 | 2012
OPERATING REVENUES |  |  |
Electric Utility | $ | 2,453.1 |  | $ | 2,259.7 |  | $ | 2,128.7 |
Natural Gas Midstream Operations (Note 1) | — |  | 608.0 |  | 1,542.5 |
Total operating revenues | 2,453.1 |  | 2,867.7 |  | 3,671.2 |
COST OF SALES |  |  |
Electric Utility | 1,106.6 |  | 950.0 |  | 831.4 |
Natural Gas Midstream Operations (Note 1) | — |  | 478.9 |  | 1,087.3 |
Total cost of sales | 1,106.6 |  | 1,428.9 |  | 1,918.7 |
OPERATING EXPENSES |  |  |
Other operation and maintenance | 439.6 |  | 489.2 |  | 601.5 |
Depreciation and amortization | 281.4 |  | 297.3 |  | 371.4 |
Gain on insurance proceeds | — |  | — |  | (7.5 | )
Taxes other than income | 88.7 |  | 98.8 |  | 110.2 |
Total operating expenses | 809.7 |  | 885.3 |  | 1,075.6 |
OPERATING INCOME | 536.8 |  | 553.5 |  | 676.9 |
OTHER INCOME (EXPENSE) |  |  |
Equity in earnings of unconsolidated affiliates (Note 1) | 172.6 |  | 101.9 |  | — |
Allowance for equity funds used during construction | 4.2 |  | 6.6 |  | 6.2 |
Other income | 17.8 |  | 31.8 |  | 17.6 |
Other expense | (14.4 | ) | (22.2 | ) | (16.5 | )
Net other income | 180.2 |  | 118.1 |  | 7.3 |
INTEREST EXPENSE |  |  |
Interest on long-term debt | 144.6 |  | 145.6 |  | 158.9 |
Allowance for borrowed funds used during construction | (2.4 | ) | (3.4 | ) | (3.5 | )
Interest on short-term debt and other interest charges | 6.2 |  | 5.3 |  | 8.7 |
Interest expense | 148.4 |  | 147.5 |  | 164.1 |
INCOME BEFORE TAXES | 568.6 |  | 524.1 |  | 520.1 |
INCOME TAX EXPENSE | 172.8 |  | 130.3 |  | 135.1 |
NET INCOME | 395.8 |  | 393.8 |  | 385.0 |
Less: Net income attributable to noncontrolling interests | — |  | 6.2 |  | 30.0 |
NET INCOME ATTRIBUTABLE TO OGE ENERGY | $ | 395.8 |  | $ | 387.6 |  | $ | 355.0 |
BASIC AVERAGE COMMON SHARES OUTSTANDING | 199.2 |  | 198.2 |  | 197.1 |
DILUTED AVERAGE COMMON SHARES OUTSTANDING | 199.9 |  | 199.4 |  | 198.1 |
BASIC EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS | $ | 1.99 |  | $ | 1.96 |  | $ | 1.80 |
DILUTED EARNINGS PER AVERAGE COMMON SHARES ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS | $ | 1.98 |  | $ | 1.94 |  | $ | 1.79 |
DIVIDENDS DECLARED PER COMMON SHARE | $ | 0.95000 |  | $ | 0.85125 |  | $ | 0.79750 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
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OGE ENERGY CORP.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

Year ended December 31 (In millions) | 2014 | 2013 | 2012
Net income | $ | 395.8 |  | $ | 393.8 |  | $ | 385.0 |
Other comprehensive income (loss), net of tax |  |  |
Pension Plan and Restoration of Retirement Income Plan: |  |  |
Amortization of deferred net loss, net of tax of $1.2, $2.4 and $1.7, respectively | 1.8 |  | 3.7 |  | 3.0 |
Net gain (loss) arising during the period, net of tax of ($7.0), $7.8 and ($5.6), respectively | (11.1 | ) | 12.4 |  | (10.2 | )
Amortization of prior service cost, net of tax of $0, $0 and $0.2, respectively | — |  | — |  | 0.2 |
Settlement (Curtailment) cost, net of tax of ($0.1), $1.9 and $0, respectively | (0.1 | ) | 3.0 |  | — |
Postretirement Benefit Plans: |  |  |
Amortization of deferred net loss, net of tax of $0.5, $1.3 and ($1.1), respectively | 0.9 |  | 2.0 |  | 2.0 |
Net gain (loss) arising during the period, net of tax of ($1.9), $4.4 and ($1.1), respectively | (3.1 | ) | 6.9 |  | (2.3 | )
Amortization of deferred net transition obligation, net of tax of $0, $0 and $0.1, respectively | — |  | — |  | 0.1 |
Amortization of prior service cost, net of tax of ($1.1), ($1.1) and ($1.0), respectively | (1.8 | ) | (1.8 | ) | (1.8 | )
Deferred commodity contracts hedging (gains) losses reclassified in net income, net of tax of $0, $0.4 and ($1.6), respectively | — |  | 0.6 |  | (3.6 | )
Deferred commodity contracts hedging gains (losses), net of tax of $0, $0 and $0.1, respectively | — |  | — |  | 0.4 |
Amortization of deferred interest rate swap hedging losses, net of tax of $0.1, $0.1 and $0.2, respectively | 0.2 |  | 0.3 |  | 0.2 |
Other comprehensive income, net of tax | (13.2 | ) | 27.1 |  | (12.0 | )
Comprehensive income | 382.6 |  | 420.9 |  | 373.0 |
Less: Comprehensive income attributable to noncontrolling interests | — |  | 6.3 |  | 26.5 |
Less: Deconsolidation of Enogex Holdings | — |  | 6.1 |  | — |
Total comprehensive income attributable to OGE Energy | $ | 382.6 |  | $ | 408.5 |  | $ | 346.5 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
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OGE ENERGY CORP.
CONSOLIDATED STATEMENTS OF CASH FLOWS

Year ended December 31 (In millions) | 2014 | 2013 | 2012
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ | 395.8 |  | $ | 393.8 |  | $ | 385.0 |
Adjustments to reconcile net income to net cash provided from operating activities |  |  |
Depreciation and amortization | 281.4 |  | 298.6 |  | 375.2 |
Deferred income taxes and investment tax credits, net | 177.3 |  | 125.9 |  | 143.7 |
Equity in earnings of unconsolidated affiliates | (172.6 | ) | (101.9 | ) | — |
Distributions from unconsolidated affiliates | 143.7 |  | 51.7 |  | — |
Allowance for equity funds used during construction | (4.2 | ) | (6.6 | ) | (6.2 | )
(Gain) Loss on disposition of assets | (0.2 | ) | (8.6 | ) | 4.2 |
Gain on insurance proceeds | — |  | — |  | (7.5 | )
Stock-based compensation | (2.7 | ) | (3.5 | ) | (2.6 | )
Regulatory assets | 4.6 |  | 26.8 |  | 20.3 |
Regulatory liabilities | (4.4 | ) | (32.5 | ) | (14.8 | )
Other assets | (16.3 | ) | 1.3 |  | (6.9 | )
Other liabilities | 29.6 |  | (7.0 | ) | (14.3 | )
Change in certain current assets and liabilities |  |  |
Accounts receivable, net | (9.4 | ) | (34.0 | ) | 27.1 |
Accounts receivable - unconsolidated affiliates | 6.8 |  | 3.7 |  | — |
Accrued unbilled revenues | 3.2 |  | (1.3 | ) | 1.9 |
Income taxes receivable | (10.4 | ) | 1.6 |  | 1.1 |
Fuel, materials and supplies inventories | 20.4 |  | 5.1 |  | 13.7 |
Fuel clause under recoveries | (42.1 | ) | (26.2 | ) | 1.8 |
Other current assets | (2.7 | ) | (4.5 | ) | (8.6 | )
Accounts payable | (64.0 | ) | 56.9 |  | 25.1 |
Fuel clause over recoveries | (0.4 | ) | (108.8 | ) | 101.5 |
Other current liabilities | (11.8 | ) | (7.3 | ) | 6.4 |
Net Cash Provided from Operating Activities | 721.6 |  | 623.2 |  | 1,046.1 |
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Capital expenditures (less allowance for equity funds used during construction) | (569.3 | ) | (990.6 | ) | (1,150.6 | )
Return of capital - Equity method investments | 9.5 |  | — |  | — |
Proceeds from sale of assets | 0.7 |  | 36.3 |  | 1.5 |
Investment in unconsolidated affiliates | — |  | (2.7 | ) | — |
Acquisition of gathering assets | — |  | — |  | (78.6 | )
Proceeds from insurance | — |  | — |  | 7.6 |
Reimbursement of capital expenditures | — |  | — |  | 27.5 |
Net Cash Used in Investing Activities | (559.1 | ) | (957.0 | ) | (1,192.6 | )
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Proceeds from long-term debt | 588.9 |  | 247.4 |  | 250.0 |
Issuance of common stock | 13.2 |  | 14.2 |  | 14.3 |
Dividends paid on common stock | (184.1 | ) | (165.5 | ) | (154.5 | )
Payment of long-term debt | (240.2 | ) | (0.1 | ) | (0.1 | )
(Decrease) increase in short-term debt | (341.6 | ) | 8.7 |  | 153.8 |
Changes in advances with unconsolidated affiliates | — |  | 129.6 |  | — |
Contributions from noncontrolling interest partners | — |  | 107.0 |  | 46.2 |
Repayment of line of credit | — |  | — |  | (150.0 | )
Purchase of treasury stock | — |  | — |  | (3.4 | )
Distributions to noncontrolling interest partners | — |  | (2.5 | ) | (12.6 | )
Net Cash (Used in) Provided from Financing Activities | (163.8 | ) | 338.8 |  | 143.7 |
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | (1.3 | ) | 5.0 |  | (2.8 | )
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 6.8 |  | 1.8 |  | 4.6 |
CASH AND CASH EQUIVALENTS AT END OF PERIOD | $ | 5.5 |  | $ | 6.8 |  | $ | 1.8 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
77

OGE ENERGY CORP.
CONSOLIDATED BALANCE SHEETS

December 31 (In millions) | 2014 | 2013
ASSETS |  |
CURRENT ASSETS |  |
Cash and cash equivalents | $ | 5.5 |  | $ | 6.8 |
Accounts receivable, less reserve of $1.6 and $1.9, respectively | 188.8 |  | 179.4 |
Accounts receivable - unconsolidated affiliates | 5.6 |  | 12.4 |
Accrued unbilled revenues | 55.5 |  | 58.7 |
Income taxes receivable | 16.0 |  | 5.6 |
Fuel inventories | 58.5 |  | 74.4 |
Materials and supplies, at average cost | 78.9 |  | 80.7 |
Deferred income taxes | 191.4 |  | 215.8 |
Fuel clause under recoveries | 68.3 |  | 26.2 |
Other | 37.3 |  | 34.6 |
Total current assets | 705.8 |  | 694.6 |
OTHER PROPERTY AND INVESTMENTS |  |
Investment in unconsolidated affiliates | 1,318.2 |  | 1,298.8 |
Other | 70.1 |  | 61.0 |
Total other property and investments | 1,388.3 |  | 1,359.8 |
PROPERTY, PLANT AND EQUIPMENT |  |
In service | 9,983.0 |  | 9,183.1 |
Construction work in progress | 115.9 |  | 468.5 |
Total property, plant and equipment | 10,098.9 |  | 9,651.6 |
Less accumulated depreciation | 3,119.0 |  | 2,978.8 |
Net property, plant and equipment | 6,979.9 |  | 6,672.8 |
DEFERRED CHARGES AND OTHER ASSETS |  |
Regulatory assets | 411.5 |  | 379.1 |
Other | 42.3 |  | 28.4 |
Total deferred charges and other assets | 453.8 |  | 407.5 |
TOTAL ASSETS | $ | 9,527.8 |  | $ | 9,134.7 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
78

OGE ENERGY CORP.
CONSOLIDATED BALANCE SHEETS (Continued)

December 31 (In millions) | 2014 | 2013
LIABILITIES AND STOCKHOLDERS' EQUITY |  |
CURRENT LIABILITIES |  |
Short-term debt | $ | 98.0 |  | $ | 439.6 |
Accounts payable | 179.1 |  | 251.0 |
Dividends payable | 49.9 |  | 44.7 |
Customer deposits | 73.7 |  | 70.9 |
Accrued taxes | 39.7 |  | 39.9 |
Accrued interest | 43.0 |  | 43.4 |
Accrued compensation | 38.2 |  | 56.9 |
Long-term debt due within one year | — |  | 100.0 |
Other | 51.7 |  | 47.4 |
Total current liabilities | 573.3 |  | 1,093.8 |
LONG-TERM DEBT | 2,755.3 |  | 2,300.1 |
DEFERRED CREDITS AND OTHER LIABILITIES |  |
Accrued benefit obligations | 315.5 |  | 241.5 |
Deferred income taxes | 2,268.3 |  | 2,125.3 |
Regulatory liabilities | 263.0 |  | 234.2 |
Other | 108.0 |  | 102.7 |
Total deferred credits and other liabilities | 2,954.8 |  | 2,703.7 |
Total liabilities | 6,283.4 |  | 6,097.6 |
COMMITMENTS AND CONTINGENCIES (NOTE 14) |  |
STOCKHOLDERS' EQUITY |  |
Common stockholders' equity | 1,087.6 |  | 1,073.6 |
Retained earnings | 2,198.2 |  | 1,991.7 |
Accumulated other comprehensive loss, net of tax | (41.4 | ) | (28.2 | )
Total stockholders' equity | 3,244.4 |  | 3,037.1 |
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | $ | 9,527.8 |  | $ | 9,134.7 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
79

OGE ENERGY CORP.
CONSOLIDATED STATEMENTS OF CAPITALIZATION

December 31 (In millions) | 2014 | 2013
STOCKHOLDERS' EQUITY |  |
Common stock, par value $0.01 per share; authorized 450.0 shares; and outstanding 199.4 and 198.5 shares, respectively | $ | 2.0 |  | $ | 2.0 |
Premium on common stock | 1,085.6 |  | 1,071.6 |
Retained earnings | 2,198.2 |  | 1,991.7 |
Accumulated other comprehensive loss, net of tax | (41.4 | ) | (28.2 | )
Total stockholders' equity | 3,244.4 |  | 3,037.1 |
LONG-TERM DEBT |  |
SERIES | DUE DATE |  |
Senior Notes - OGE Energy |  |
5.00% | Senior Notes, Series Due November 15, 2014 | — |  | 100.0 |
0.78% | Variable Senior Notes, Series Due November 24, 2017 | 100.0 |  | — |
Unamortized discount | — |  | (0.1 | )
Senior Notes - OG&E |  |
5.15% | Senior Notes, Series Due January 15, 2016 | 110.0 |  | 110.0 |
6.50% | Senior Notes, Series Due July 15, 2017 | 125.0 |  | 125.0 |
6.35% | Senior Notes, Series Due September 1, 2018 | 250.0 |  | 250.0 |
8.25% | Senior Notes, Series Due January 15, 2019 | 250.0 |  | 250.0 |
6.65% | Senior Notes, Series Due July 15, 2027 | 125.0 |  | 125.0 |
6.50% | Senior Notes, Series Due April 15, 2028 | 100.0 |  | 100.0 |
6.50% | Senior Notes, Series Due August 1, 2034 | — |  | 140.0 |
5.75% | Senior Notes, Series Due January 15, 2036 | 110.0 |  | 110.0 |
6.45% | Senior Notes, Series Due February 1, 2038 | 200.0 |  | 200.0 |
5.85% | Senior Notes, Series Due June 1, 2040 | 250.0 |  | 250.0 |
5.25% | Senior Notes, Series Due May 15, 2041 | 250.0 |  | 250.0 |
3.90% | Senior Notes, Series Due May 1, 2043 | 250.0 |  | 250.0 |
4.55% | Senior Notes, Series Due March 15, 2044 | 250.0 |  | — |
4.00% | Senior Notes, Series Due December 15, 2044 | 250.0 |  | — |
3.70% | Tinker Debt, Due August 31, 2062 | 10.2 |  | 10.3 |
Other Bonds - OG&E |  |
0.07% - 0.20% | Garfield Industrial Authority, January 1, 2025 | 47.0 |  | 47.0 |
0.07% - 0.18% | Muskogee Industrial Authority, January 1, 2025 | 32.4 |  | 32.4 |
0.04% - 0.15% | Muskogee Industrial Authority, June 1, 2027 | 56.0 |  | 56.0 |
Unamortized discount | (10.3 | ) | (5.5 | )
Total long-term debt | 2,755.3 |  | 2,400.1 |
Less long-term debt due within one year | — |  | (100.0 | )
Total long-term debt (excluding debt due within one year) | 2,755.3 |  | 2,300.1 |
Total Capitalization (including long-term debt due within one year) | $ | 5,999.7 |  | $ | 5,437.2 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
80

OGE ENERGY CORP.
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

(In millions) | Common Stock | Premium on Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interest | Treasury Stock | Total
Balance at December 31, 2011 | $ | 1.0 |  | $ | 1,034.3 |  | $ | 1,574.8 |  | $ | (40.6 | ) | $ | 256.0 |  | $ | (6.2 | ) | $ | 2,819.3 |
Net income | — |  | — |  | 355.0 |  | — |  | 30.0 |  | — |  | 385.0 |
Other comprehensive income, net of tax | — |  | — |  | — |  | (8.5 | ) | (3.5 | ) | — |  | (12.0 | )
Dividends declared on common stock | — |  | — |  | (157.4 | ) | — |  | — |  | — |  | (157.4 | )
Issuance of common stock | — |  | 14.3 |  | — |  | — |  | — |  | — |  | 14.3 |
Stock-based compensation | — |  | (8.7 | ) | — |  | — |  | (0.2 | ) | 6.1 |  | (2.8 | )
Contributions from noncontrolling interest partners | — |  | 10.7 |  | — |  | — |  | 35.5 |  | — |  | 46.2 |
Distributions to noncontrolling interest partners | — |  | — |  | — |  | — |  | (12.6 | ) | — |  | (12.6 | )
Deferred income taxes attributable to contributions from noncontrolling interest partners | — |  | (4.2 | ) | — |  | — |  | — |  | — |  | (4.2 | )
Purchase of treasury stock | — |  | — |  | — |  | — |  | — |  | (3.4 | ) | (3.4 | )
Balance at December 31, 2012 | $ | 1.0 |  | $ | 1,046.4 |  | $ | 1,772.4 |  | $ | (49.1 | ) | $ | 305.2 |  | $ | (3.5 | ) | $ | 3,072.4 |
Net income | — |  | — |  | 387.6 |  | — |  | 6.2 |  | — |  | 393.8 |
Other comprehensive income, net of tax | — |  | — |  | — |  | 27.0 |  | 0.1 |  | — |  | 27.1 |
Dividends declared on common stock | — |  | — |  | (168.8 | ) | — |  | — |  | — |  | (168.8 | )
Issuance of common stock | — |  | 14.2 |  | — |  | — |  | — |  | — |  | 14.2 |
Stock-based compensation | — |  | (1.8 | ) | — |  | — |  | (0.8 | ) | 3.5 |  | 0.9 |
Contributions from noncontrolling interest partners | — |  | 22.5 |  | — |  | — |  | 84.5 |  | — |  | 107.0 |
Distributions to noncontrolling interest partners | — |  | — |  | — |  | — |  | (2.5 | ) | — |  | (2.5 | )
Deconsolidation of Enogex Holdings | — |  | — |  | 0.5 |  | (6.1 | ) | (392.7 | ) | — |  | (398.3 | )
Deferred income taxes attributable to contributions from noncontrolling interest partners | — |  | (8.7 | ) | — |  | — |  | — |  | — |  | (8.7 | )
2-for-1 forward stock split | 1.0 |  | (1.0 | ) | — |  | — |  | — |  | — |  | — |
Balance at December 31, 2013 | $ | 2.0 |  | $ | 1,071.6 |  | $ | 1,991.7 |  | $ | (28.2 | ) | $ | — |  | $ | — |  | $ | 3,037.1 |
Net income | — |  | — |  | 395.8 |  | — |  | — |  | — |  | 395.8 |
Other comprehensive income, net of tax | — |  | — |  | — |  | (13.2 | ) | — |  | — |  | (13.2 | )
Dividends declared on common stock | — |  | — |  | (189.3 | ) | — |  | — |  | — |  | (189.3 | )
Issuance of common stock | — |  | 13.2 |  | — |  | — |  | — |  | — |  | 13.2 |
Stock-based compensation | — |  | 0.8 |  | — |  | — |  | — |  | — |  | 0.8 |
Balance at December 31, 2014 | $ | 2.0 |  | $ | 1,085.6 |  | $ | 2,198.2 |  | $ | (41.4 | ) | $ | — |  | $ | — |  | $ | 3,244.4 |

The accompanying Notes to Consolidated Financial Statements are an integral part hereof.
81

OGE ENERGY CORP.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. | Summary of Significant Accounting Policies

Organization
The Company is an energy and energy services provider offering physical delivery and related services for both electricity and natural gas primarily in the south central United States. The Company conducts these activities through two business segments: (i) electric utility and (ii) natural gas midstream operations. The accounts of OGE Energy and its wholly owned and majority owned subsidiaries are included in the consolidated financial statements. All intercompany transactions and balances are eliminated in consolidation. OGE Energy generally uses the equity method of accounting for investments where its ownership interest is between 20% and 50% and has the ability to exercise significant influence.
The electric utility segment generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are conducted through OG&E and are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory, and is a wholly owned subsidiary of the Company. OG&E is the largest electric utility in Oklahoma and its franchised service territory includes the Fort Smith, Arkansas area. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business.
The natural gas midstream operations segment currently represents the Company's investment in Enable through its wholly owned subsidiary OGE Holdings. Enable is engaged in the business of gathering, processing, transporting and storing natural gas. Enable's natural gas gathering and processing assets are strategically located in four states and serve natural gas production from shale developments in the Anadarko, Arkoma and Ark-La-Tex basins. Enable also owns an emerging crude oil gathering business in the Bakken shale formation, principally located in the Williston basin. Enable's natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois. For periods prior to the formation of Enable, the natural gas midstream operations segment reflected the consolidated results of Enogex Holdings. All significant intercompany transactions have been eliminated in consolidation.
Enable was formed effective May 1, 2013 by OGE Energy, the ArcLight group and CenterPoint Energy, Inc. to own and operate the midstream businesses of OGE Energy and CenterPoint. In the formation transaction, OGE Energy and ArcLight contributed Enogex LLC to Enable and the Company deconsolidated its previously held investment in Enogex Holdings and acquired an equity interest in Enable. The Company's contribution of Enogex LLC to Enable met the requirements of being in substance real estate and was recorded at historical cost. The general partner of Enable is equally controlled by CenterPoint and OGE Energy, who each have 50 percent management ownership. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, OGE Energy began accounting for its interest in Enable using the equity method of accounting.
On April 16, 2014, Enable completed an initial public offering of 25,000,000 common units resulting in Enable becoming a publicly traded Master Limited Partnership. In connection with Enable’s initial public offering, approximately 61.4 percent of OGE Holdings and CenterPoint’s common units were converted into subordinated units. As a result, following the initial public offering, OGE Holdings owned 42,832,291 common units and 68,150,514 subordinated units of Enable. Holders of subordinated units are not entitled to receive any distribution of available cash until the common units have received the minimum quarterly distribution plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. The subordinated units will convert into common units when Enable has paid at least the minimum quarterly distribution for three years or paid at least 150 percent of the minimum quarterly distribution for one year.
On January 26, 2015, Enable announced a quarterly dividend distribution of $0.30875 per unit on its outstanding common and subordinated units, representing an increase of approximately 2.1 percent over the prior quarter distribution. Enable's gross margins are affected by commodity price movements. Based on forward commodity prices, Enable expects to see a change in producer activity that will affect its future distribution growth rate. If cash distributions to Enable’s unitholders exceed $0.330625 per unit in any quarter, the general partner will receive increasing percentages, up to 50 percent, of the cash Enable distributes in excess of that amount. OGE Holdings is entitled to 60 percent of those “incentive distributions.” In certain circumstances, the general partner, will have the right to reset the minimum quarterly distribution and the target distribution levels at which the incentive distributions receive increasing percentages to higher levels based on Enable’s cash distributions at the time of the exercise of this reset election.
At December 31, 2014, OGE Energy held 26.3 percent of the limited partner interests in Enable.
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OGE Energy charges operating costs to OG&E and Enable based on several factors. Operating costs directly related to OG&E and Enable are assigned as such. Operating costs incurred for the benefit of OG&E and Enable are allocated either as overhead based primarily on labor costs or using the "Distrigas" method. The Distrigas method is a three-factor formula that uses an equal weighting of payroll, net operating revenues and gross property, plant and equipment. OGE Energy adopted the Distrigas method in January 1996 as a result of a recommendation by the OCC Staff. OGE Energy believes this method provides a reasonable basis for allocating common expenses.
Basis of Presentation
In the opinion of management, all adjustments necessary to fairly present the consolidated financial position of the Company at December 31, 2014 and 2013 and the results of its operations and cash flows for the years ended December 31, 2014, 2013 and 2012, have been included and are of a normal recurring nature except as otherwise disclosed.
Accounting Records
The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated utility, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment.
OG&E records certain incurred costs and obligations as regulatory assets or liabilities if it is probable, based on regulatory orders or other available evidence, that the cost or obligation will be included in amounts allowable for recovery or refund in future rates.
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The following table is a summary of OG&E's regulatory assets and liabilities at:

December 31 (In millions) | 2014 | 2013
Regulatory Assets |  |
Current |  |
Fuel clause under recoveries | $ | 68.3 |  | $ | 26.2 |
Oklahoma demand program rider under recovery (A) | 19.7 |  | 10.6 |
Crossroads wind farm rider under recovery (A) | — |  | 4.7 |
Other (A) | 9.1 |  | 7.3 |
Total Current Regulatory Assets | $ | 97.1 |  | $ | 48.8 |
Non-Current |  |
Benefit obligations regulatory asset | $ | 261.1 |  | $ | 227.4 |
Income taxes recoverable from customers, net | 56.1 |  | 56.5 |
Smart Grid | 43.9 |  | 44.2 |
Deferred storm expenses | 17.5 |  | 21.6 |
Unamortized loss on reacquired debt | 16.1 |  | 11.8 |
Pension tracker | — |  | 1.4 |
Other | 16.8 |  | 16.2 |
Total Non-Current Regulatory Assets | $ | 411.5 |  | $ | 379.1 |
Regulatory Liabilities |  |
Current |  |
Smart Grid rider over recovery (B) | $ | 12.5 |  | $ | 16.7 |
Crossroads wind farm rider over recovery (B) | 10.3 |  | — |
Other (B) | 1.6 |  | 3.5 |
Total Current Regulatory Liabilities | $ | 24.4 |  | $ | 20.2 |
Non-Current |  |
Accrued removal obligations, net | $ | 248.1 |  | $ | 227.7 |
Pension tracker | 14.9 |  | — |
Deferred pension credits | — |  | 6.5 |
Total Non-Current Regulatory Liabilities | $ | 263.0 |  | $ | 234.2 |

(A) | Included in Other Current Assets on the Consolidated Balance Sheets.

(B) | Included in Other Current Liabilities on the Consolidated Balance Sheets.

Fuel clause under recoveries are generated from under recoveries from OG&E's customers when OG&E's cost of fuel exceeds the amount billed to its customers. Fuel clause over recoveries are generated from over recoveries from OG&E's customers when the amount billed to its customers exceeds OG&E's cost of fuel. OG&E's fuel recovery clauses are designed to smooth the impact of fuel price volatility on customers' bills. As a result, OG&E under recovers fuel costs in periods of rising fuel prices above the baseline charge for fuel and over recovers fuel costs when prices decline below the baseline charge for fuel. Provisions in the fuel clauses are intended to allow OG&E to amortize under and over recovery balances.
OG&E recovers program costs related to the Demand and Energy Efficiency Program. An extension of the demand program rider was approved in December 2012, which allows for the recovery of demand program costs, lost revenues associated with certain achieved energy, demand savings and performance based incentives and the recovery of costs associated with research and development investments through December 2015.
OG&E recovers a return on the capital expenditures along with operation and maintenance expense and depreciation expense related to the Crossroads wind farm through riders established by the OCC and APSC. OG&E began recovery in the fourth quarter of 2011 in Oklahoma and June of 2013 in Arkansas, and believes the rider will continue until new rates are implemented in OG&E's next general rate case in each jurisdiction.
The benefit obligations regulatory asset is comprised of expenses recorded which are probable of future recovery and that have not yet been recognized as components of net periodic benefit cost, including net loss and prior service cost. These expenses are recorded as a regulatory asset as OG&E had historically recovered and currently recovers pension and postretirement
84

benefit plan expense in its electric rates. If, in the future, the regulatory bodies indicate a change in policy related to the recovery of pension and postretirement benefit plan expenses, this could cause the benefit obligations regulatory asset balance to be reclassified to Accumulated other comprehensive income.
The following table is a summary of the components of the benefit obligations regulatory asset at:

December 31 (In millions) | 2014 | 2013
Pension Plan and Restoration of Retirement Income Plan |  |
Net loss | $ | 196.7 |  | $ | 178.4 |
Prior service cost | 0.6 |  | 2.5 |
Postretirement Benefit Plans |  |
Net loss | 83.6 |  | 79.9 |
Prior service cost | (19.8 | ) | (33.4 | )
Total | $ | 261.1 |  | $ | 227.4 |

The following amounts in the benefit obligations regulatory asset at December 31, 2014 are expected to be recognized as components of net periodic benefit cost in 2015:

(In millions) |
Pension Plan and Restoration of Retirement Income Plan |
Net loss | $ | 12.7 |
Prior service cost | 0.5 |
Postretirement Benefit Plans |
Net loss | 11.8 |
Prior service cost | (13.7 | )
Total | $ | 11.3 |

Income taxes recoverable from customers, which represents income tax benefits previously used to reduce OG&E's revenues, are treated as regulatory assets and liabilities and are being amortized over the estimated remaining life of the assets to which they relate. These amounts are being recovered in rates as the temporary differences that generated the income tax benefit turn around. The income tax related regulatory assets and liabilities are netted in Income taxes recoverable from customers, net in the regulatory assets and liabilities table above.
OG&E recovers the cost of system-wide deployment of smart grid technology and implementing the smart grid pilot program, the incremental costs for web portal access, education and providing home energy reports. These amounts are currently being recovered through a rider which will remain in effect until the smart grid project costs are included in base rates in OG&E's next general rate case. Costs not included in the rider are the incremental costs for web portal access, education and home energy reports, which are capped at $6.9 million, and the stranded costs associated with OG&E's analog electric meters, which have been replaced by smart meters, which were accumulated during the smart grid deployment and have been included in the Smart Grid asset in the Regulatory Assets/Liabilities table above. These costs are expected to be recovered in base rates in OG&E's next general rate case.
OG&E defers annual Oklahoma storm-related operation and maintenance expenses in excess of $2.7 million and includes in expense any Oklahoma storm-related operation and maintenance expenses up to $2.7 million. OG&E will recover the amounts deferred each year, over a five-year period.
Unamortized loss on reacquired debt is comprised of unamortized debt issuance costs related to the early retirement of OG&E's long-term debt. These amounts are recorded in interest expenses and are being amortized over the term of the long-term debt which replaced the previous long-term debt. The unamortized loss on reacquired debt is not included in OG&E's rate base and does not otherwise earn a rate of return.
Accrued removal obligations represent asset retirement costs previously recovered from ratepayers for other than legal obligations.
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OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate cases. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate case as a regulatory asset or regulatory liability. These amounts have been recorded in the Pension tracker in the regulatory assets and liabilities table above.
Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets, which could have significant financial effects.
Use of Estimates
In preparing the Consolidated Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Changes to these assumptions and estimates could have a material effect on the Company's Consolidated Financial Statements. However, the Company believes it has taken reasonable positions where assumptions and estimates are used in order to minimize the negative financial impact to the Company that could result if actual results vary from the assumptions and estimates. In management's opinion, the areas of the Company where the most significant judgment is exercised for all Company segments includes the determination of Pension Plan assumptions, income taxes, contingency reserves, asset retirement obligations and depreciable lives of property, plant and equipment. For the electric utility segment, the most significant judgment is also exercised in the existence of regulatory assets and liabilities and unbilled revenues.
Cash and Cash Equivalents
For purposes of the Consolidated Financial Statements, the Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. These investments are carried at cost, which approximates fair value.
Allowance for Uncollectible Accounts Receivable
Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is calculated by multiplying the last six months of electric revenue by the provision rate. The provision rate is based on a 12-month historical average of actual balances written off. To the extent the historical collection rates are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable was $1.6 million and $1.9 million at December 31, 2014 and 2013, respectively.
New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers, whose outside credit scores indicate an elevated risk, are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit.
Fuel Inventories
Fuel inventories for the generation of electricity consist of coal, natural gas and oil. OG&E uses the weighted-average cost method of accounting for inventory that is physically added to or withdrawn from storage or stockpiles. The amount of fuel inventory was $66.7 million and $74.4 million at December 31, 2014 and 2013, respectively. Effective May 1, 2014, the gas storage services agreement with Enable was terminated. As a result of this contract termination, approximately 5.3 BCF of cushion gas owned by OG&E on the Enable system is being directed to OG&E's power plants over a five year period during peak time of June 1 to August 31 at a rate of 11,500 MMBtu/day for a total of 1.06 Bcf per year. Therefore, approximately $11.0 million of cushion gas was reclassified from Plant-in-Service to Deferred Charges and Other Assets and an additional $2.7 million was reclassified to current Fuel Inventories on the Balance Sheets. As of December 31, 2014, the balance of cushion gas in Other Assets is approximately $8.2 million.
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Property, Plant and Equipment
All property, plant and equipment is recorded at cost. Newly constructed plant is added to plant balances at cost which includes contracted services, direct labor, materials, overhead, transportation costs and the allowance for funds used during construction. Replacements of units of property are capitalized as plant. For assets that belong to a common plant account, the replaced plant is removed from plant balances and the cost of such property is charged to Accumulated Depreciation. For assets that do not belong to a common plant account, the replaced plant is removed from plant balances with the related accumulated depreciation and the remaining balance net of any salvage proceeds is recorded as a loss in the Consolidated Statements of Income as Other Expense. Repair and replacement of minor items of property are included in the Consolidated Statements of Income as Other Operation and Maintenance Expense.
The table below presents OG&E's ownership interest in the jointly-owned McClain Plant and the jointly-owned Redbud Plant, and, as disclosed below, only OG&E's ownership interest is reflected in the property, plant and equipment and accumulated depreciation balances in these tables. The owners of the remaining interests in the McClain Plant and the Redbud Plant are responsible for providing their own financing of capital expenditures. Also, only OG&E's proportionate interests of any direct expenses of the McClain Plant and the Redbud Plant such as fuel, maintenance expense and other operating expenses are included in the applicable financial statement captions in the Consolidated Statement of Income.

December 31, 2014 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment
McClain Plant (A) | 77 | % | $ | 207.7 |  | $ | 46.6 |  | $ | 161.1 |
Redbud Plant (A)(B) | 51 | % | $ | 484.1 |  | $ | 81.8 |  | $ | 402.3 |

(A) | Construction work in progress was $0.5 million and $0.4 million for the McClain and Redbud Plants, respectively.

(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million.

December 31, 2013 (In millions) | Percentage Ownership | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment
McClain Plant (A) | 77 | % | $ | 183.2 |  | $ | 62.8 |  | $ | 120.4 |
Redbud Plant (A)(B) | 51 | % | $ | 498.9 |  | $ | 89.7 |  | $ | 409.2 |

(A) | Construction work in progress was $0.1 million and $39.5 million for the McClain and Redbud Plants, respectively.

(B) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million.

OGE Energy Consolidated
The Company's property, plant and equipment and related accumulated depreciation are divided into the following major classes at:

December 31, 2014 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment
OGE Energy (holding company) |  |  |
Property, plant and equipment | $ | 151.7 |  | $ | 113.3 |  | $ | 38.4 |
OGE Energy property, plant and equipment | 151.7 |  | 113.3 |  | 38.4 |
OG&E |  |  |
Distribution assets | 3,559.5 |  | 1,086.7 |  | 2,472.8 |
Electric generation assets (A) | 3,620.1 |  | 1,345.1 |  | 2,275.0 |
Transmission assets (B) | 2,370.0 |  | 417.8 |  | 1,952.2 |
Intangible plant | 67.6 |  | 31.1 |  | 36.5 |
Other property and equipment | 330.0 |  | 125.0 |  | 205.0 |
OG&E property, plant and equipment | 9,947.2 |  | 3,005.7 |  | 6,941.5 |
Total property, plant and equipment | $ | 10,098.9 |  | $ | 3,119.0 |  | $ | 6,979.9 |

(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $34.3 million.

(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.4 million.

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December 31, 2013 (In millions) | Total Property, Plant and Equipment | Accumulated Depreciation | Net Property, Plant and Equipment
OGE Energy (holding company) |  |  |
Property, plant and equipment | $ | 152.4 |  | $ | 114.2 |  | $ | 38.2 |
OGE Energy property, plant and equipment | 152.4 |  | 114.2 |  | 38.2 |
OG&E |  |  |
Distribution assets | 3,403.8 |  | 1,028.2 |  | 2,375.6 |
Electric generation assets (A) | 3,551.0 |  | 1,306.1 |  | 2,244.9 |
Transmission assets (B) | 2,163.7 |  | 385.0 |  | 1,778.7 |
Intangible plant | 50.5 |  | 27.1 |  | 23.4 |
Other property and equipment | 330.2 |  | 118.2 |  | 212.0 |
OG&E property, plant and equipment | 9,499.2 |  | 2,864.6 |  | 6,634.6 |
Total property, plant and equipment | $ | 9,651.6 |  | $ | 2,978.8 |  | $ | 6,672.8 |

(A) | This amount includes a plant acquisition adjustment of $148.3 million and accumulated amortization of $28.8 million.

(B) | This amount includes a plant acquisition adjustment of $3.3 million and accumulated amortization of $0.3 million.

The following table summarizes the Company's unamortized computer software costs.

December 31 (In millions) | 2014 | 2013
OGE Energy (holding company) | $ | 4.5 |  | $ | 7.2 |
OG&E | 33.6 |  | 16.8 |
Total | $ | 38.1 |  | $ | 24.0 |

The following table summarizes the Company's amortization expense for computer software costs.

Year ended December 31 (In millions) | 2014 | 2013 | 2012
OGE Energy (holding company) | $ | 4.3 |  | $ | 6.4 |  | $ | 6.8 |
OG&E | 5.2 |  | 4.0 |  | 4.2 |
Enogex | — |  | 0.8 |  | 3.1 |
Total | $ | 9.5 |  | $ | 11.2 |  | $ | 14.1 |

Depreciation and Amortization
The provision for depreciation, which was 2.8 percent of the average depreciable utility plant for both 2014 and 2013, is provided on a straight-line method over the estimated service life of the utility assets. Depreciation is provided at the unit level for production plant and at the account or sub-account level for all other plant, and is based on the average life group method. In 2015, the provision for depreciation is projected to be 2.8 percent of the average depreciable utility plant. Amortization of intangible assets is computed using the straight-line method. Of the remaining amortizable intangible plant balance at December 31, 2014, 96.0 percent will be amortized over 9 years with 4.0 percent of the remaining amortizable intangible plant balance at December 31, 2014 being amortized over 26 years. Amortization of plant acquisition adjustments is provided on a straight-line basis over the estimated remaining service life of the acquired asset. Plant acquisition adjustments include $148.3 million for the Redbud Plant, which are being amortized over a 27-year life and $3.3 million for certain substation facilities in OG&E's service territory, which are being amortized over a 37 to 59-year period.
Investment in Unconsolidated Affiliate
OGE Energy's investment in Enable is considered to be a variable interest entity because the owners of the equity at risk in this entity have disproportionate voting rights in relation to their obligations to absorb the entity's expected losses or to receive its expected residual returns. However, OGE Energy is not considered the primary beneficiary of Enable since it does not have the power to direct the activities of Enable that are considered most significant to the economic performance of Enable. As discussed above, OGE Energy accounts for the investment in Enable using the equity method of accounting. Under the equity method, the investment will be adjusted each period for contributions made, distributions received and the Company's share of
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the investee's comprehensive income. OGE Energy's maximum exposure to loss related to Enable is limited to OGE Energy's equity investment in Enable as presented on the Company's Consolidated Balance Sheet at December 31, 2014. The Company evaluates its equity method investments for impairment when events or changes in circumstances indicate there is a loss in value of the investment that is other than a temporary decline.
The Company considers distributions received from Enable which do not exceed cumulative equity in earnings subsequent to the date of investment to be a return on investment which are classified as operating activities in the Consolidated Statements of Cash Flows. The Company considers distributions received from Enable in excess of cumulative equity in earnings subsequent to the date of investment to be a return of investment which are classified as investing activities in the Consolidated Statements of Cash Flows.
Asset Retirement Obligations
The Company has previously recorded asset retirement obligations that are being amortized over their respective lives ranging from 4 to 74 years.
The following table summarizes changes to the Company's asset retirement obligations during the years ended December 31, 2014 and 2013.

(In millions) | 2014 | 2013
Balance at January 1 | $ | 55.2 |  | $ | 54.0 |
Liabilities settled | (0.8 | ) | (0.4 | )
Accretion expense | 2.5 |  | 2.3 |
Revisions in estimated cash flows | 1.7 |  | (0.7 | )
Balance at December 31 | $ | 58.6 |  | $ | 55.2 |

Allowance for Funds Used During Construction
Allowance for funds used during construction is calculated according to the FERC pronouncements for the imputed cost of equity and borrowed funds. Allowance for funds used during construction, a non-cash item, is reflected as an increase to net other income and a reduction to interest expense in the Consolidated Statements of Income and as an increase to Construction Work in Progress in the Consolidated Balance Sheets. Allowance for funds used during construction rates, compounded semi-annually, were 6.92 percent, 8.33 percent and 8.93 percent for the years ended December 31, 2014, 2013 and 2012, respectively. The decrease in the allowance for funds used during construction rates in 2014 was primarily due to two factors. First, an increase in the average daily balance of short-term debt resulted in less equity being required to finance construction projects, which caused the equity portion of allowance for funds using during construction to decrease. Second, that same increase in the average daily balance of short-term debt allowed the interest and fixed commercial paper fees to be lower per dollar of short term debt, resulting in a lower short term debt rate which caused the debt portion of allowance for funds used during construction to decrease.
Collection of Sales Tax
In the normal course of its operations, OG&E collects sales tax from its customers. OG&E records a current liability for sales taxes when it bills its customers and eliminates this liability when the taxes are remitted to the appropriate governmental authorities. OG&E excludes the sales tax collected from its operating revenues.
Revenue Recognition
General
OG&E reads its customers' meters and sends bills to its customers throughout each month. As a result, there is a significant amount of customers' electricity consumption that has not been billed at the end of each month. Unbilled revenue is presented in Accrued Unbilled Revenues on the Consolidated Balance Sheets and in Operating Revenues on the Consolidated Statements of Income based on estimates of usage and prices during the period. The estimates that management uses in this calculation could vary from the actual amounts to be paid by customers.
T he Company deconsolidated the results of operations for Enogex LLC as of May 1, 2013. Prior to this date, operating revenues for gathering, processing, transportation and storage services for Enogex LLC were recorded each month based on the
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current month's estimated volumes, contracted prices (considering current commodity prices), historical seasonal fluctuations and any known adjustments. The estimates were reversed in the following month and customers were billed on actual volumes and contracted prices. Gas sales were calculated on current-month nominations and contracted prices. Operating revenues associated with the production of NGLs were estimated based on current-month estimated production and contracted prices. These amounts were reversed in the following month and the customers were billed on actual production and contracted prices.
Enogex, LLC recognized revenue from natural gas gathering, processing, transportation and storage services to third parties as services were provided. Revenue associated with NGLs was recognized when the production was sold.
Enogex LLC recorded deferred revenue when it received consideration from a third party before achieving certain criteria that must be met for revenue to be recognized in accordance with GAAP.
Enogex LLC engaged in asset management and hedging activities related to the purchase and sale of natural gas and NGLs. Contracts utilized in these activities generally included purchases and sales for physical delivery, over-the-counter forward swap and options contracts and exchange traded futures and options.
SPP Purchases and Sales
OG&E currently owns and operates transmission and generation facilities as part of a vertically integrated utility. OG&E is a member of the SPP regional transmission organization and has transferred operational authority, but not ownership, of OG&E's transmission facilities to the SPP. On March 1, 2014, the SPP implemented FERC approved regional day ahead and real-time markets for energy and operating services, as well as associated transmission congestion rights. Collectively the three markets operate together under the global name, SPP Integrated Marketplace. OG&E represents owned and contracted generation assets, and customer load in the SPP Integrated Marketplace for the sole benefit of its customers. OG&E has not participated in the SPP Integrated Marketplace for any speculative trading activities. OG&E records SPP Integrated Marketplace transactions as sales or purchases per FERC Order 668, which requires that purchases and sales be recorded on a net basis for each settlement period of the SPP Integrated Marketplace. These results are reported as Operating Revenues or Cost of Goods Sold in its Consolidated Financial Statements. OG&E revenues, expenses, assets and liabilities may be adversely affected by changes in the organization, operating and regulation by the FERC or the SPP.
Fuel Adjustment Clauses
The actual cost of fuel used in electric generation and certain purchased power costs are passed through to OG&E's customers through fuel adjustment clauses. The fuel adjustment clauses are subject to periodic review by the OCC, the APSC and the FERC. The OCC, the APSC and the FERC have authority to review the appropriateness of gas transportation charges or other fees OG&E pays to its affiliate, Enable.
Income Taxes
The Company file s consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. The Company uses the asset and liability method of accounting for income taxes. Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carry forwards and net operating loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. The Company recognizes interest related to unrecognized tax benefits in interest expense and recognizes penalties in other expense.
Accrued Vacation
The Company accrues vacation pay monthly by establishing a liability for vacation earned. Vacation may be taken as earned and is charged against the liability. At the end of each year, the liability represents the amount of vacation earned, but not taken.
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Accumulated Other Comprehensive Income (Loss)
The following table summarizes changes in the components of accumulated other comprehensive loss attributable to OGE Energy during 2014. All amounts below are presented net of tax.

| Pension Plan and Restoration of Retirement Income Plan |  | Postretirement Benefit Plans |  |
(In millions) | Net loss | Prior service cost |  | Net loss | Prior service cost | Deferred interest rate swap hedging losses | Total
Balance at December 31, 2013 | $ | (27.4 | ) | $ | 0.1 |  |  | $ | (5.8 | ) | $ | 5.1 |  | $ | (0.2 | ) | $ | (28.2 | )
Other comprehensive income before reclassifications | (11.1 | ) | — |  |  | (3.1 | ) | — |  | — |  | (14.2 | )
Amounts reclassified from accumulated other comprehensive income (loss)(A) | 1.7 |  | — |  |  | 0.9 |  | (1.8 | ) | 0.2 |  | 1.0 |
Net current period other comprehensive income (loss) | (9.4 | ) | — |  |  | (2.2 | ) | (1.8 | ) | 0.2 |  | (13.2 | )
Balance at December 31, 2014 | $ | (36.8 | ) | $ | 0.1 |  |  | $ | (8.0 | ) | $ | 3.3 |  | $ | — |  | $ | (41.4 | )

(A) | Includes $0.1 million of pension curtailment charges.

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The following table summarizes significant amounts reclassified out of accumulated other comprehensive loss by the respective line items in net income during the year ended December 31, 2014.

Details about Accumulated Other Comprehensive Loss Components | Amount Reclassified from Accumulated Other Comprehensive Loss | Affected Line Item in the Statement Where Net Income is Presented
| Year Ended December 31, |
(In millions) | 2014 | 2013 |
Losses on cash flow hedges |  |  |
Commodity contracts | $ | — |  | $ | (1.0 | ) | Cost of sales
Interest rate swap | (0.3 | ) | (0.4 | ) | Interest expense
| (0.3 | ) | (1.4 | ) | Total before tax
| (0.1 | ) | (0.5 | ) | Tax benefit
| $ | (0.2 | ) | $ | (0.9 | ) | Net of tax
Amortization of defined benefit pension items |  |  |
Actuarial losses | $ | (3.0 | ) | $ | (6.1 | ) | (A)
Settlement cost | 0.2 |  | (4.9 | ) | (A)
| (2.8 | ) | (11.0 | ) | Total before tax
| (1.1 | ) | (4.3 | ) | Tax benefit
| (1.7 | ) | (6.7 | ) | Net of tax
| — |  | (0.1 | ) | Noncontrolling interest
| $ | (1.7 | ) | $ | (6.6 | ) | Net of tax
Amortization of postretirement benefit plan items |  |  |
Actuarial losses | $ | (1.4 | ) | $ | (3.3 | ) | (A)
Prior service cost | 2.9 |  | 2.9 |  | (A)
| 1.5 |  | (0.4 | ) | Total before tax
| 0.6 |  | (0.2 | ) | Tax benefit
| $ | 0.9 |  | $ | (0.2 | ) | Net of tax
Total reclassifications for the period | $ | (1.0 | ) | $ | (7.7 | ) | Net of tax

(A) | These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 12 for additional information).

The amounts in accumulated other comprehensive loss at December 31, 2014 that are expected to be recognized into earnings in 2015 are as follows:

(In millions) |
Pension Plan and Restoration of Retirement Income Plan |
Net loss | $ | (5.1 | )
Postretirement Benefit Plans |
Net loss | (1.9 | )
Prior service cost | 2.9 |
Total, net of tax | $ | (4.1 | )

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Environmental Costs
Accruals for environmental costs are recognized when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are charged to expense or deferred as a regulatory asset based on expected recovery from customers in future rates, if they relate to the remediation of conditions caused by past operations or if they are not expected to mitigate or prevent contamination from future operations. Where environmental expenditures relate to facilities currently in use, such as pollution control equipment, the costs may be capitalized and depreciated over the future service periods. Estimated remediation costs are recorded at undiscounted amounts, independent of any insurance or rate recovery, based on prior experience, assessments and current technology. Accrued obligations are regularly adjusted as environmental assessments and estimates are revised, and remediation efforts proceed. For sites where OG&E has been designated as one of several potentially responsible parties, the amount accrued represents OG&E's estimated share of the cost. The Company had $7.5 million and $6.2 million in accrued environmental liabilities at December 31, 2014 and 2013, respectively, which are included in the asset retirement obligations table.

2. | Accounting Pronouncement

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" (ASC Topic 606). The new standard provides guidance for all revenue arising from contracts with customers and provides a model for the measurement and recognition of gains and losses arising from the sale of certain nonfinancial assets such as property and equipment, including real estate. The core principle of the revenue model is that an entity should recognize revenue at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to a customer. The principles of the standard will be applied in five steps:
1. Identify the contract(s) with a customer
2. Identify the performance obligations in the contract
3. Determine the transaction price
4. Allocate the transaction price to the performance obligations in the contract
5. Recognize revenue when (or as) the entity satisfies a performance obligation
The new guidance is effective for fiscal years beginning after December 15, 2016 and must be adopted using either a full retrospective approach for all periods presented or a modified retrospective approach. Early adoption is not permitted. The Company is currently evaluating the potential impact the adoption will have on its consolidated financial statements.

3. | Investment in Unconsolidated Affiliate and Related Party Transactions

On March 14, 2013, OGE Energy entered into a Master Formation Agreement with the ArcLight group and CenterPoint Energy, Inc., pursuant to which OGE Energy, the ArcLight Group and CenterPoint Energy, Inc., agreed to form Enable to own and operate the midstream businesses of OGE Energy and CenterPoint that was initially structured as a private limited partnership. This transaction closed on May 1, 2013.
Pursuant to the Master Formation Agreement, OGE Energy and the ArcLight group indirectly contributed 100 percent of the equity interests in Enogex LLC to Enable. The Company determined that its contribution of Enogex LLC to Enable met the requirements of being in substance real estate and was recorded at historical cost. Immediately prior to closing, on May 1, 2013, the ArcLight group contributed $107.0 million and OGE Energy contributed $9.1 million to Enogex LLC in order to pay down short-term debt.
The general partner of Enable is equally controlled by CenterPoint and OGE Energy, who each have 50 percent management ownership. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, OGE Energy deconsolidated its interest in Enogex Holdings LLC and began accounting for its interest in Enable using the equity method of accounting.
Pursuant to a Registration Rights Agreement dated as of May 1, 2013, OGE Energy and CenterPoint Energy, Inc. agreed to initiate the process for the sale of an equity interest in Enable in an initial public offering. On April 16, 2014, Enable completed an initial public offering of 25,000,000 common units resulting in Enable becoming a publicly traded Master Limited Partnership. The offering represented approximately 6.0 percent of the limited partner interests and raised approximately $464 million in net proceeds for Enable. In connection with the offering, underwriters exercised their option to purchase 3,750,000 additional common units which were fulfilled with units held by ArcLight. As a result of the offering, OGE Holding's ownership was reduced from 28.5 percent to 26.7 percent. On May 13, 2014, CenterPoint exercised its put right with respect to a 24.95 percent interest in SESH and pursuant to that right, on May 30, 2014, Enable issued 6,322,457 common units representing limited partner interests in Enable
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in exchange for CenterPoint's 24.95 percent interest in SESH. At December 31, 2014, OGE Energy held 26.3 percent of the limited partner interests in Enable.
CenterPoint and OGE Energy also own a 40 percent and 60 percent interest, respectively, in any incentive distribution rights to be held by the general partner of Enable following the initial public offering. See Note 1 for more information regarding incentive distributions.
Distributions received from Enable were $143.7 million during the year ended December 31, 2014.
Related Party Transactions
Operating costs charged and related party transactions between the Company and its affiliate, Enable, since its formation on May 1, 2013 are discussed below. Prior to May 1, 2013, operating costs charged and related party transactions between the Company and Enogex Holdings were eliminated in consolidation. OGE Energy's interest in Enogex Holdings was deconsolidated on May 1, 2013.
On May 1, 2013, OGE Energy and Enable entered into a Services Agreement, Employee Transition Agreement, and other agreements whereby OGE Energy agreed to provide certain support services to Enable such as accounting, legal, risk management and treasury functions for an initial term ending on April 30, 2016. The support services automatically extend year-to-year at the end of the initial term, unless terminated by Enable with at least 90 days’ notice. Enable may terminate the initial support services at any time with 180 days notice if approved by the board of Enable's general partner. Under these agreements, OGE Energy charged operating costs to Enable of $16.8 million and $17.8 million for December 31, 2014 and December 31, 2013, respectively. OGE Energy charges operating costs to OG&E and Enable based on several factors. Operating costs directly related to OG&E and Enable are assigned as such. Operating costs incurred for the benefit of OG&E and Enable are allocated either as overhead based primarily on labor costs or using the "Distrigas" method. Effective April 1, 2014, Enable’s general partner, OGE Energy and CenterPoint agreed to reduce certain governance related costs billed to Enable for transition services.
Additionally, OGE Energy agreed to provide seconded employees to Enable to support its operations for an initial term ending on December 31, 2014. OGE Energy did not transfer any employees to Enable at the formation of the partnership or any time through December 31, 2014. In October 2014, CenterPoint, OGE Energy and Enable agreed to continue the secondment to Enable for 192 OGE Energy employees that participate in OGE Energy's defined benefit and retirement plans, beyond December 31, 2014. The remaining OGE Energy seconded employees were terminated from OGE Energy on December 31, 2014 and were offered employment by Enable. OGE Energy billed Enable for reimbursement of $104.8 million and $67.7 million in 2014 and 2013, respectively, under the Transitional Seconding Agreement for employment costs incurred on or after May 1, 2013.
OGE Energy had accounts receivable from Enable of $5.6 million and $12.4 million as of December 31, 2014 and December 31, 2013, respectively, for amounts billed for transitional services, including the cost of seconded employees.
Pursuant to the transition agreements, Enable has agreed to reimburse OGE Energy for certain severance and termination costs related to the termination of OGE Energy's seconded employees.
Related Party Transactions with Enable

| Year Ended
(In millions) | December 31, 2014 | December 31, 2013
Operating Revenues: |  |
Electricity to power electric compression assets | $ | 13.3 |  | $ | 7.7 |
Cost of Sales: |  |
Natural gas transportation services | $ | 34.9 |  | $ | 23.2 |
Natural gas storage services | 4.4 |  | 8.6 |
Natural gas purchases | 8.7 |  | 14.8 |

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Summarized Financial Information of Enable
Summarized unaudited financial information for 100 percent of Enable is presented below at December 31, 2014 and for the eight months ended December 31, 2013.

Balance Sheet | Year Ended December 31,
(In millions) | 2014 | 2013
Current assets | $ | 438 |  | $ | 549 |
Non-current assets | 11,399 |  | 10,683 |
Current liabilities | 671 |  | 720 |
Non-current liabilities | 2,344 |  | 2,331 |

Income Statement | Year Ended December 31,
(In millions) | 2014 | 2013
Operating revenues | $ | 3,367 |  | $ | 2,123 |
Cost of sales | 1,914 |  | 1,241 |
Operating income | 586 |  | 322 |
Net income attributable to Enable | 530 |  | 289 |

The formation of Enable was considered a business combination, and CenterPoint Midstream was the acquirer of Enogex Holdings for accounting purposes. Under this method, the fair value of the consideration paid by CenterPoint Midstream for Enogex Holdings is allocated to the assets acquired and liabilities assumed on May 1, 2013 based on their fair value. Enogex Holdings' assets, liabilities and equity have accordingly been adjusted to estimated fair value as of May 1, 2013, resulting in an increase to Enable's equity of $2.2 billion. Due to the contribution of Enogex LLC to Enable meeting the requirements of being in substance real estate and the recording the initial investment at historical cost, the effects of the amortization and depreciation expense associated with the fair value adjustments on Enable's results of operations have been eliminated in the Company's recording of its equity in earnings of Enable.
OGE Energy recorded equity in earnings of unconsolidated affiliates of $172.6 million and $101.9 million for the twelve months ended December 31, 2014 and the eight months ended December 31, 2013, respectively. Equity in earnings of unconsolidated affiliates includes OGE Energy's share of Enable earnings adjusted for the amortization of the basis difference of OGE Energy's original investment in Enogex and its underlying equity in net assets of Enable. The basis difference is the result of the initial contribution of Enogex to Enable in May 2013, and subsequent issuances of equity by Enable, including the IPO in April 2014 and the issuance of common units for the acquisition of CenterPoint's 24.95 percent interest in SESH. The basis difference is being amortized over approximately 30 years, the average life of the assets to which the basis difference is attributed. Equity in earnings of unconsolidated affiliates is also adjusted for the elimination of the Enogex Holdings fair value adjustments, as described above.
The difference between the Company's investment in Enable and its underlying equity in the net assets of Enable was $1.0 billion as of December 31, 2014.
The following table reconciles OGE Energy's equity in earnings of its unconsolidated affiliates for the years ended December 31, 2014 and 2013.

| Year Ended December 31,
(In millions) | 2014 | 2013
OGE's share of Enable Net Income | $ | 143.1 |  | $ | 82.1 |
Amortization of basis difference | 14.0 |  | 9.4 |
Elimination of Enogex Holdings fair value and other adjustments | 15.5 |  | 10.4 |
OGE's Equity in earnings of unconsolidated affiliates | $ | 172.6 |  | $ | 101.9 |

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4. | Fair Value Measurements

The classification of the Company's fair value measurements requires judgment regarding the degree to which market data are observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows:
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date.
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk).
The Company had no financial instruments measured at fair value on a recurring basis at December 31, 2014 and December 31, 2013.
The carrying value of the financial instruments included in the Consolidated Balance Sheets approximates fair value except for long-term debt which is valued at the carrying amount. The fair value of the Company's long-term debt is based on quoted market prices and estimates of current rates available for similar issues with similar maturities and is classified as Level 2 in the fair value hierarchy. The following table summarizes the fair value and carrying amount of the Company's financial instruments at December 31, 2014 and December 31, 2013.

| 2014 | 2013
December 31 (In millions) | Carrying Amount | Fair Value | Carrying Amount | Fair Value
Long-Term Debt |  |  |  |
OG&E Senior Notes | $ | 2,509.7 |  | $ | 2,957.7 |  | $ | 2,154.5 |  | $ | 2,405.0 |
OG&E Industrial Authority Bonds | 135.4 |  | 135.4 |  | 135.4 |  | 135.4 |
OG&E Tinker Debt | 10.2 |  | 10.3 |  | 10.3 |  | 9.1 |
OGE Energy Senior Notes | 100.0 |  | 99.9 |  | 99.9 |  | 103.1 |

5. | Derivative Instruments and Hedging Activities

The Company is exposed to certain risks relating to its ongoing business operations. The primary risk managed using derivatives instruments is interest rate risk. The Company is also exposed to credit risk in its business operations.
Interest Rate Risk
The Company's exposure to changes in interest rates primarily relates to short-term variable-rate debt and commercial paper. The Company manages its interest rate exposure by monitoring and limiting the effects of market changes in interest rates. The Company may utilize interest rate derivatives to alter interest rate exposure in an attempt to reduce the effects of these changes. Interest rate derivatives are used solely to modify interest rate exposure and not to modify the overall leverage of the debt portfolio.
Credit Risk
The Company is exposed to certain credit risks relating to its ongoing business operations. Credit risk includes the risk that counterparties that owe the Company money or energy will breach their obligations. If the counterparties to these arrangements
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fail to perform, the Company may be forced to enter into alternative arrangements. In that event, the Company's financial results could be adversely affected and the Company could incur losses.
Income Statement Presentation Related to Derivative Instruments
The Company had no derivative instruments included in its Consolidated Statement of Income in 2014. The following tables present the effect of derivative instruments on the Company's Consolidated Statement of Income in 2013.
Derivatives in Cash Flow Hedging Relationships

(In millions) | Amount Recognized in Other Comprehensive Income | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) into Income | Amount Recognized in Income
Natural Gas Financial Futures/Swaps | $ | (0.2 | ) | $ | 5.2 |  | $ | — |
Interest Rate Swap | — |  | (0.2 | ) | — |
Total | $ | (0.2 | ) | $ | 5.0 |  | $ | — |

Derivatives Not Designated as Hedging Instruments

(In millions) | Amount Recognized in Income
Natural Gas Physical Purchases/Sales | $ | (6.1 | )
Natural Gas Financial Futures/Swaps | 1.0 |
Total | $ | (5.1 | )

The following tables present the effect of derivative instruments on the Company's Consolidated Statement of Income in 2012.
Derivatives in Cash Flow Hedging Relationships

(In millions) | Amount Recognized in Other Comprehensive Income | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) into Income | Amount Recognized in Income
Natural Gas Financial Futures/Swaps | $ | 0.5 |  | $ | 5.2 |  | $ | — |
Interest Rate Swap | — |  | (0.4 | ) | — |
Total | $ | 0.5 |  | $ | 4.8 |  | $ | — |

Derivatives Not Designated as Hedging Instruments

(In millions) | Amount Recognized in Income
Natural Gas Physical Purchases/Sales | $ | (11.7 | )
Natural Gas Financial Futures/Swaps | 1.1 |
Total | $ | (10.6 | )

For derivatives designated as cash flow hedges in the tables above, amounts reclassified from Accumulated Other Comprehensive Income (Loss) into income (effective portion) and amounts recognized in income (ineffective portion) for the year ended December 31, 2012, if any, are reported in Operating Revenues. For derivatives not designated as hedges in the tables above, amounts recognized in income for the year ended December 31, 2012, if any, are reported in Operating Revenues.

6. | Stock-Based Compensation

In 2013, the Company adopted, and its shareowners approved, the 2013 Stock Incentive Plan. The 2013 Plan replaced the 2008 Plan and no further awards will be granted under the 2008 Plan. Under the 2013 Stock Incentive Plan, restricted stock, restricted stock units, stock options, stock appreciation rights and performance units may be granted to officers, directors and other
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key employees of the Company and its subsidiaries. The Company has authorized the issuance of up to 7,400,000 shares under the 2013 Stock Incentive Plan.
The following table summarizes the Company's pre-tax compensation expense and related income tax benefit for the year s ended December 31, 2014, 2013 and 2012 related to the Company's performance units and restricted stock.

Year ended December 31 (In millions) | 2014 | 2013 | 2012
Performance units |  |  |
Total shareholder return | $ | 8.3 |  | $ | 8.4 |  | $ | 8.0 |
Earnings per share | 3.7 |  | 2.3 |  | 4.2 |
Total performance units | 12.0 |  | 10.7 |  | 12.2 |
Restricted stock | — |  | 0.4 |  | 0.6 |
Total compensation expense | 12.0 |  | 11.1 |  | 12.8 |
Less: Amount paid by unconsolidated affiliates | 3.6 |  | 3.1 |  | — |
Net compensation expense | $ | 8.4 |  | $ | 8.0 |  | $ | 12.8 |
Income tax benefit | $ | 3.3 |  | $ | 3.1 |  | $ | 4.9 |

The Company has issued new shares to satisfy stock option exercises, restricted stock grants and payouts of earned performance units. In 2014, 2013 and 2012, there were 494,637 shares, 548,344 shares and 849,110 shares, respectively, of new common stock issued pursuant to the Company's stock incentive plans related to exercised stock options, restricted stock grants (net of forfeitures) and payouts of earned performance units. In 2014, there were 2,901 shares of restricted stock returned to the Company to satisfy tax liabilities.
Performance Units
Under the Stock Incentive Plan, the Company has issued performance units which represent the value of one share of the Company's common stock. The performance units provide for accelerated vesting if there is a change in control (as defined in the Stock Incentive Plan). Each performance unit is subject to forfeiture if the recipient terminates employment with the Company or a subsidiary prior to the end of the three-year award cycle for any reason other than death, disability or retirement. In the event of death, disability or retirement, a participant will receive a prorated payment based on such participant's number of full months of service during the award cycle, further adjusted based on the achievement of the performance goals during the award cycle.
The performance units granted based on total shareholder return are contingently awarded and will be payable in shares of the Company's common stock subject to the condition that the number of performance units, if any, earned by the employees upon the expiration of a three-year award cycle (i.e., three-year cliff vesting period) is dependent on the Company's total shareholder return ranking relative to a peer group of companies. The performance units granted based on earnings per share are contingently awarded and will be payable in shares of the Company's common stock based on the Company's earnings per share growth over a three-year award cycle (i.e., three-year cliff vesting period) compared to a target set at the time of the grant by the Compensation Committee of the Company's Board of Directors. All of these performance units are classified as equity in the Consolidated Balance Sheet. If there is no or only a partial payout for the performance units at the end of the award cycle, the unearned performance units are cancelled. Payout requires approval of the Compensation Committee of the Company's Board of Directors. Payouts, if any, are all made in common stock and are considered made when the payout is approved by the Compensation Committee.
As a result of the formation of Enable on May 1, 2013, performance unit grants to OGE Holdings' employees that were previously based on earnings before interest, taxes, depreciation and amortization were converted to performance units based on total shareholder return or earnings per share. Total 2013 performance unit grants converted were 91,390, comprised of 45,596 total shareholder return performance units with a $25.89 grant date fair value and 45,794 earnings per share performance units with a $26.73 grant date fair value. Total 2012 performance unit grants converted were 82,930, comprised of 41,554 total shareholder return performance units with a $47.71 grant date fair value and 41,376 earnings per share performance units with a $34.94 grant date fair value. The amount of these performance units were adjusted for the effects of the stock split. The impact of the modification of the performance unit grants on stock-based compensation expense for 2013 was not material.
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Performance Units – Total Shareholder Return
The fair value of the performance units based on total shareholder return was estimated on the grant date using a lattice-based valuation model that factors in information, including the expected dividend yield, expected price volatility, risk-free interest rate and the probable outcome of the market condition, over the expected life of the performance units. Compensation expense for the performance units is a fixed amount determined at the grant date fair value and is recognized over the three-year award cycle regardless of whether performance units are awarded at the end of the award cycle. Dividends were not accrued or paid for awards prior to February 2014, and were therefore not included in the fair value calculation. Beginning with the February 2014 performance unit awards, dividends are accrued on a quarterly basis pending achievement of payout criteria, and were therefore included in the fair value calculations. Expected price volatility is based on the historical volatility of the Company's common stock for the past three years and was simulated using the Geometric Brownian Motion process. The risk-free interest rate for the performance unit grants is based on the three-year U.S. Treasury yield curve in effect at the time of the grant. The expected life of the units is based on the non-vested period since inception of the award cycle. There are no post-vesting restrictions related to the Company's performance units based on total shareholder return. The number of performance units granted based on total shareholder return and the assumptions used to calculate the grant date fair value of the performance units based on total shareholder return are shown in the following table.

| 2014 | 2013 | 2012
Number of units granted | 219,106 |  | 316,162 |  | 338,678 |
Fair value of units granted | $ | 34.80 |  | $ | 25.89 |  | $ | 25.91 |
Expected dividend yield | 2.5 | % | 2.8 | % | 3.0 | %
Expected price volatility | 20.0 | % | 20.0 | % | 22.0 | %
Risk-free interest rate | 0.67 | % | 0.37 | % | 0.38 | %
Expected life of units (in years) | 2.86 |  | 2.84 |  | 2.87 |

Performance Units – Earnings Per Share
The fair value of the performance units based on earnings per share is based on grant date fair value which is equivalent to the price of one share of the Company's common stock on the date of grant. The fair value of performance units based on earnings per share varies as the number of performance units that will vest is based on the grant date fair value of the units and the probable outcome of the performance condition. The Company reassesses at each reporting date whether achievement of the performance condition is probable and accrues compensation expense if and when achievement of the performance condition is probable. As a result, the compensation expense recognized for these performance units can vary from period to period. There are no post-vesting restrictions related to the Company's performance units based on earnings per share. The number of performance units granted based on earnings per share and the grant date fair value are shown in the following table.

| 2014 | 2013 | 2012
Number of units granted | 73,037 |  | 74,570 |  | 81,594 |
Fair value of units granted | $ | 34.81 |  | $ | 26.73 |  | $ | 23.82 |

Restricted Stock
Under the Stock Incentive Plan and beginning in 2008, the Company issued restricted stock to certain existing non-officer employees as well as other executives upon hire to attract and retain individuals to be competitive in the marketplace. The restricted stock vests in one-third annual increments. Prior to vesting, each share of restricted stock is subject to forfeiture if the recipient ceases to render substantial services to the Company or a subsidiary for any reason other than death, disability or retirement. These shares may not be sold, assigned, transferred or pledged and are subject to a risk of forfeiture.
The fair value of the restricted stock was based on the closing market price of the Company's common stock on the grant date. Compensation expense for the restricted stock is a fixed amount determined at the grant date fair value and is recognized as services are rendered by employees over a three-year vesting period. Also, the Company treats its restricted stock as multiple separate awards by recording compensation expense separately for each tranche whereby a substantial portion of the expense is recognized in the earlier years in the requisite service period. Dividends are accrued and paid during the vesting period on all restricted stock awards prior to July 2014, and therefore included in the fair value calculation. For all awards after July 2014, dividends will only be paid on any restricted stock awards that vest, accordingly dividends are no longer included in the fair value calculations. The expected life of the restricted stock is based on the non-vested period since inception of the three-year award
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cycle. There are no post-vesting restrictions related to the Company's restricted stock. The number of shares of restricted stock granted and the grant date fair value are shown in the following table.

| 2014 | 2013 | 2012
Shares of restricted stock granted | 7,037 |  | 5,940 |  | 10,824 |
Fair value of restricted stock granted | $ | 35.71 |  | $ | 29.71 |  | $ | 26.72 |

A summary of the activity for the Company's performance units and restricted stock at December 31, 2014 and changes in 2014 are shown in the following table.

| Performance Units |  |
| Total Shareholder Return | Earnings Per Share | Restricted Stock
(dollars in millions) | Number of Units |  | Aggregate Intrinsic Value | Number of Units |  | Aggregate Intrinsic Value | Number of Shares | Aggregate Intrinsic Value
Units/Shares Outstanding at 12/31/13 | 1,062,060 |  |  |  | 354,026 |  |  |  | 23,628 |  |
Granted | 219,106 |  | (A) |  | 73,037 |  | (A) |  | 7,037 |  |
Converted | (355,078 | ) | (B) | $ | 19.3 |  | (118,350 | ) | (B) | $ | 8.0 |  | N/A |  |
Vested | N/A |  |  |  | N/A |  |  |  | (7,876 | ) | $ | 0.3 |
Forfeited | (33,097 | ) |  |  | (11,026 | ) |  |  | (10,288 | ) |
Units/Shares Outstanding at 12/31/14 | 892,991 |  |  | $ | — |  | 297,687 |  |  | $ | 8.0 |  | 12,501 |  | $ | 0.4 |
Units/Shares Fully Vested at 12/31/14 | 336,147 |  |  | $ | — |  | 111,950 |  |  | $ | 4.8 |  |  |

(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target.

(B) | These amounts represent performance units that vested at December 31, 2013 which were settled in February 2014.

A summary of the activity for the Company's non-vested performance units and restricted stock at December 31, 2014 and changes in 2014 are shown in the following table.

| Performance Units |  |
| Total Shareholder Return | Earnings Per Share | Restricted Stock
| Number of Units |  | Weighted-Average Grant Date Fair Value | Number of Units |  | Weighted-Average Grant Date Fair Value | Number of Shares | Weighted-Average Grant Date Fair Value
Units/Shares Non-Vested at 12/31/13 | 706,982 |  |  | $ | 25.90 |  | 235,676 |  |  | $ | 25.28 |  | 23,628 |  | $ | 26.30 |
Granted | 219,106 |  | (A) | $ | 34.80 |  | 73,037 |  | (A) | $ | 34.81 |  | 7,037 |  | $ | 35.71 |
Vested | (336,147 | ) |  | $ | 28.61 |  | (111,950 | ) |  | $ | 27.93 |  | (7,876 | ) | $ | 26.82 |
Forfeited | (33,097 | ) |  | $ | 27.02 |  | (11,026 | ) |  | $ | 26.85 |  | (10,288 | ) | $ | 24.65 |
Units/Shares Non-Vested at 12/31/14 | 556,844 |  |  | $ | 29.38 |  | 185,737 |  |  | $ | 29.90 |  | 12,501 |  | $ | 32.65 |
Units/Shares Expected to Vest | 503,991 |  | (B) |  | 167,807 |  | (B) |  | 12,501 |  |

(A) | For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from 0 percent to 200 percent of the target.

(B) | The intrinsic value of the performance units based on total shareholder return and earnings per share is $0.0 million and $6.2 million, respectively.

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Fair Value of Vested Performance Units and Restricted Stock
A summary of the Company's fair value for its vested performance units and restricted stock is shown in the following table.

Year ended December 31 (In millions) | 2014 | 2013 | 2012
Performance units |  |  |
Total shareholder return | $ | 9.5 |  | $ | 8.2 |  | $ | 7.4 |
Earnings per share | 3.8 |  | 4.9 |  | 4.1 |
Restricted stock | 0.2 |  | 0.7 |  | 0.7 |

Unrecognized Compensation Cost
A summary of the Company's unrecognized compensation cost for its non-vested performance units and restricted stock and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table.

December 31, 2014 | Unrecognized Compensation Cost (in millions) | Weighted Average to be Recognized (in years)
Performance units |  |
Total shareholder return | $ | 7.2 |  | 1.63
Earnings per share | 2.0 |  | 1.76
Total performance units | 9.2 |  |
Restricted stock | 0.2 |  | 2.47
Total | $ | 9.4 |  |

Stock Options
The Company last issued stock options in 2004 and as of December 31, 2006, all stock options were fully vested and expensed. All stock options had a contractual life of 10 years.
A summary of the activity for the Company's exercised stock options in 2013 and 2012 are shown in the following table.

Year ended December 31 (In millions) | 2013 | 2012
Intrinsic value (A) | $ | 1.4 |  | $ | 2.0 |
Cash received from stock options exercised | 0.4 |  | 0.8 |

(A) | The difference between the market value on the date of exercise and the option exercise price.

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7. | Supplemental Cash Flow Information

The following table discloses information about investing and financing activities that affected recognized assets and liabilities but which did not result in cash receipts or payments. Also disclosed in the table is cash paid for interest, net of interest capitalized, and cash paid for income taxes, net of income tax refunds.

Year ended December 31 (In millions) | 2014 | 2013 | 2012
NON-CASH INVESTING AND FINANCING ACTIVITIES |  |  |
Installment payments for Tinker electric distribution system | $ | — |  | $ | — |  | $ | 10.6 |
Power plant long-term service agreement | — |  | 9.7 |  | — |
Investment in Enable (Note 3) | — |  | 1,248.6 |  | — |
SUPPLEMENTAL CASH FLOW INFORMATION |  |  |
Cash Paid During the Period for |  |  |
Interest (net of interest capitalized) (A) | $ | 150.8 |  | $ | 151.1 |  | $ | 161.3 |
Income taxes (net of income tax refunds) | 0.2 |  | (1.1 | ) | (9.1 | )

(A) | Net of interest capitalized of $2.4 million, $5.4 million and $8.0 million in 2014, 2013 and 2012, respectively.

8. | Income Taxes

The items comprising income tax expense are as follows:

Year ended December 31 (In millions) | 2014 | 2013 | 2012
Provision (Benefit) for Current Income Taxes |  |  |
Federal | $ | — |  | $ | — |  | $ | (9.1 | )
State | (4.5 | ) | 4.3 |  | 0.5 |
Total Provision (Benefit) for Current Income Taxes | (4.5 | ) | 4.3 |  | (8.6 | )
Provision for Deferred Income Taxes, net |  |  |
Federal | 160.0 |  | 154.4 |  | 147.3 |
State | 18.2 |  | (26.4 | ) | (1.5 | )
Total Provision for Deferred Income Taxes, net | 178.2 |  | 128.0 |  | 145.8 |
Deferred Federal Investment Tax Credits, net | (0.9 | ) | (2.0 | ) | (2.1 | )
Total Income Tax Expense | $ | 172.8 |  | $ | 130.3 |  | $ | 135.1 |

The Company file s consolidated income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. With few exceptions, the Company is no longer subject to U.S. Federal tax examinations by tax authorities for years prior to 2011 or state and local tax examinations by tax authorities for years prior to 2010. Income taxes are generally allocated to each company in the affiliated group based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and are being amortized to income over the life of the related property. OG&E earns both Federal and Oklahoma state tax credits associated with production from its wind farms. In addition, OG&E and Enable earn Oklahoma state tax credits associated with their investments in electric generating and natural gas processing facilities which further reduce the Company's effective tax rate.
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The following schedule reconciles the statutory tax rates to the effective income tax rate:

Year ended December 31 | 2014 | 2013 | 2012
Statutory Federal tax rate | 35.0 | % | 35.0 | % | 35.0 | %
Amortization of net unfunded deferred taxes | 0.6 |  | 0.6 |  | 0.8 |
State income taxes, net of Federal income tax benefit | 1.2 |  | 0.4 |  | (0.1 | )
Federal investment tax credits, net | (0.2 | ) | (0.4 | ) | (0.4 | )
401(k) dividends | (0.5 | ) | (0.5 | ) | (0.5 | )
Income attributable to noncontrolling interest | — |  | (0.3 | ) | (1.6 | )
Federal renewable energy credit (A) | (6.7 | ) | (7.2 | ) | (7.2 | )
Uncertain tax positions | 0.5 |  | 1.5 |  | — |
Remeasurement of state deferred tax liabilities | 0.4 |  | (4.1 | ) | — |
Other | 0.1 |  | (0.1 | ) | — |
Effective income tax rate | 30.4 | % | 24.9 | % | 26.0 | %

(A) | Represents credits associated with the production from OG&E's wind farms.

The deferred tax provisions are recognized as costs in the ratemaking process by the commissions having jurisdiction over the rates charged by OG&E. The components of Deferred Income Taxes at December 31, 2014 and 2013, respectively, were as follows:

December 31 (In millions) | 2014 | 2013
Current Deferred Income Tax Assets |  |
Net operating losses | $ | 158.4 |  | $ | 180.1 |
Accrued liabilities | 15.6 |  | 22.3 |
Federal tax credits | 12.4 |  | 8.0 |
Accrued vacation | 4.4 |  | 4.7 |
Uncollectible accounts | 0.6 |  | 0.7 |
Total Current Deferred Income Tax Assets | $ | 191.4 |  | $ | 215.8 |
Non-Current Deferred Income Tax Liabilities |  |
Accelerated depreciation and other property related differences | $ | 1,936.8 |  | $ | 1,753.3 |
Investment in Enable Midstream Partners | 641.8 |  | 630.5 |
Company pension plan | 34.6 |  | 55.1 |
Income taxes refundable to customers, net | 21.7 |  | 21.9 |
Regulatory asset | 24.7 |  | 26.1 |
Bond redemption-unamortized costs | 5.3 |  | 3.6 |
Derivative instruments | 1.8 |  | 1.6 |
Total Non-Current Deferred Income Tax Liabilities | 2,666.7 |  | 2,492.1 |
Non-Current Deferred Income Tax Assets |  |
Federal tax credits | (139.0 | ) | (105.2 | )
State tax credits | (98.6 | ) | (92.6 | )
Postretirement medical and life insurance benefits | (56.4 | ) | (62.8 | )
Regulatory liabilities | (58.0 | ) | (61.3 | )
Asset retirement obligations | (21.4 | ) | (20.8 | )
Net operating losses | (19.8 | ) | (18.8 | )
Other | (4.8 | ) | (4.6 | )
Deferred Federal investment tax credits | (0.4 | ) | (0.7 | )
Total Non-Current Deferred Income Tax Assets | (398.4 | ) | (366.8 | )
Non-Current Deferred Income Tax Liabilities, net | $ | 2,268.3 |  | $ | 2,125.3 |

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As of December 31, 2014, the Company has classified $10.5 million of unrecognized tax benefits as a reduction of deferred tax assets recorded. Management is currently unaware of any issues under review that could result in significant additional payments, accruals, or other material deviation from this amount.
Following is a reconciliation of the Company’s total gross unrecognized tax benefits as of the years ended December 31, 2014, 2013, and 2012.

(Millions) | 2014 | 2013 | 2012
Balance at January 1 | $ | 7.8 |  | $ | — |  | $ | — |
Tax positions related to current year: |  |  |
Additions | 2.7 |  | 2.7 |  | — |
Tax positions related to prior years: |  |  |
Additions | — |  | 5.1 |  | — |
Balance at December 31 | $ | 10.5 |  | $ | 7.8 |  | $ | — |

Where applicable, the Company classifies income tax-related interest and penalties as interest expense and other operation and maintenance expense, respectively. During the year ended December 31, 2014, there were no income tax-related interest or penalties recorded with regard to uncertain tax positions. The total amount of unrecognized tax benefits that would impact the effective tax rate, if recognized, was $10.5 million as of December 31, 2014.
As previously reported, in January 2013, OG&E determined that a portion of certain Oklahoma investment tax credits previously recognized but not yet utilized may not be available for utilization in future years. During 2014, OG&E recorded an additional reserve for this item of $4.2 million ($2.7 million after the federal tax benefit) related to the same Oklahoma investment tax credits generated in the current year but not yet utilized due to management's determination that it is more likely than not that it will be unable to utilize these credits.
Other
The Company sustained Federal and state tax operating losses through 2013 caused primarily by bonus depreciation and other book verses tax temporary differences. As a result, the Company had accrued Federal and state income tax benefits carrying into 2014. As the Company can no longer carry these losses back to prior periods, these losses are being carried forward for utilization in future years. In addition to the operating losses, the Company was unable to utilize the various tax credits that were generating during these years. These tax losses and credits are being carried as deferred tax assets and will be utilized in future periods. Under current law, the Company anticipates future taxable income will be sufficient to utilize all of the losses and credits before they begin to expire, accordingly no valuation allowance is considered necessary. The following table summarizes these carry forwards:

(In millions) | Carry Forward Amount | Deferred Tax Asset | Earliest Expiration Date
Net operating losses |  |  |
State operating loss | $ | 857.0 |  | $ | 31.6 |  | 2030
Federal operating loss | 418.6 |  | 146.6 |  | 2030
Federal tax credits | 151.5 |  | 151.4 |  | 2029
State tax credits |  |  |
Oklahoma investment tax credits | 115.3 |  | 75.1 |  | N/A
Oklahoma capital investment board credits | 7.3 |  | 7.3 |  | N/A
Oklahoma zero emission tax credits | 24.3 |  | 16.2 |  | 2020

Acquisition of the equity interest in Enable on May 1, 2013, increased the Company's utilization of state net operating loss carryforwards. Under current tax law, the Company projects full utilization of all Federal operating losses in 2015 as well as partial utilization of State operating loss carryforwards. Accordingly, a current deferred tax asset of $158.4 million has been reflected on the balance sheet.
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Prior to 2014, the Company had a Federal tax operating loss primarily caused by the accelerated tax "bonus" depreciation provision contained within the Tax Relief, Unemployment Insurance Reauthorization and Job Creation Act of 2010 which allowed the Company to record a current income tax deduction for 100 percent of the cost of certain property placed into service in 2011 and 50 percent for certain property placed into service in 2012. During 2013, the Company began to utilize these net operating losses.
On December 19, 2014, the Tax Increase Prevention Act of 2014 was signed into law. Among other things, the law included an extension of bonus depreciation for one year for property generally placed in service before January 1, 2015. The impact of the new law was reflected in the Company's 2014 Consolidated Financial Statements as an increase in Deferred Tax Liabilities with a corresponding increase in Deferred Tax Assets related to the net operating loss. With this extension of bonus depreciation the Company's utilization of net operating losses will continue into 2015.
The Company has generated excess tax benefits of $31.6 million related to its equity based compensation plan which have not been recognized during the time it has been in a net operating loss position. This balance is available to offset future taxable income in addition to the net operating loss balances presented above. The tax benefit and the credit to additional paid-in capital related to these payments will be recorded at a future date when the deduction reduces current taxes payable.

9. | Common Equity

Automatic Dividend Reinvestment and Stock Purchase Plan
The Company issued 366,000 shares of common stock under its Automatic Dividend Reinvestment and Stock Purchase Plan in 2014 and received proceeds of $13.2 million. The Company may, from time to time, issue additional shares under its Automatic Dividend Reinvestment and Stock Purchase Plan to fund capital requirements or working capital needs. At December 31, 2014, there were 4,991,812 shares of unissued common stock reserved for issuance under the Company's Automatic Dividend Reinvestment and Stock Purchase Plan.
Earnings Per Share
Basic earnings per share is calculated by dividing net income attributable to OGE Energy by the weighted average number of the Company's common shares outstanding during the period. In the calculation of diluted earnings per share, weighted average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for the Company consist of performance units. Basic and diluted earnings per share for the Company were calculated as follows:

(In millions) | 2014 | 2013 | 2012
Net Income Attributable to OGE Energy | $ | 395.8 |  | $ | 387.6 |  | $ | 355.0 |
Average Common Shares Outstanding |  |  |
Basic average common shares outstanding | 199.2 |  | 198.2 |  | 197.1 |
Effect of dilutive securities: |  |  |
Contingently issuable shares (performance and restricted stock units) | 0.7 |  | 1.2 |  | 1.0 |
Diluted average common shares outstanding | 199.9 |  | 199.4 |  | 198.1 |
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 1.99 |  | $ | 1.96 |  | $ | 1.80 |
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders | $ | 1.98 |  | $ | 1.94 |  | $ | 1.79 |

Dividend Restrictions
The Company’s Certificate of Incorporation place restrictions on the amount of common stock dividends it can pay when preferred stock is outstanding. As there is no preferred stock outstanding, that restriction did not place any effective limit on the Company’s ability to pay dividends to its shareholders. Pursuant to the leverage restriction in the Company’s revolving credit agreement, the Company must maintain a percentage of debt to total capitalization at a level that does not exceed 65 percent. The payment of cash dividends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $452.6 million of the Company’s retained earnings from being paid out in dividends. Accordingly, approximately $1.7 billion of the Company’s retained earnings as of December 31, 2014 are unrestricted for the payment of dividends.
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The Company depends on receipts from its equity investment in Enable and dividends from OG&E to pay dividends to its shareholders. Enable’s partnership agreement requires that it distribute all “available cash”, as defined as cash on hand at the end of a quarter after the payment of expenses and the establishment of cash reserves, and cash on hand resulting from working capital borrowings made after the end of the quarter. Pursuant to the Federal Power Act, OG&E is restricted from paying dividends from its capital accounts. Dividends are paid from retained earnings. Pursuant to the leverage restriction in OG&E’s revolving credit agreement, OG&E must also maintain a percentage of debt to total capitalization at a level that does not exceed 65 percent. The payment of cash dividends indirectly results in an increase in the percentage of debt to total capitalization, which results in the restriction of approximately $412.2 million of OG&E’s retained earnings from being paid out in dividends. Accordingly, approximately $1.6 billion of OG&E’s retained earnings as of December 31, 2014 are unrestricted for the payment of dividends.

10. | Long-Term Debt

A summary of the Company's long-term debt is included in the Consolidated Statements of Capitalization. At December 31, 2014, the Company was in compliance with all of its debt agreements.
OG&E Industrial Authority Bonds
OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The bonds, which can be tendered at the option of the holder during the next 12 months, are as follows:

SERIES | DATE DUE | AMOUNT
|  |  |  | (In millions)
0.07% | - | 0.20% | Garfield Industrial Authority, January 1, 2025 | $ | 47.0 |
0.07% | - | 0.18% | Muskogee Industrial Authority, January 1, 2025 | 32.4 |
0.04% | - | 0.15% | Muskogee Industrial Authority, June 1, 2027 | 56.0 |
Total (redeemable during next 12 months) | $ | 135.4 |

All of these bonds are subject to an optional tender at the request of the holders, at 100 percent of the principal amount, together with accrued and unpaid interest to the date of purchase. The bond holders, on any business day, can request repayment of the bond by delivering an irrevocable notice to the tender agent stating the principal amount of the bond, payment instructions for the purchase price and the business day the bond is to be purchased. The repayment option may only be exercised by the holder of a bond for the principal amount. When a tender notice has been received by the trustee, a third party remarketing agent for the bonds will attempt to remarket any bonds tendered for purchase. This process occurs once per week. Since the original issuance of these series of bonds in 1995 and 1997, the remarketing agent has successfully remarketed all tendered bonds. If the remarketing agent is unable to remarket any such bonds, OG&E is obligated to repurchase such unremarketed bonds. As OG&E has both the intent and ability to refinance the bonds on a long-term basis and such ability is supported by an ability to consummate the refinancing, the bonds are classified as long-term debt in the Company's Consolidated Financial Statements. OG&E believes that it has sufficient liquidity to meet these obligations.
Issuance of Long-Term Debt
On March 25, 2014, OG&E completed the issuance of $250 million of 4.55 percent senior notes due March 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
On November 19, 2014, the Company completed the issuance of $100 million of in aggregate principal of its Floating Rate Senior Notes, Series due November 24, 2017. The proceeds from the issuance were used to refinance its $100 million of 5.00 percent Senior Notes due November 15, 2014.
On December 11, 2014, OG&E completed the issuance of $250 million of 4.00 percent Senior Notes, Series due December 15, 2044. The proceeds from the issuance were added to OG&E's general funds and were used to repay short-term debt, fund capital expenditures and general corporate expenses, and utilized for working capital purposes.
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Redemption of Long-Term Debt
On August 1, 2014, OG&E redeemed all $140 million principal amount outstanding of its 6.50 percent senior notes due August 1, 2034 at 103.25 percent of their principal amount, plus accrued interest. The redemption premium of $4.6 million was deferred and will be amortized through March 2044 to match the expected regulatory treatment.
Long-Term Debt Maturities
Maturities of the Company's long-term debt during the next five years consist of $0.2 million, $110.2 million, $225.1 million, $250.1 million and $250.1 million in years 2015, 2016, 2017, 2018 and 2019, respectively.
The Company has previously incurred costs related to debt refinancings. Unamortized loss on reacquired debt is classified as a Non-Current Regulatory Asset, u namortized debt expense is classified as Deferred Charges and Other Assets and the unamortized premium and discount on long-term debt is classified as Long-Term Debt, respectively, in the Consolidated Balance Sheets and are being amortized over the life of the respective debt.

11. | Short-Term Debt and Credit Facilities

The Company borrows on a short-term basis, as necessary, by the issuance of commercial paper and by borrowings under its revolving credit agreements. The short-term debt balance was $98.0 million and $439.6 million at December 31, 2014 and 2013, respectively, at a weighted-average interest rate of 0.41 percent and 0.43 percent, respectively. The following table provides information regarding the Company's revolving credit agreements and available cash at December 31, 2014.

| Aggregate | Amount | Weighted-Average |  |
Entity | Commitment | Outstanding (A) | Interest Rate | Maturity
| (In millions) |  |  |  |
OGE Energy (B) | $ | 750.0 |  | $ | 98.0 |  | 0.41 | % | (D) | December 13, 2018 | (E)
OG&E (C) | 400.0 |  | 2.0 |  | 0.95 | % | (D) | December 13, 2018 | (E)
Total | $ | 1,150.0 |  | $ | 100.0 |  | 0.42 | % |  |  |

(A) | Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at December 31, 2014.

(B) | This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(C) | This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(D) | Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.

(E) | In December 2011, the Company and OG&E entered into unsecured five-year revolving credit agreement s to total in the aggregate $1,150.0 million ($750.0 million for the Company and $400.0 million for OG&E). Each of the credit facilit ies contained an option, which could be exercised up to two times, to extend the term for an additional year. In the third quarter of 2013, the Company and OG&E utilized one of these one-year extensions, and received consent from all of the lenders, to extend the maturity of their credit agreement s from December 13, 2016 to December 13, 2017. In the second quarter of 2014, the Company and OG&E utilized their second extension to extend the maturity of their respective credit facility from December 13, 2017 to December 13, 2018. As of December 31, 2014, commitments of a single existing lender with respect to approximately $16.3 million and $8.7 million of the Company's and OG&E's credit facilities, respectively, however, were not extended and, unless the non-extending lender is replaced in accordance with the terms of the credit facility, such commitments will expire December 13, 2017.

The Company's ability to access the commercial paper market could be adversely impacted by a credit ratings downgrade or major market disruptions. Pricing grids associated with the Company's credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of the Company's short-term borrowings, but a reduction in the Company's credit rating s would not result in any defaults or accelerations. Any future downgrade could also lead to higher long-term borrowing costs and, if below investment grade, would require the Company to post collateral or letters of credit.
OG&E must obtain regulatory approval from the FERC in order to borrow on a short-term basis. OG&E has the necessary regulatory approvals to incur up to $800 million in short-term borrowings at any one time for a two-year period beginning January 1, 2015 and ending December 31, 2016.
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12. | Retirement Plans and Postretirement Benefit Plans

Pension Plan and Restoration of Retirement Income Plan
It is the Company's policy to fund the Pension Plan on a current basis based on the net periodic pension expense as determined by the Company's actuarial consultants. During 2013, OGE Energy made contributions to its Pension Plan of $35 million to help ensure that the Pension Plan maintains an adequate funded status. Such contributions are intended to provide not only for benefits attributed to service to date, but also for those expected to be earned in the future. During 2014, OGE Energy did not make any contributions to its Pension Plan. OGE Energy has not yet determined whether it will need to make any contributions to the Pension Plan in 2015. Any contribution to the Pension Plan during 2015 would be a discretionary contribution, anticipated to be in the form of cash, and is not required to satisfy the minimum regulatory funding requirement specified by the Employee Retirement Income Security Act of 1974, as amended. OGE Energy could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future.
As discussed in Note 3, CenterPoint, OGE Energy and Enable agreed to continue the secondment to Enable of 192 OGE Energy employees that participate in OGE Energy's defined benefit and retirement plans beyond December 31, 2014, while 277 OGE Energy employees that participated in the Retirement Plan and 59 employees entitled to life insurance benefits only were terminated. As a result, the Company incurred a curtailment, that reduced the pension expense charge to Enable by $0.2 million for the year ended December 31, 2014.
In accordance with ASC Topic 715, "Compensation - Retirement Benefits," a one-time settlement charge is required to be recorded by an organization when lump sum payments or other settlements that relieve the organization from the responsibility for the pension benefit obligation during a plan year exceed the service cost and interest cost components of the organization’s net periodic pension cost. During 2013, the Company experienced an increase in both the number of employees electing to retire and the amount of lump sum payments to be paid to such employees upon retirement. As a result, and based in part on the Company’s historical experience regarding eligible employees who elect to retire in the last quarter of a particular year, the Company recorded pension settlement charges of $22.4 million in the fourth quarter of 2013, of which $17.0 million related to OG&E’s Oklahoma jurisdiction and has been included in the pension tracker. The pension settlement charge did not require a cash outlay by the Company and did not increase the Company’s total pension expense over time, as the charges were an acceleration of costs that otherwise would be recognized as pension expense in future periods.
The Company provides a Restoration of Retirement Income Plan to those participants in the Company's Pension Plan whose benefits are subject to certain limitations of the Code. Participants in the Restoration of Retirement Income Plan receive the same benefits that they would have received under the Company's Pension Plan in the absence of limitations imposed by the Federal tax laws. The Restoration of Retirement Income Plan is intended to be an unfunded plan.
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Obligations and Funded Status
The following table presents the status of the Company's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans for 2014 and 2013. These amounts have been recorded in Accrued Benefit Obligations with the offset in Accumulated Other Comprehensive Loss (except OG&E's portion which is recorded as a regulatory asset as discussed in Note 1) in the Company's Consolidated Balance Sheet. The amounts in Accumulated Other Comprehensive Loss and those recorded as a regulatory asset represent a net periodic benefit cost to be recognized in the Consolidated Statements of Income in future periods. The benefit obligation for the Company's Pension Plan and the Restoration of Retirement Income Plan represents the projected benefit obligation, while the benefit obligation for the postretirement benefit plans represents the accumulated postretirement benefit obligation. The accumulated postretirement benefit obligation for the Company's Pension Plan and Restoration of Retirement Income Plan differs from the projected benefit obligation in that the former includes no assumption about future compensation levels. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2014 was $688.4 million and $18.7 million, respectively. The accumulated postretirement benefit obligation for the Pension Plan and the Restoration of Retirement Income Plan at December 31, 2013 was $623.4 million and $12.9 million, respectively. The details of the funded status of the Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans and the amounts included in the Consolidated Balance Sheets are as follows:

| Pension Plan | Restoration of Retirement Income Plan | Postretirement Benefit Plans
December 31 (In millions) | 2014 | 2013 | 2014 | 2013 | 2014 | 2013
Change in Benefit Obligation |  |  |  |  |  |
Beginning obligations | $ | 658.1 |  | $ | 747.1 |  | $ | 14.0 |  | $ | 14.5 |  | $ | 258.2 |  | $ | 301.0 |
Service cost | 15.3 |  | 19.0 |  | 1.1 |  | 1.2 |  | 3.1 |  | 4.3 |
Interest cost | 28.1 |  | 26.7 |  | 0.6 |  | 0.5 |  | 11.4 |  | 10.3 |
Plan curtailments | (0.7 | ) | — |  | — |  | — |  | (0.6 | ) | — |
Plan settlements | — |  | (67.5 | ) | — |  | — |  | — |  | — |
Participants' contributions | — |  | — |  | — |  | — |  | 3.4 |  | 3.4 |
Actuarial (gains) losses | 79.3 |  | (53.0 | ) | 4.1 |  | (2.0 | ) | 19.5 |  | (46.7 | )
Benefits paid | (55.1 | ) | (14.2 | ) | (0.1 | ) | (0.2 | ) | (14.1 | ) | (14.1 | )
Ending obligations | $ | 725.0 |  | $ | 658.1 |  | $ | 19.7 |  | $ | 14.0 |  | $ | 280.9 |  | $ | 258.2 |
Change in Plans' Assets |  |  |  |  |  |
Beginning fair value | $ | 654.9 |  | $ | 626.0 |  | $ | — |  | $ | — |  | $ | 61.4 |  | $ | 59.6 |
Actual return on plans' assets | 80.0 |  | 75.6 |  | — |  | — |  | 1.8 |  | 3.7 |
Employer contributions | — |  | 35.0 |  | 0.1 |  | 0.2 |  | 7.1 |  | 8.8 |
Plan settlements | — |  | (67.5 | ) | — |  | — |  | — |  | — |
Participants' contributions | — |  | — |  | — |  | — |  | 3.4 |  | 3.4 |
Benefits paid | (55.1 | ) | (14.2 | ) | (0.1 | ) | (0.2 | ) | (14.1 | ) | (14.1 | )
Ending fair value | $ | 679.8 |  | $ | 654.9 |  | $ | — |  | $ | — |  | $ | 59.6 |  | $ | 61.4 |
Funded status at end of year | $ | (45.2 | ) | $ | (3.2 | ) | $ | (19.7 | ) | $ | (14.0 | ) | $ | (221.3 | ) | $ | (196.8 | )

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Net Periodic Benefit Cost

| Pension Plan | Restoration of Retirement Income Plan | Postretirement Benefit Plans
Year ended December 31 (In millions) | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012
Service cost | $ | 15.3 |  | $ | 19.0 |  | $ | 17.9 |  | $ | 1.1 |  | $ | 1.2 |  | $ | 1.0 |  | $ | 3.1 |  | $ | 4.3 |  | $ | 4.1 |
Interest cost | 28.1 |  | 26.7 |  | 30.1 |  | 0.6 |  | 0.5 |  | 0.6 |  | 11.4 |  | 10.3 |  | 11.9 |
Expected return on plan assets | (45.3 | ) | (48.4 | ) | (46.0 | ) | — |  | — |  | — |  | (2.4 | ) | (2.5 | ) | (3.0 | )
Amortization of transition obligation | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 2.7 |
Amortization of net loss | 14.3 |  | 26.5 |  | 23.8 |  | 0.2 |  | 0.4 |  | 0.4 |  | 12.3 |  | 21.5 |  | 20.6 |
Amortization of unrecognized prior service cost (A) | 1.7 |  | 1.8 |  | 2.2 |  | 0.2 |  | 0.3 |  | 0.7 |  | (16.5 | ) | (16.5 | ) | (16.5 | )
Curtailment | (0.2 | ) | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Settlement | — |  | 22.4 |  | — |  | — |  | — |  | 0.9 |  | — |  | — |  | — |
Total net periodic benefit cost | 13.9 |  | 48.0 |  | 28.0 |  | 2.1 |  | 2.4 |  | 3.6 |  | 7.9 |  | 17.1 |  | 19.8 |
Less: Amount paid by unconsolidated affiliates | 3.2 |  | 5.9 |  | — |  | 0.1 |  | 0.1 |  | — |  | 1.3 |  | 1.5 |  | — |
Net periodic benefit cost (B) | $ | 10.7 |  | $ | 42.1 |  | $ | 28.0 |  | $ | 2.0 |  | $ | 2.3 |  | $ | 3.6 |  | $ | 6.6 |  | $ | 15.6 |  | $ | 19.8 |

(A) | Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment.

(B) | In addition to the $19.3 million, $60.0 million and $51.4 million of net periodic benefit cost recognized in 2014, 2013 and 2012, respectively, the Company recognized the following:

• | an increase in pension expense in 2014, 2013 and 2012 of $11.2 million, $5.8 million and $8.3 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory asset or liability (see Note 1);

• | an increase in postretirement medical expense in 2014, 2013 and 2012 of $5.2 million, $0.6 million and $0.8 million, respectively, to maintain the allowable amount to be recovered for postretirement medical expense in the Oklahoma jurisdiction which are included in the Pension tracker regulatory asset or liability (see Note 1); and

• | a deferral of pension expense in 2013 of $17.0 million related to the pension settlement charge of $22.4 million, in accordance with the Oklahoma pension tracker.

(In millions) | 2014 | 2013 | 2012
Capitalized portion of net periodic pension cost | $ | 3.4 |  | $ | 6.4 |  | $ | 7.5 |
Capitalized portion of net periodic postretirement benefit cost | 2.0 |  | 4.5 |  | 5.6 |

Rate Assumptions

| Pension Plan and Restoration of Retirement Income Plan | Postretirement Benefit Plans
Year ended December 31 | 2014 | 2013 | 2012 | 2014 | 2013 | 2012
Discount rate | 3.80 | % | 4.60 | % | 3.70 | % | 3.80 | % | 4.60 | % | 3.60 | %
Rate of return on plans' assets | 7.50 | % | 8.00 | % | 8.00 | % | 4.00 | % | 4.00 | % | 4.00 | %
Compensation increases | 4.20 | % | 4.20 | % | 4.20 | % | N/A |  | N/A |  | N/A |
Assumed health care cost trend: |  |  |  |  |  |  |  |  |  |  |  |
Initial trend | N/A |  | N/A |  | N/A |  | 7.85 | % | 8.35 | % | 8.55 | %
Ultimate trend rate | N/A |  | N/A |  | N/A |  | 4.48 | % | 4.48 | % | 4.48 | %
Ultimate trend year | N/A |  | N/A |  | N/A |  | 2028 |  | 2028 |  | 2028 |

N/A - not applicable
The overall expected rate of return on plan assets assumption was 7.50 percent and 8.00 percent in 2014 and 2013, respectively, in determining net periodic benefit cost due to recent returns on the Company's long-term investment portfolio. The rate of return on plan assets assumption is the average long-term rate of earnings expected on the funds currently invested and to
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be invested for the purpose of providing benefits specified by the Pension Plan or postretirement benefit plans. This assumption is reexamined at least annually and updated as necessary. The rate of return on plan assets assumption reflects a combination of historical return analysis, forward-looking return expectations and the plans' current and expected asset allocation.
The assumed health care cost trend rates have a significant effect on the amounts reported for postretirement medical benefit plans. Future health care cost trend rates are assumed to be 7.85 percent in 2015 with the rates trending downward to 4.48 percent by 2028. A one-percentage point change in the assumed health care cost trend rate would have the following effects:

ONE-PERCENTAGE POINT INCREASE
Year ended December 31 (In millions) | 2014 | 2013 | 2012
Effect on aggregate of the service and interest cost components | $ | — |  | $ | — |  | $ | — |
Effect on accumulated postretirement benefit obligations | 0.1 |  | 0.1 |  | 0.1 |

ONE-PERCENTAGE POINT DECREASE
Year ended December 31 (In millions) | 2014 | 2013 | 2012
Effect on aggregate of the service and interest cost components | $ | 0.1 |  | $ | 0.1 |  | $ | 0.1 |
Effect on accumulated postretirement benefit obligations | 0.7 |  | 0.6 |  | 0.9 |

Plan Investments, Policies and Strategies
The Pension Plan assets are held in a trust which follows an investment policy and strategy designed to reduce the funded status volatility of the Plan by utilizing liability driven investing. The purpose of liability driven investing is to structure the asset portfolio to more closely resemble the pension liability and thereby more effectively hedge against changes in the liability. The investment policy follows a glide path approach that shifts a higher portfolio weighting to fixed income as the Plan's funded status increases. The table below sets forth the targeted fixed income and equity allocations at different funded status levels.

Projected Benefit Obligation Funded Status Thresholds | <90% | 95% | 100% | 105% | 110% | 115% | 120%
Fixed income | 50% | 58% | 65% | 73% | 80% | 85% | 90%
Equity | 50% | 42% | 35% | 27% | 20% | 15% | 10%
Total | 100% | 100% | 100% | 100% | 100% | 100% | 100%

Within the portfolio's overall allocation to equities, the funds are allocated according to the guidelines in the table below.

Asset Class | Target Allocation | Minimum | Maximum
Domestic All-Cap/Large Cap Equity | 50% | 50% | 60%
Domestic Mid-Cap Equity | 15% | 5% | 25%
Domestic Small-Cap Equity | 15% | 5% | 25%
International Equity | 20% | 10% | 30%

The Company has retained an investment consultant responsible for the general investment oversight, analysis, monitoring investment guideline compliance and providing quarterly reports to certain of the Company's members and the Company's Investment Committee. The various investment managers used by the trust operate within the general operating objectives as established in the investment policy and within the specific guidelines established for each investment manager's respective portfolio.
The portfolio is rebalanced at least on an annual basis to bring the asset allocations of various managers in line with the target asset allocation listed above. More frequent rebalancing may occur if there are dramatic price movements in the financial markets which may cause the trust's exposure to any asset class to exceed or fall below the established allowable guidelines.
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To evaluate the progress of the portfolio, investment performance is reviewed quarterly. It is, however, expected that performance goals will be met over a full market cycle, normally defined as a three to five year period. Analysis of performance is within the context of the prevailing investment environment and the advisors' investment style. The goal of the trust is to provide a rate of return consistently from three percent to five percent over the rate of inflation (as measured by the national Consumer Price Index) on a fee adjusted basis over a typical market cycle of no less than three years and no more than five years. Each investment manager is expected to outperform its respective benchmark. Below is a list of each asset class utilized with appropriate comparative benchmark(s) each manager is evaluated against:

Asset Class | Comparative Benchmark(s)
Core Fixed Income | Barclays Capital Aggregate Index
Interest Rate Sensitive Fixed Income | Barclays Capital Aggregate Index
Long Duration Fixed Income | Barclays Long Government/Credit
Equity Index | Standard & Poor's 500 Index
All-Cap Equity | Russell 3000 Index
| Russell 3000 Value Index
Mid-Cap Equity | Russell Midcap Index
| Russell Midcap Value Index
Small-Cap Equity | Russell 2000 Index
| Russell 2000 Value Index
International Equity | Morgan Stanley Capital Investment ACWI ex-US

The fixed income managers are expected to use discretion over the asset mix of the trust assets in its efforts to maximize risk-adjusted performance. Exposure to any single issuer, other than the U.S. government, its agencies, or its instrumentalities (which have no limits) is limited to five percent of the fixed income portfolio as measured by market value. At least 75 percent of the invested assets must possess an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings. The portfolio may invest up to 10 percent of the portfolio's market value in convertible bonds as long as the securities purchased meet the quality guidelines. A portfolio may invest up to 25 percent of the portfolio's market value in private placement, including 144A securities with or without registration rights and allow for futures to be traded in the portfolio. The purchase of any of the Company's equity, debt or other securities is prohibited.
The domestic value equity managers focus on stocks that the manager believes are undervalued in price and earn an average or less than average return on assets, and often pays out higher than average dividend payments. The domestic growth equity manager will invest primarily in growth companies which consistently experience above average growth in earnings and sales, earn a high return on assets, and reinvest cash flow into existing business. The domestic mid-cap equity portfolio manager focuses on companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell Midcap Index, small dividend yield, return on equity at or near the Russell Midcap Index and an earnings per share growth rate at or near the Russell Midcap Index. The domestic small-cap equity manager will purchase shares of companies with market capitalizations lower than the average company traded on the public exchanges with the following characteristics: price/earnings ratio at or near the Russell 2000, small dividend yield, return on equity at or near the Russell 2000 and an earnings per share growth rate at or near the Russell 2000. The international global equity manager invests primarily in non-dollar denominated equity securities. Investing internationally diversifies the overall trust across the global equity markets. The manager is required to operate under certain restrictions including: regional constraints, diversification requirements and percentage of U.S. securities. The Morgan Stanley Capital International All Country World ex-US Index is the benchmark for comparative performance purposes. The Morgan Stanley Capital International All Country World ex-US Index is a market value weighted index designed to measure the combined equity market performance of developed and emerging markets countries, excluding the United States. All of the equities which are purchased for the international portfolio are thoroughly researched. Only companies with a market capitalization in excess of $100 million are allowable. No more than five percent of the portfolio can be invested in any one stock at the time of purchase. All securities are freely traded on a recognized stock exchange and there are no over-the-counter derivatives. The following investment categories are excluded: options (other than traded currency options), commodities, futures (other than currency futures or currency hedging), short sales/margin purchases, private placements, unlisted securities and real estate (but not real estate shares).
For all domestic equity investment managers, no more than eight percent (five percent for mid-cap and small-cap equity managers) can be invested in any one stock at the time of purchase and no more than 16 percent (10 percent for mid-cap and small-cap equity managers) after accounting for price appreciation. Options or financial futures may not be purchased unless prior approval of the Company's Investment Committee is received. The purchase of securities on margin is prohibited as is securities lending. Private placement or venture capital may not be purchased. All interest and dividend payments must be swept on a daily
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basis into a short-term money market fund for re-deployment. The purchase of any of the Company's equity, debt or other securities is prohibited. The purchase of equity or debt issues of the portfolio manager's organization is also prohibited. The aggregate positions in any company may not exceed one percent of the fair market value of its outstanding stock.
Plan Investments
The following tables summarize the Pension Plan's investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 3 investments held by the Pension Plan at December 31, 2014 and 2013.

(In millions) | December 31, 2014 | Level 1 | Level 2
Common stocks |  |  |
U.S. common stocks | $ | 201.4 |  | $ | 201.4 |  | $ | — |
Foreign common stocks | 31.3 |  | 31.3 |  | — |
U.S. Government obligations |  |  |
U.S. treasury notes and bonds (A) | 203.2 |  | 203.2 |  | — |
Mortgage-backed securities | 20.6 |  | — |  | 20.6 |
Bonds, debentures and notes (B) |  |  |  |  |  |
Corporate fixed income and other securities | 167.1 |  | — |  | 167.1 |
Mortgage-backed securities | 19.3 |  | — |  | 19.3 |
Commingled fund (C) | 25.1 |  | — |  | 25.1 |
Common/collective trust (D) | 29.9 |  | — |  | 29.9 |
Foreign government bonds | 7.2 |  | — |  | 7.2 |
U.S. municipal bonds | 3.5 |  | — |  | 3.5 |
Interest-bearing cash | 0.2 |  | 0.2 |  | — |
Preferred stocks (foreign) | 1.2 |  | 1.2 |  | — |
Forward contracts |  |  |
Receivable (foreign currency) | 11.3 |  | — |  | 11.3 |
Payable (foreign currency) | (15.6 | ) | — |  | (15.6 | )
Total Plan investments | $ | 705.7 |  | $ | 437.3 |  | $ | 268.4 |
Receivable from broker for securities sold | 3.2 |  |  |  |  |
Interest and dividends receivable | 3.9 |  |  |  |  |
Payable to broker for securities purchased | (33.0 | ) |  |  |  |
Total Plan assets | $ | 679.8 |  |  |  |  |

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(In millions) | December 31, 2013 | Level 1 | Level 2
Common stocks |  |  |
U.S. common stocks | $ | 236.8 |  | $ | 236.8 |  | $ | — |
Foreign common stocks | 39.3 |  | 39.3 |  | — |
U.S. Government obligations |  |  |  |  |  |
U.S. treasury notes and bonds (A) | 159.8 |  | 159.8 |  | — |
Mortgage-backed securities | 50.3 |  | — |  | 50.3 |
Bonds, debentures and notes (B) |  |  |  |  |  |
Corporate fixed income and other securities | 110.6 |  | — |  | 110.6 |
Mortgage-backed securities | 22.3 |  | — |  | 22.3 |
Commingled fund (C) | 29.2 |  | — |  | 29.2 |
Common/collective trust (D) | 26.0 |  | — |  | 26.0 |
Foreign government bonds | 4.0 |  | — |  | 4.0 |
U.S. municipal bonds | 2.0 |  | — |  | 2.0 |
Interest-bearing cash | 0.1 |  | 0.1 |  | — |
Forward contracts |  |  |
Receivable (foreign currency) | 1.1 |  | — |  | 1.1 |
Payable (foreign currency) | (1.1 | ) | — |  | (1.1 | )
Total Plan investments | $ | 680.4 |  | $ | 436.0 |  | $ | 244.4 |
Receivable from broker for securities sold | 11.5 |  |  |  |  |
Interest and dividends receivable | 3.2 |  |  |  |  |
Payable to broker for securities purchased | (40.2 | ) |  |  |  |
Total Plan assets | $ | 654.9 |  |  |  |  |

(A) | This category represents U.S. treasury notes and bonds with a Moody's Investors Services rating of Aaa and Government Agency Bonds with a Moody's Investors Services rating of A1 or higher.

(B) | This category primarily represents U.S. corporate bonds with an investment grade rating at or above Baa3 or BBB- by Moody's Investors Services, Standard & Poor's Ratings Services or Fitch Ratings.

(C) | This category represents units of participation in a commingled fund that primarily invested in stocks of international companies and emerging markets.

(D) | This category represents units of participation in an investment pool which primarily invests in foreign or domestic bonds, debentures, mortgages, equipment or other trust certificates, notes, obligations issued or guaranteed by the U.S. Government or its agencies, bank certificates of deposit, bankers' acceptances and repurchase agreements, high grade commercial paper and other instruments with money market characteristics with a fixed or variable interest rate. There are no restrictions on redemptions in the common/collective trust.

The three levels defined in the fair value hierarchy and examples of each are as follows:
Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible by the Pension Plan at the measurement date. Instruments classified as Level 1 include investments in common and preferred stocks, U.S. treasury notes and bonds, mutual funds and interest-bearing cash.
Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Instruments classified as Level 2 include corporate fixed income and other securities, mortgage-backed securities, other U.S. Government obligations, commingled fund, a common/collective trust, U.S. municipal bonds, foreign government bonds, a repurchase agreement, money market fund and forward contracts.
Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the Plan's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk).
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Postretirement Benefit Plans
In addition to providing pension benefits, the Company provides certain medical and life insurance benefits for eligible retired members. Regular, full-time, active employees hired prior to February 1, 2000 whose age and years of credited service total or exceed 80 or have attained at least age 55 with 10 or more years of service at the time of retirement are entitled to postretirement medical benefits while employees hired on or after February 1, 2000 are not entitled to postretirement medical benefits. Eligible retirees must contribute such amount as the Company specifies from time to time toward the cost of coverage for postretirement benefits. The benefits are subject to deductibles, co-payment provisions and other limitations. OG&E charges to expense the postretirement benefit costs and includes an annual amount as a component of the cost-of-service in future ratemaking proceedings.
The Company's contribution to the medical costs for pre-65 aged eligible retirees are fixed at the 2011 level and the Company covers future annual medical inflationary cost increases up to five percent. Increases in excess of five percent annually are covered by the pre-65 aged retiree in the form of premium increases. The Company provides Medicare-eligible retirees and their Medicare-eligible spouses an annual fixed contribution to a Company-sponsored health reimbursement arrangement. Medicare-eligible retirees are able to purchase individual insurance policies supplemental to Medicare through a third-party administrator and use their health reimbursement arrangement funds for reimbursement of medical premiums and other eligible medical expenses.
Plan Investments
The following tables summarize the postretirement benefit plans investments that are measured at fair value on a recurring basis at December 31, 2014 and 2013. There were no Level 2 investments held by the postretirement benefit plans at December 31, 2014 and 2013.

(In millions) | December 31, 2014 | Level 1 | Level 3
Group retiree medical insurance contract (A) | $ | 51.0 |  | $ | — |  | $ | 51.0 |
Mutual funds investment |  |  |
U.S. equity investments | 8.5 |  | 8.5 |  | — |
Money market funds investment | 0.1 |  | 0.1 |  | — |
Total Plan investments | $ | 59.6 |  | $ | 8.6 |  | $ | 51.0 |

(In millions) | December 31, 2013 | Level 1 | Level 3
Group retiree medical insurance contract (A) | $ | 53.1 |  | $ | — |  | $ | 53.1 |
Mutual funds investment |  |  |
U.S. equity investments | 7.9 |  | 7.9 |  | — |
Money market funds investment | 0.4 |  | 0.4 |  | — |
Total Plan investments | $ | 61.4 |  | $ | 8.3 |  | $ | 53.1 |

(A) | This category represents a group retiree medical insurance contract which invests in a pool of common stocks, bonds and money market accounts, of which a significant portion is comprised of mortgage-backed securities.

The postretirement benefit plans Level 3 investment includes an investment in a group retiree medical insurance contract. The unobservable input included in the valuation of the contract includes the approach for determining the allocation of the postretirement benefit plans pro-rata share of the total assets in the contract.
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The following table summarizes the postretirement benefit plans investments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3).

Year ended December 31 (In millions) | 2014
Group retiree medical insurance contract |
Beginning balance | $ | 53.1 |
Net unrealized gains related to instruments held at the reporting date | 1.5 |
Interest income | 1.0 |
Dividend income | 0.6 |
Realized losses | (0.9 | )
Claims paid | (4.3 | )
Ending balance | $ | 51.0 |

Medicare Prescription Drug, Improvement and Modernization Act of 2003
The Medicare Prescription Drug, Improvement and Modernization Act of 2003 expanded coverage for prescription drugs. The following table summarizes the gross benefit payments the Company expects to pay related to its postretirement benefit plans, including prescription drug benefits.

(In millions) | Gross Projected Postretirement Benefit Payments
2015 | $ | 15.3 |
2016 | 15.9 |
2017 | 16.3 |
2018 | 16.7 |
2019 | 17.0 |
After 2019 | 86.2 |

The following table summarizes the benefit payments the Company expects to pay related to its Pension Plan and Restoration of Retirement Income Plan. These expected benefits are based on the same assumptions used to measure the Company's benefit obligation at the end of the year and include benefits attributable to estimated future employee service.

(In millions) | Projected Benefit Payments
2015 | $ | 98.3 |
2016 | 80.6 |
2017 | 75.6 |
2018 | 70.4 |
2019 | 84.8 |
After 2019 | 247.8 |

Post-Employment Benefit Plan
Disabled employees receiving benefits from the Company's Group Long-Term Disability Plan are entitled to continue participating in the Company's Medical Plan along with their dependents. The post-employment benefit obligation represents the actuarial present value of estimated future medical benefits that are attributed to employee service rendered prior to the date as of which such information is presented. The obligation also includes future medical benefits expected to be paid to current employees participating in the Company's Group Long-Term Disability Plan and their dependents, as defined in the Company's Medical Plan.
The post-employment benefit obligation is determined by an actuary on a basis similar to the accumulated postretirement benefit obligation. The estimated future medical benefits are projected to grow with expected future medical cost trend rates and are discounted for interest at the discount rate and for the probability that the participant will discontinue receiving benefits from
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the Company's Group Long-Term Disability Plan due to death, recovery from disability, or eligibility for retiree medical benefits. The Company's post-employment benefit obligation was $1.2 million and $1.6 million at December 31, 2014 and 2013, respectively.
401(k) Plan
The Company provides a 401(k) Plan. Each regular full-time employee of the Company or a participating affiliate is eligible to participate in the 401(k) Plan immediately. All other employees of the Company or a participating affiliate are eligible to become participants in the 401(k) Plan after completing one year of service as defined in the 401(k) Plan. Participants may contribute each pay period any whole percentage between two percent and 19 percent of their compensation, as defined in the 401(k) Plan, for that pay period. Participants who have attained age 50 before the close of a year are allowed to make additional contributions referred to as "Catch-Up Contributions," subject to certain limitations of the Code. Participants may designate, at their discretion, all or any portion of their contributions as: (i) a before-tax contribution under Section 401(k) of the Code subject to the limitations thereof; or (ii) a contribution made on an after-tax basis. The 401(k) Plan also includes an eligible automatic contribution arrangement and provides for a qualified default investment alternative consistent with the U.S. Department of Labor regulations. Participants may elect, in accordance with the 401(k) Plan procedures, to have his or her future salary deferral rate to be automatically increased annually on a date and in an amount as specified by the participant in such election. For employees hired or rehired on or after December 1, 2009, the Company contributes to the 401(k) Plan, on behalf of each participant, 200 percent of the participant's contributions up to five percent of compensation.
No Company contributions are made with respect to a participant's Catch-Up Contributions, rollover contributions, or with respect to a participant's contributions based on overtime payments, pay-in-lieu of overtime for exempt personnel, special lump-sum recognition awards and lump-sum merit awards included in compensation for determining the amount of participant contributions. Once made, the Company's contribution may be directed to any available investment option in the 401(k) Plan. The Company match contributions vest over a three-year period. After two years of service, participants become 20 percent vested in their Company contribution account and become fully vested on completing three years of service. In addition, participants fully vest when they are eligible for normal or early retirement under the Pension Plan, in the event of their termination due to death or permanent disability or upon attainment of age 65 while employed by the Company or its affiliates. The Company contributed $15.2 million, $14.2 million and $13.4 million in 2014, 2013 and 2012, respectively, to the 401(k) Plan.
Deferred Compensation Plan
The Company provides a nonqualified deferred compensation plan which is intended to be an unfunded plan. The plan's primary purpose is to provide a tax-deferred capital accumulation vehicle for a select group of management, highly compensated employees and non-employee members of the Board of Directors of the Company and to supplement such employees' 401(k) Plan contributions as well as offering this plan to be competitive in the marketplace.
Eligible employees who enroll in the plan have the following deferral options: (i) eligible employees may elect to defer up to a maximum of 70 percent of base salary and 100 percent of annual bonus awards or (ii) eligible employees may elect a deferral percentage of base salary and bonus awards based on the deferral percentage elected for a year under the 401(k) Plan with such deferrals to start when maximum deferrals to the qualified 401(k) Plan have been made because of limitations in that plan. Eligible directors who enroll in the plan may elect to defer up to a maximum of 100 percent of directors' meeting fees and annual retainers. The Company matches employee (but not non-employee director) deferrals to make up for any match lost in the 401(k) Plan because of deferrals to the deferred compensation plan, and to allow for a match that would have been made under the 401(k) Plan on that portion of either the first six percent of total compensation or the first five percent of total compensation, depending on prior participant elections, deferred that exceeds the limits allowed in the 401(k) Plan. Matching credits vest based on years of service, with full vesting after three years or, if earlier, on retirement, disability, death, a change in control of the Company or termination of the plan. Deferrals, plus any Company match, are credited to a recordkeeping account in the participant's name. Earnings on the deferrals are indexed to the assumed investment funds selected by the participant. In 2014, those investment options included a Company Common Stock fund, whose value was determined based on the stock price of the Company's Common Stock. The Company accounts for the contributions related to the Company's executive officers in this plan as Accrued Benefit Obligations and the Company accounts for the contributions related to the Company's directors in this plan as Other Deferred Credits and Other Liabilities in the Consolidated Balance Sheets. The investment associated with these contributions is accounted for as Other Property and Investments in the Consolidated Balance Sheets. The appreciation of these investments is accounted for as Other Income and the increase in the liability under the plan is accounted for as Other Expense in the Consolidated Statements of Income.
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Supplemental Executive Retirement Plan
The Company provides a supplemental executive retirement plan in order to attract and retain lateral hires or other executives designated by the Compensation Committee of the Company's Board of Directors who may not otherwise qualify for a sufficient level of benefits under the Company's Pension Plan and Restoration of Retirement Income Plan. The supplemental executive retirement plan is intended to be an unfunded plan and not subject to the benefit limitations of the Code.

13. | Report of Business Segments

The Company reports its operations in two business segments: (i) the electric utility segment, which is engaged in the generation, transmission, distribution and sale of electric energy, and (ii) natural gas midstream operations segment.
As discussed in Note 3, in connection with the formation of Enable, effective May 1, 2013, OGE Energy deconsolidated its interest in Enogex Holdings and began accounting for its interest in Enable using the equity method of accounting. Accordingly, for periods through April 30, 2013, amounts reported for the natural gas midstream operations segment reflect the operating results of Enogex Holdings. Equity in earnings of unconsolidated affiliates in the natural gas midstream operations segment reflects OGE Energy's equity interest in Enable since May 1, 2013. Investment in unconsolidated affiliates in the natural gas midstream operations segment represents OGE Energy's investment in Enable.
Other Operations primarily includes the operations of the holding company.
Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations.
The following tables summarize the results of the Company's business segments for the years ended December 31, 2014, 2013 and 2012.

2014 | Electric Utility | Natural Gas Midstream Operations | Other Operations | Eliminations | Total
(In millions) |  |  |  |  |
Operating revenues | $ | 2,453.1 |  | $ | — |  | $ | — |  | $ | — |  | $ | 2,453.1 |
Cost of sales | 1,106.6 |  | — |  | — |  | — |  | 1,106.6 |
Other operation and maintenance | 453.2 |  | 1.2 |  | (14.8 | ) | — |  | 439.6 |
Depreciation and amortization | 270.8 |  | — |  | 10.6 |  | — |  | 281.4 |
Taxes other than income | 84.5 |  | — |  | 4.2 |  | — |  | 88.7 |
Operating income (loss) | 538.0 |  | (1.2 | ) | — |  | — |  | 536.8 |
Equity in earnings of unconsolidated affiliates | — |  | 172.6 |  | — |  | — |  | 172.6 |
Other income (expense) | 7.1 |  | — |  | 0.7 |  | (0.2 | ) | 7.6 |
Interest expense | 141.5 |  | — |  | 7.1 |  | (0.2 | ) | 148.4 |
Income tax expense | 111.6 |  | 69.1 |  | (7.9 | ) | — |  | 172.8 |
Net income (loss) | $ | 292.0 |  | $ | 102.3 |  | $ | 1.5 |  | $ | — |  | $ | 395.8 |
Investment in unconsolidated affiliates (at historical cost) | $ | — |  | $ | 1,318.2 |  | $ | — |  | $ | — |  | $ | 1,318.2 |
Total assets | $ | 8,266.2 |  | $ | 1,461.2 |  | $ | 129.2 |  | $ | (328.8 | ) | $ | 9,527.8 |
Capital expenditures | $ | 565.4 |  | $ | — |  | $ | 10.8 |  | $ | (6.9 | ) | $ | 569.3 |

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2013 | Electric Utility | Natural Gas Midstream Operations | Other Operations | Eliminations | Total
(In millions) |  |  |  |  |
Operating revenues | $ | 2,262.2 |  | $ | 630.4 |  | $ | — |  | $ | (24.9 | ) | $ | 2,867.7 |
Cost of sales | 965.9 |  | 489.0 |  | — |  | (26.0 | ) | 1,428.9 |
Other operation and maintenance | 438.8 |  | 60.9 |  | (10.5 | ) | — |  | 489.2 |
Depreciation and amortization | 248.4 |  | 36.8 |  | 12.1 |  | — |  | 297.3 |
Taxes other than income | 83.8 |  | 10.5 |  | 4.5 |  | — |  | 98.8 |
Operating income (loss) | 525.3 |  | 33.2 |  | (6.1 | ) | 1.1 |  | 553.5 |
Equity in earnings of unconsolidated affiliates | — |  | 101.9 |  | — |  | — |  | 101.9 |
Other income (expense) | 10.1 |  | 8.9 |  | (2.3 | ) | (0.5 | ) | 16.2 |
Interest expense | 129.3 |  | 10.6 |  | 8.1 |  | (0.5 | ) | 147.5 |
Income tax expense | 113.5 |  | 26.9 |  | (10.6 | ) | 0.5 |  | 130.3 |
Net income (loss) | 292.6 |  | 106.5 |  | (5.9 | ) | 0.6 |  | 393.8 |
Less: Net income attributable to noncontrolling interests | — |  | 6.6 |  | — |  | (0.4 | ) | 6.2 |
Net income attributable to OGE Energy | $ | 292.6 |  | $ | 99.9 |  | $ | (5.9 | ) | $ | 1.0 |  | $ | 387.6 |
Investment in unconsolidated affiliates (at historical cost) | $ | — |  | $ | 1,298.8 |  | $ | — |  | $ | — |  | $ | 1,298.8 |
Total assets | $ | 7,694.9 |  | $ | 1,348.6 |  | $ | 216.2 |  | $ | (125.0 | ) | $ | 9,134.7 |
Capital expenditures | $ | 797.6 |  | $ | 181.5 |  | $ | 11.5 |  | $ | — |  | $ | 990.6 |

2012 | Electric Utility | Natural Gas Midstream Operations | Other Operations | Eliminations | Total
(In millions) |  |  |  |  |
Operating revenues | $ | 2,141.2 |  | $ | 1,608.6 |  | $ | — |  | $ | (78.6 | ) | $ | 3,671.2 |
Cost of sales | 879.1 |  | 1,120.1 |  | — |  | (80.5 | ) | 1,918.7 |
Other operation and maintenance | 446.3 |  | 172.9 |  | (17.7 | ) | — |  | 601.5 |
Depreciation and amortization | 248.7 |  | 109.2 |  | 13.5 |  | — |  | 371.4 |
Gain on insurance proceeds | — |  | (7.5 | ) | — |  | — |  | (7.5 | )
Taxes other than income | 77.7 |  | 28.3 |  | 4.2 |  | — |  | 110.2 |
Operating income (loss) | 489.4 |  | 185.6 |  | — |  | 1.9 |  | 676.9 |
Other income (expense) | 10.1 |  | (3.5 | ) | 1.8 |  | (1.1 | ) | 7.3 |
Interest expense | 124.6 |  | 32.6 |  | 8.0 |  | (1.1 | ) | 164.1 |
Income tax expense | 94.6 |  | 45.7 |  | (5.8 | ) | 0.6 |  | 135.1 |
Net income (loss) | 280.3 |  | 103.8 |  | (0.4 | ) | 1.3 |  | 385.0 |
Less: Net income attributable to noncontrolling interests | — |  | 29.7 |  | — |  | 0.3 |  | 30.0 |
Net income attributable to OGE Energy | $ | 280.3 |  | $ | 74.1 |  | $ | (0.4 | ) | $ | 1.0 |  | $ | 355.0 |
Total assets | $ | 7,222.4 |  | $ | 2,681.3 |  | $ | 242.6 |  | $ | (224.1 | ) | $ | 9,922.2 |
Capital expenditures | $ | 704.4 |  | $ | 506.5 |  | $ | 18.3 |  | $ | — |  | $ | 1,229.2 |

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14. | Commitments and Contingencies

Operating Lease Obligations
The Company has operating lease obligations expiring at various dates, primarily for OG&E railcar leases, OG&E wind farm land leases and OGE Energy noncancellable operating lease. Future minimum payments for noncancellable operating leases are as follows:

Year ended December 31 (In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | After 2019 | Total
Operating lease obligations |  |  |  |  |  |  |
Railcars | $ | 4.5 |  | $ | 28.7 |  | $ | 1.0 |  | $ | — |  | $ | — |  | $ | — |  | $ | 34.2 |
Wind farm land leases | 2.1 |  | 2.1 |  | 2.4 |  | 2.4 |  | 2.4 |  | 46.4 |  | 57.8 |
OGE Energy noncancellable operating lease | 0.8 |  | 0.8 |  | 0.8 |  | 0.7 |  | — |  | — |  | 3.1 |
Total operating lease obligations | $ | 7.4 |  | $ | 31.6 |  | $ | 4.2 |  | $ | 3.1 |  | $ | 2.4 |  | $ | 46.4 |  | $ | 95.1 |

Payments for operating lease obligations were $6.7 million, $8.8 million and $14.2 million for the years ended December 31, 2014, 2013 and 2012, respectively.
OG&E Railcar Lease Agreement
OG&E has a noncancellable operating lease with purchase options, covering 1,387 coal rotary gondola railcars to transport coal from Wyoming to OG&E's coal-fired generation units. Rental payments are charged to Fuel Expense and are recovered through OG&E's tariffs and fuel adjustment clauses. On December 15, 2010, OG&E renewed the lease agreement effective February 1, 2011. At the end of the new lease term, which is February 1, 2016, OG&E has the option to either purchase the railcars at a stipulated fair market value or renew the lease. If OG&E chooses not to purchase the railcars or renew the lease agreement and the actual fair value of the railcars is less than the stipulated fair market value, OG&E would be responsible for the difference in those values up to a maximum of $22.8 million. OG&E is also required to maintain all of the railcars it has under the operating lease and has entered into an agreement with a non-affiliated company to furnish this maintenance.
On January 11, 2012, OG&E executed a five-year lease agreement for 135 railcars to replace railcars that have been taken out of service or destroyed. OG&E has a unilateral right to terminate this lease upon a 6-month notice effective April 2016.
On October 14, 2014, OG&E signed a three-year lease effective beginning December 2014 for 131 railcars to replace railcars that have been taken out of service or destroyed.
OG&E Wind Farm Land Lease Agreements
OG&E has wind farm land operating leases for its Centennial, OU Spirit and Crossroads wind farms expiring at various dates. The Centennial lease has rent escalations which increase annually based on the Consumer Price Index. The OU Spirit and Crossroads leases have rent escalations which increase after five and 10 years. Although the leases are cancellable, OG&E is required to make annual lease payments as long as the wind turbines are located on the land. OG&E does not expect to terminate the leases until the wind turbines reach the end of their economic life.
OGE Energy Noncancellable Operating Lease
On August 29, 2012, OGE Energy executed a five-year lease agreement for office space from September 1, 2013 to August 31, 2018. This lease has rent escalations which increase after five-years and allows for leasehold improvements.
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Other Purchase Obligations and Commitments
The Company's other future purchase obligations and commitments estimated for the next five years are as follows:

(In millions) | 2015 | 2016 | 2017 | 2018 | 2019 | Total
Other purchase obligations and commitments |  |  |  |  |  |
Cogeneration capacity and fixed operation and maintenance payments | $ | 85.2 |  | $ | 83.3 |  | $ | 80.7 |  | $ | 77.8 |  | $ | 70.6 |  | $ | 397.6 |
Expected cogeneration energy payments | 74.4 |  | 78.5 |  | 81.2 |  | 89.7 |  | 85.1 |  | 408.9 |
Minimum fuel purchase commitments | 389.3 |  | 246.6 |  | 43.6 |  | — |  | — |  | 679.5 |
Expected wind purchase commitments | 58.4 |  | 59.3 |  | 60.3 |  | 59.1 |  | 58.4 |  | 295.5 |
Long-term service agreement commitments | 2.5 |  | 2.6 |  | 2.7 |  | 19.4 |  | 27.5 |  | 54.7 |
Environmental compliance plan expenditures | 66.5 |  | 138.1 |  | 117.6 |  | 50.1 |  | 3.9 |  | 376.2 |
Total other purchase obligations and commitments | $ | 676.3 |  | $ | 608.4 |  | $ | 386.1 |  | $ | 296.1 |  | $ | 245.5 |  | $ | 2,212.4 |

Public Utility Regulatory Policy Act of 1978
At December 31, 2014, OG&E has QF contracts having terms of 15 to 32 years. These contracts were entered into pursuant to the Public Utility Regulatory Policy Act of 1978. Stated generally, the Public Utility Regulatory Policy Act of 1978 and the regulations thereunder promulgated by the FERC require OG&E to purchase power generated in a manufacturing process from a QF. The rate for such power to be paid by OG&E was approved by the OCC. The rate generally consists of two components: one is a rate for actual electricity purchased from the QF by OG&E; the other is a capacity charge, which OG&E must pay the QF for having the capacity available. However, if no electrical power is made available to OG&E for a period of time (generally three months), OG&E's obligation to pay the capacity charge is suspended. The total cost of cogeneration payments is recoverable in rates from customers. For the 320 MW AES-Shady Point, Inc. QF contract and the 120 MW Oklahoma Cogeneration, LLC QF contract, OG&E purchases 100 percent of the electricity generated by the QFs.
For the years ended December 31, 2014, 2013 and 2012, OG&E made total payments to cogenerators of $129.4 million, $134.8 million and $135.1 million, respectively, of which $72.3 million, $74.4 million and $77.1 million, respectively, represented capacity payments. All payments for purchased power, including cogeneration, are included in the Consolidated Statements of Income as Cost of Sales.
OG&E Minimum Fuel Purchase Commitments
OG&E purchased necessary fuel supplies of coal and natural gas for its generating units of $625.8 million, $657.3 million and $585.6 million for the years ended December 31, 2014, 2013 and 2012, respectively. OG&E has coal contracts for purchases through December 2016. As a participant in the SPP integrated marketplace, OG&E now purchases a relatively small percentage of its supply through term gas agreements. Alternatively, OG&E relies on a combination of call natural gas agreements, whereby OG&E has the right but not the obligation to purchase a defined quantity of natural gas, combined with day and intra-day purchases to meet the demands of the SPP market.
OG&E Wind Purchase Commitments
OG&E's current wind power portfolio includes the following, in addition to the 120 MW Centennial, 101 MW OU Spirit and 227.5 MW Crossroads wind farms owned by OG&E: (i) access to up to 50 MWs of electricity generated at a wind farm near Woodward, Oklahoma from a 15-year contract OG&E entered into with FPL Energy that expires in 2018, (ii) access to up to 152 MWs of electricity generated at a wind farm in Woodward County, Oklahoma from a 20-year contract OG&E entered into with CPV Keenan that expires in 2030, (iii) access to up to 130 MWs of electricity generated at a wind farm in Dewey County, Oklahoma from a 20-year contract OG&E entered into with Edison Mission Energy that expires in 2030 and (iv) access to up to 60 MWs of electricity generated at a wind farm near Blackwell, Oklahoma from a 20-year contract OG&E entered into with NextEra Energy that expires in 2032.
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The following table summarizes OG&E's wind power purchases for the years ended December 31, 2014, 2013 and 2012.

Year ended December 31 (In millions) | 2014 | 2013 | 2012
CPV Keenan | $ | 28.1 |  | $ | 30.9 |  | $ | 25.1 |
Edison Mission Energy | 21.3 |  | 20.6 |  | 20.2 |
FPL Energy | 3.6 |  | 3.3 |  | 3.4 |
NextEra Energy | 7.8 |  | 7.2 |  | 0.8 |
Total wind power purchased | $ | 60.8 |  | $ | 62.0 |  | $ | 49.5 |

OG&E Long-Term Service Agreement Commitments
OG&E has a long-term parts and service maintenance contract for the upkeep of the McClain Plant. The previous contract expired on January 1, 2015. The current contract, which was signed in May 2013, is expected to run for the earlier of 128,000 factored-fired hours or 3,600 factored-fired starts. Based on historical usage and current expectations for future usage, this contract is expected to run until 2030. The contract requires payments based on both a fixed and variable cost component, depending on how much the McClain Plant is used.
OG&E has a long-term parts and service maintenance contract for the upkeep of the Redbud Plant. In March 2013, the contract was amended to extend the contract coverage for an additional 24,000 factored-fired hours resulting in a maximum of the earlier of 144,000 factored-fired hours or 4,500 factored-fired starts. Based on historical usage and current expectations for future usage, this contract is expected to run until 2031. The contract requires payments based on both a fixed and variable cost component, depending on how much the Redbud Plant is used.
Enable Gas Transportation and Storage Agreement
OG&E contracts with Enable for gas transportation and storage services. The stated term of this contract expired April 30, 2009, but remained in effect from year-to-year thereafter. On January 31, 2014, in anticipation of entering into a new, five-year contract, OG&E provided written notice of termination of the contract, effective April 30, 2014. On March 17, 2014, OG&E entered into a new five year firm no-notice load following gas transportation contract with Enable effective May 1, 2014.
Environmental Laws and Regulations
The activities of OG&E are subject to numerous, stringent and complex Federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact OG&E's business activities in many ways including the handling or disposal of waste material, future construction activities to avoid or mitigate harm to threatened or endangered species and requiring the installation and operation of emissions pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. OG&E believes that its operations are in substantial compliance with current Federal, state and local environmental standards.
Environmental regulation can increase the cost of planning, design, initial installation and operation of OG&E's facilities. Historically, OG&E's total expenditures for environmental control facilities and for remediation have not been significant in relation to its consolidated financial position or results of operations. The Company believes, however, that it is reasonably likely that the trend in environmental legislation and regulations will continue towards more restrictive standards. Compliance with these standards is expected to increase the cost of conducting business. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market.
OG&E is managing several significant uncertainties about the scope and timing for the acquisition, installation and operation of additional pollution control equipment and compliance costs for a variety of the EPA rules that are being challenged in court. OG&E is unable to predict the financial impact of these matters with certainty at this time.
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Federal Clean Air Act New Source Review Litigation
As previously reported, in July 2008, OG&E received a request for information from the EPA regarding Federal Clean Air Act compliance at OG&E's Muskogee and Sooner generating plants.
On July 8, 2013, the Department of Justice filed a complaint against OG&E in United States District Court for the Western District of Oklahoma alleging that OG&E did not follow the Federal Clean Air Act procedures for projecting emission increases attributable to eight projects that occurred between 2003 and 2006. This complaint seeks to have OG&E submit a new assessment of whether the projects were likely to result in a significant emissions increase. The Sierra Club intervened in this proceeding. On August 30, 2013, the Government filed a Motion for Summary Judgment and on September 6, 2013, OG&E filed a Motion to Dismiss the case. On January 15, 2015, U.S. District Judge Timothy DeGuisti dismissed the complaints filed by EPA and Sierra Club. The Court held that it lacked subject matter jurisdiction over Plaintiffs’ claims because Plaintiffs failed to present an actual “case or controversy” as required by Article III of the Constitution. The court also ruled in the alternative that, even if Plaintiffs had presented a case or controversy, it would have nonetheless “decline[d] to exercise jurisdiction.” EPA and the Sierra Club have until March 16, 2015 to file an appeal of the Court’s ruling.
On August 12, 2013, the Sierra Club filed a separate complaint against OG&E in the United States District Court for the Eastern District of Oklahoma alleging that OG&E projects at Muskogee Unit 6 in 2008 were made without obtaining a prevention of significant deterioration permit and that the plant had exceeded emissions limits for opacity and particulate matter. The Sierra Club seeks a permanent injunction preventing OG&E from operating the Muskogee generating plant. On March 4, 2014, the Eastern District dismissed the prevention of significant deterioration permit claim based on the statute of limitations, but allowed the opacity and particulate matter claims to proceed. To obtain the right to appeal this decision, the Sierra Club subsequently withdrew a Notice of Intent to Sue for additional Clean Air Act violations and asked the Eastern District to dismiss its remaining claims with prejudice. On August 27, 2014, the Eastern District granted the Sierra Club's request. The Sierra Club has filed a Notice of Appeal with the 10th Circuit where oral argument is currently scheduled for March 18, 2015.
At this time, OG&E continues to believe that it has acted in compliance with the Federal Clean Air Act, and OG&E expects to vigorously defend against the claims that have been asserted. If OG&E does not prevail in the remainder of the proceedings, the EPA and the Sierra Club could seek to require OG&E to install additional pollution control equipment, including scrubbers, baghouses and selective catalytic reduction systems with capital costs in excess of $1.1 billion and pay fines and significant penalties as a result of the allegations in the notice of violation. Section 113 of the Federal Clean Air Act (along with the Federal Civil Penalties Inflation Adjustment Act of 1996) provides for civil penalties as much as $37,500 per day for each violation. Due to the uncertain and preliminary nature of this litigation, OG&E cannot provide a range of reasonably possible loss in this case.
Air Quality Control System
On September 10, 2014, OG&E executed a contract for the design, engineering and fabrication of two circulating dry scrubber systems to be installed at Sooner Units 1 and 2. OG&E entered into an agreement on February 9, 2015, to install the scrubber systems. The scrubbers are part of OG&E’s Environmental Compliance Plan and scheduled to be completed by 2019. More detail regarding the Environmental Plan can be found under the “Pending Regulatory Matters” in Note 15.
Other
In the normal course of business, the Company is confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other appropriate experts to assess the claim. If, in management's opinion, the Company has incurred a probable loss as set forth by GAAP, an estimate is made of the loss and the appropriate accounting entries are reflected in the Company's Consolidated Financial Statements. At the present time, based on currently available information, the Company believes that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to its financial statements and would not have a material adverse effect on the Company's consolidated financial position, results of operations or cash flows.
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15. | Rate Matters and Regulation

Regulation and Rates
OG&E's retail electric tariffs are regulated by the OCC in Oklahoma and by the APSC in Arkansas. The issuance of certain securities by OG&E is also regulated by the OCC and the APSC. OG&E's wholesale electric tariffs, transmission activities, short-term borrowing authorization and accounting practices are subject to the jurisdiction of the FERC. The Secretary of the U.S. Department of Energy has jurisdiction over some of OG&E's facilities and operations. In 2014, 84 percent of OG&E's electric revenue was subject to the jurisdiction of the OCC, eight percent to the APSC and eight percent to the FERC.
The OCC issued an order in 1996 authorizing OG&E to reorganize into a subsidiary of OGE Energy. The order required that, among other things, (i) OGE Energy permit the OCC access to the books and records of OGE Energy and its affiliates relating to transactions with OG&E, (ii) OGE Energy employ accounting and other procedures and controls to protect against subsidization of non-utility activities by OG&E's customers and (iii) OGE Energy refrain from pledging OG&E assets or income for affiliate transactions. In addition, the Energy Policy Act of 2005 enacted the Public Utility Holding Company Act of 2005, which in turn granted to the FERC access to the books and records of OGE Energy and its affiliates as the FERC deems relevant to costs incurred by OG&E or necessary or appropriate for the protection of utility customers with respect to the FERC jurisdictional rates.
Completed Regulatory Matters
Market-Based Rate Authority
On June 29, 2012, OG&E filed its triennial market power update with the FERC to retain its market-based rate authorization in the SPP's energy imbalance service market but to surrender its market-based rate authorization for any market-based rates sales outside of the SPP's energy imbalance service market. On May 2, 2013, the FERC issued an order accepting OG&E's June 2012 triennial market power update.
On December 30, 2013, OG&E submitted to the FERC a market-based rate change in status filing and a revised market-based rate tariff that would authorize OG&E to (i) sell electric energy and capacity at market-based rates without geographic restriction, and (ii) sell ancillary services in the SPP and Midcontinent Independent System Operator, Inc. markets. The primary goal of this filing was to implement the market-based rate authority OG&E needs to fully participate in SPP’s Integrated Marketplace. On February 28, 2014, FERC issued a letter order accepting OG&E’s market-based rate filing and tariff effective March 1, 2014. FERC found that OG&E passed the market power screens and satisfied requirements related to horizontal market power and vertical market power.
Section 206 Complaint
On November 26, 2013, Arkansas Electric Cooperative Corporation filed a complaint at the FERC against OG&E, arguing that the wholesale formula rate contract between OG&E and Arkansas Electric Cooperative Corporation (formerly between OG&E and Arkansas Valley Electric Cooperative) is unjust and unreasonable with respect to several items. OG&E and Arkansas Electric Cooperative Corporation agreed to terms of a settlement and filed the offer of settlement with the FERC on February 24, 2014. On April 17, 2014, the FERC accepted the settlement making it effective March 1, 2014. The reduction in revenue for 2014 was $0.9 million.
Fuel Adjustment Clause Review for Calendar Year 2012
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2013, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2012, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on October 9, 2013. On April 24, 2014, the OCC administrative law judge at the hearing, on the merits, recommended that the OCC find that OG&E's 2012 electric generation, purchased power and fuel procurement processes and costs were prudent. On June 10, 2014, the OCC issued an order approving OG&E’s practices, policies and judgment regarding its electric generation, purchased power, and fuel procurement processes and costs for the calendar year 2012. The order also found that the costs were prudent, reasonable, and mathematically correct.
Integrated Resource Plans
In June 2014, OG&E initiated the process to update its Integrated Resource Plans in Oklahoma and Arkansas at OG&E's discretion. The prior Integrated Resource Plan, submitted in 2012, assumed that the Oklahoma SIP would be followed to comply
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with Regional Haze requirements. Subsequent to holding technical conferences and public stakeholder meetings, OG&E submitted its revised Integrated Resource Plans, which included its environmental compliance plan described below, to the OCC on August 4, 2014 and to the APSC on September 8, 2014.
Pending Regulatory Matter s
FERC Order No. 1000, Final Rule on Transmission Planning and Cost Allocation
On July 21, 2011, the FERC issued Order No. 1000, which revised the FERC's existing regulations governing the process for planning enhancements and expansions of the electric transmission grid in a particular region, along with the corresponding process for allocating the costs of such expansions. Order No. 1000 leaves to individual regions to determine whether a previously-approved project is subject to reevaluation and is therefore governed by the new rule.
Order No. 1000 requires, among other things, public utility transmission providers, such as the SPP, to participate in a process that produces a regional transmission plan satisfying certain standards, and requires that each such regional process consider transmission needs driven by public policy requirements (such as state or Federal policies favoring increased use of renewable energy resources). Order No. 1000 also directs public utility transmission providers to coordinate with neighboring transmission planning regions. In addition, Order No. 1000 establishes specific regional cost allocation principles and directs public utility transmission providers to participate in regional and interregional transmission planning processes that satisfy these principles.
On the issue of determining how entities are to be selected to develop and construct the specific transmission projects, Order No. 1000 directs public utility transmission providers to remove from the FERC-jurisdictional tariffs and agreements provisions that establish any Federal "right of first refusal" for the incumbent transmission owner (such as OG&E) regarding transmission facilities selected in a regional transmission planning process, subject to certain limitations. However, Order No. 1000 is not intended to affect the right of an incumbent transmission owner (such as OG&E) to build, own and recover costs for upgrades to its own transmission facilities, and Order No. 1000 does not alter an incumbent transmission owner's use and control of existing rights of way. Order No. 1000 also clarifies that incumbent transmission owners may rely on regional transmission facilities to meet their reliability needs or service obligations. The SPP's pre-Order No. 1000 tariff included a "right of first refusal" for incumbent transmission owners and this provision has played a role in OG&E being selected by the SPP to build previous transmission projects in Oklahoma. These changes to the "right of first refusal" apply only to "new transmission facilities," which are facilities subject to evaluation or reevaluation (under the applicable local or regional transmission planning process) after November 13, 2012. On May 29, 2013, the Governor signed House Bill 1932 into law which establishes a right of first refusal for Oklahoma incumbent transmission owners, including OG&E, to build new transmission projects with voltages under 300 kilovolts that interconnect to those incumbent owners' existing facilities. OG&E believes this law is consistent with the language of Order No. 1000. On August 15, 2014, the U.S. Court of Appeals for the D.C. Circuit issued an order denying all appeals of Order No. 1000.
The FERC has issued two orders on the SPP's Order No. 1000 compliance filings. In its most recent order, issued October 16, 2014, the FERC confirmed that “right of first refusal” language should be removed from the SPP tariff and Membership Agreement as applied to most transmission facilities, but that several types of facilities would remain subject to a right of first refusal. Projects that retained the right of first refusal included facilities that would operate below 100 kilovolts, facilities selected as part of the SPP’s Aggregate Study process, and short-term reliability projects. The FERC also approved SPP’s new competitive solicitation process for projects that are not subject to a right of first refusal. FERC found that SPP may consider state and local laws and regulations when deciding whether SPP will hold a competitive solicitation for a proposed project. On December 15, 2014, OG&E filed an appeal in the District of Columbia Circuit Court of Appeals of a portion of the October 2014 FERC order requiring removal of the right of first refusal language from the Membership Agreement. The court has not yet acted on OG&E's appeal.
OGE Energy cannot, at this time, determine the precise impact of Order No. 1000 on OG&E. OGE Energy has no reason to believe that the implementation of Order No. 1000 will impact OG&E's transmission projects currently under development and construction for which OG&E has received a notice to proceed from the SPP.
Energy Efficiency Program Filing
On February 14, 2014, OG&E filed an application with the APSC requesting approval of interim modifications to approved Energy Efficiency Programs, new tariff revisions and the waiver of certain provisions of the Commission’s Rules for Conservation and Energy Efficiency Programs.
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Environmental Compliance Plan
On August 6, 2014, OG&E filed an application with the OCC for approval of its plan to comply with EPA’s MATS and Regional Haze FIP while serving the best long-term interests of customers in light of future environmental uncertainties. The application seeks approval of the environmental compliance plan and for a recovery mechanism for the associated costs. The environmental compliance plan includes installing dry scrubbers at Sooner Units 1 and 2 and the conversion of Muskogee Units 4 and 5 to natural gas. The application also asks the Commission to predetermine the prudence of replacing OG&E's soon-to-be retired Mustang steam turbines in late 2017 (approximately 460 MW) with 400 MW of new, efficient combustion turbines at the Mustang site in 2018 and 2019 and approval for a recovery mechanism for the associated costs. OG&E estimates the total capital cost associated with its environmental compliance plan included in this application to be approximately $1.1 billion. The OCC hearing on OG&E's application is scheduled to commence on March 3, 2015. Multiple parties advocating a variety of positions have intervened in the proceeding. OG&E expects a ruling from the OCC in the second quarter of 2015. At this time, OG&E cannot predict the outcome of the proceeding. OG&E plans to file applications in the first quarter of 2015 seeking related approvals from the APSC.
Fuel Adjustment Clause Review for Calendar Year 2013
The OCC routinely reviews the costs recovered from customers through OG&E's fuel adjustment clause. On July 31, 2014, the OCC Staff filed an application to review OG&E's fuel adjustment clause for calendar year 2013, including the prudence of OG&E's electric generation, purchased power and fuel procurement costs. OG&E filed the necessary information and documents needed to satisfy the OCC's minimum filing requirement rules on September 29, 2014. A procedural schedule has not been established as of this date. OG&E expects an order in the second quarter of 2015.
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16. | Quarterly Financial Data (Unaudited)

Due to the seasonal fluctuations and other factors of the Company's businesses, the operating results for interim periods are not necessarily indicative of the results that may be expected for the year. In the Company's opinion, the following quarterly financial data includes all adjustments, consisting of normal recurring adjustments, necessary to fairly present such amounts. Summarized consolidated quarterly unaudited financial data is as follows:

Quarter ended (In millions, except per share data) |  | March 31 | June 30 | September 30 | December 31 | Total
Operating revenues | 2014 | $ | 560.4 |  | $ | 611.8 |  | $ | 754.7 |  | $ | 526.2 |  | $ | 2,453.1 |
| 2013 | $ | 901.4 |  | $ | 734.2 |  | $ | 723.2 |  | $ | 508.9 |  | $ | 2,867.7 |
Operating income | 2014 | $ | 61.8 |  | $ | 141.8 |  | $ | 248.1 |  | $ | 85.1 |  | $ | 536.8 |
| 2013 | $ | 75.4 |  | $ | 143.9 |  | $ | 260.9 |  | $ | 73.3 |  | $ | 553.5 |
Net income | 2014 | $ | 49.3 |  | $ | 100.8 |  | $ | 187.3 |  | $ | 58.4 |  | $ | 395.8 |
| 2013 | $ | 28.0 |  | $ | 93.0 |  | $ | 215.2 |  | $ | 57.6 |  | $ | 393.8 |
Net income attributable to OGE Energy | 2014 | $ | 49.3 |  | $ | 100.8 |  | $ | 187.3 |  | $ | 58.4 |  | $ | 395.8 |
| 2013 | $ | 23.1 |  | $ | 91.7 |  | $ | 215.2 |  | $ | 57.6 |  | $ | 387.6 |
Basic earnings per average common share attributable to OGE Energy common shareholders (A) | 2014 | $ | 0.25 |  | $ | 0.51 |  | $ | 0.94 |  | $ | 0.29 |  | $ | 1.99 |
| 2013 | $ | 0.12 |  | $ | 0.46 |  | $ | 1.08 |  | $ | 0.29 |  | $ | 1.96 |
Diluted earnings per average common share attributable to OGE Energy common shareholders (A) | 2014 | $ | 0.25 |  | $ | 0.50 |  | $ | 0.94 |  | $ | 0.29 |  | $ | 1.98 |
| 2013 | $ | 0.12 |  | $ | 0.46 |  | $ | 1.08 |  | $ | 0.29 |  | $ | 1.94 |

(A) | Due to the impact of dilution on the earnings per share calculation, quarterly earnings per share amounts may not add to the total.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors and Stockholder s
OGE Energy Corp.
We have audited the accompanying consolidated balance sheets and statements of capitalization of OGE Energy Corp.(the Company) as of December 31, 2014 and 2013, and the related consolidated statements of income, comprehensive income, cash flows and changes in stockholder s' equity for each of the three years in the period ended December 31, 2014. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits. We did not audit the consolidated financial statements of Enable Midstream Partners, LP (Enable), a partnership in which the Company has a 26.3 percent interest at December 31, 2014. The Company’s investment in Enable constituted 13.8 percent and 14.2 percent of the Company’s assets as of December 31, 2014 and 2013, respectively, and the Company’s equity earnings in the net income of Enable constituted 30.4 percent and 19.4 percent of the Company’s income before income taxes for the year ended December 31, 2014 and 2013, respectively (none for the year ended December 31, 2012). Those statements were audited by other auditors whose report has been furnished to us, and our opinion, insofar as it relates to the amounts included for Enable, is based solely on the report of the other auditors.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits and the report of other auditors provide a reasonable basis for our opinion.
In our opinion, based on our audits and the report of other auditors, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of OGE Energy Corp. at December 31, 2014 and 2013, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2014, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), OGE Energy Corp.'s internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 26, 2015 expressed an unqualified opinion thereon.

| /s/ Ernst & Young LLP |
| Ernst & Young LLP |

Oklahoma City, Oklahoma
February 26, 2015
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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
None.
Item 9A. Controls and Procedures.
The Company maintains a set of disclosure controls and procedures designed to ensure that information required to be disclosed by the Company in reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission rules and forms. In addition, the disclosure controls and procedures ensure that information required to be disclosed is accumulated and communicated to management, including the chief executive officer and chief financial officer, allowing timely decisions regarding required disclosure. As of the end of the period covered by this report, based on an evaluation carried out under the supervision and with the participation of the Company's management, including the chief executive officer and chief financial officer, of the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15(d)-15(e) under the Securities Exchange Act of 1934), the chief executive officer and chief financial officer have concluded that the Company's disclosure controls and procedures are effective.
No change in the Company's internal control over financial reporting has occurred during the Company's most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934).
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Management's Report on Internal Control Over Financial Reporting
The management of the Company i s responsible for establishing and maintaining adequate internal control over financial reporting. The Company's internal control system was designed to provide reasonable assurance to the Company's management and Board of Directors regarding the preparation and fair presentation of published financial statements. All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.
The Company's management assessed the effectiveness of the Company's internal control over financial reporting as of December 31, 2014. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control-Integrated Framework (2013). Based on our assessment, we believe that, as of December 31, 2014, the Company's internal control over financial reporting is effective based on those criteria.
The Company's independent auditors have issued an attestation report on the Company's internal control over financial reporting. This report appears on the following page.

/s/ Peter B. Delaney |  | /s/ Scott Forbes
Peter B. Delaney, Chairman of the Board |  | Scott Forbes, Controller
and Chief Executive Officer |  | and Chief Accounting Officer
/s/ Stephen Merrill |  |
Stephen Merrill |  |
Chief Financial Officer |  |

130

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors and Stockholder s
OGE Energy Corp.
We have audited OGE Energy Corp.'s internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). OGE Energy Corp.'s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the company's internal control over financial reporting based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
In our opinion, OGE Energy Corp. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets and statements of capitalization of OGE Energy Corp. as of December 31, 2014 and 2013, and the related consolidated statements of income, comprehensive income, cash flows and changes in stockholder s' equity for each of the three years in the period ended December 31, 2014 of OGE Energy Corp. and our report dated February 26, 2015 expressed an unqualified opinion thereon.

| /s/ Ernst & Young LLP |
| Ernst & Young LLP |

Oklahoma City, Oklahoma
February 26, 2015
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Item 9B. Other Information.
None.
PART III
Item 10. Directors, Executive Officers and Corporate Governance.
Code of Ethics Policy
OGE Energy maintains a code of ethics for our chief executive officer and senior financial officers, including the chief financial officer and chief accounting officer, which is available for public viewing on OGE Energy's web site address www.oge.com under the heading "Investor Relations", "Corporate Governance." The code of ethics will be provided, free of charge, upon request. OGE Energy intends to satisfy the disclosure requirements under Section 5, Item 5.05 of Form 8-K regarding an amendment to, or waiver from, a provision of the code of ethics by posting such information on its web site at the location specified above. OGE Energy will also include in its proxy statement information regarding the Audit Committee financial experts.
Item 11. Executive Compensation.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
Item 13. Certain Relationships and Related Transactions, and Director Independence.
Item 14. Principal Accounting Fees and Services.
Items 10 through 14 (other than Item 10 information regarding the Code of Ethics) are omitted pursuant to General Instruction G of Form 10-K, because the Company will file copies of a definitive proxy statement with the Securities and Exchange Commission on or about March 27, 2015. Such proxy statement is incorporated herein by reference.
PART IV
Item 15. Exhibits, Financial Statement Schedules.
(a) 1. Financial Statements

(i) | The following Consolidated Financial Statements are included in Part II, Item 8 of this Annual Report:

• | Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012

• | Consolidated Statements of Comprehensive Income for the years ended December 31, 2014, 2013 and 2012

• | Consolidated Statements of Cash Flows for the years ended December 31, 2014, 2013 and 2012

• | Consolidated Balance Sheets at December 31, 2014 and 2013

• | Consolidated Statements of Capitalization at December 31, 2014 and 2013

• | Consolidated Statements of Changes in Stockholders' Equity for the years ended December 31, 2014, 2013 and 2012

• | Notes to Consolidated Financial Statements

• | Report of Independent Registered Public Accounting Firm (Audit of Financial Statements)

• | Management's Report on Internal Control Over Financial Reporting

• | Report of Independent Registered Public Accounting Firm (Audit of Internal Control)

(ii) | The financial statements of Enable Midstream Partners, LP, required pursuant to Rule 3-09 of Regulation S-X are filed as Exhibit 99.06

2. Financial Statement Schedule (included in Part IV)

• | Schedule II - Valuation and Qualifying Accounts

All other schedules have been omitted since the required information is not applicable or is not material, or because the information required is included in the respective Consolidated Financial Statements or Notes thereto.
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3. Exhibits

Exhibit No. | Description
2.01 | Asset Purchase Agreement, dated as of August 18, 2003 by and between OG&E and NRG McClain LLC. (Certain exhibits and schedules were omitted and registrant agrees to furnish supplementally a copy of such omitted exhibits and schedules to the Commission upon request) (Filed as Exhibit 2.01 to OGE Energy's Form 8-K filed August 20, 2003 (File No. 1-12579) and incorporated by reference herein)
2.02 | Amendment No. 1 to Asset Purchase Agreement, dated as of October 22, 2003 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.03 to OGE Energy's Form 10-K for the year ended December 31, 2003 (File No. 1-12579) and incorporated by reference herein)
2.03 | Amendment No. 2 to Asset Purchase Agreement, dated as of October 27, 2003 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.04 to OGE Energy's Form 10-K for the year ended December 31, 2003 (File No. 1-12579) and incorporated by reference herein)
2.04 | Amendment No. 3 to Asset Purchase Agreement, dated as of November 25, 2003 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.05 to OGE Energy's Form 10-K for the year ended December 31, 2003 (File No. 1-12579) and incorporated by reference herein)
2.05 | Amendment No. 4 to Asset Purchase Agreement, dated as of January 28, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.06 to OGE Energy's Form 10-K for the year ended December 31, 2003 (File No. 1-12579) and incorporated by reference herein)
2.06 | Amendment No. 5 to Asset Purchase Agreement, dated as of February 13, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.07 to OGE Energy's Form 10-K for the year ended December 31, 2003 (File No. 1-12579) and incorporated by reference herein)
2.07 | Amendment No. 6 to Asset Purchase Agreement, dated as of March 12, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.01 to OGE Energy's Form 10-Q for the quarter ended March 31, 2004 (File No. 1-12579) and incorporated by reference herein)
2.08 | Amendment No. 7 to Asset Purchase Agreement, dated as of April 15, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.02 to OGE Energy's Form 10-Q for the quarter ended March 31, 2004 (File No. 1-12579) and incorporated by reference herein)
2.09 | Amendment No. 8 to Asset Purchase Agreement, dated as of May 15, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.01 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)
2.10 | Amendment No. 9 to Asset Purchase Agreement, dated as of June 2, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.02 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)
2.11 | Amendment No. 10 to Asset Purchase Agreement, dated as of June 17, 2004 by and between OG&E and NRG McClain LLC. (Filed as Exhibit 2.03 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)
2.12 | Purchase and Sale Agreement, dated as of January 21, 2008, entered into by and among Redbud Energy I, LLC, Redbud Energy II, LLC and Redbud Energy III, LLC and OG&E. (Certain exhibits and schedules hereto have been omitted and the registrant agrees to furnish supplementally a copy of such omitted exhibits and schedules to the Commission upon request) (Filed as Exhibit 2.01 to OGE Energy's Form 8-K filed January 25, 2008 (File No. 1-12579) and incorporated by reference herein)
2.13 | Asset Purchase Agreement, dated as of January 21, 2008, entered into by and among OG&E, the Oklahoma Municipal Power Authority and the Grand River Dam Authority. (Certain exhibits and schedules hereto have been omitted and the registrant agrees to furnish supplementally a copy of such omitted exhibits and schedules to the Commission upon request) (Filed as Exhibit 2.01 to OGE Energy's Form 8-K filed January 25, 2008 (File No. 1-12579) and incorporated by reference herein)
2.14 | Master Formation Agreement dated as of March 14, 2013 by and among CenterPoint Energy, Inc., OGE Energy Corp., Bronco Midstream Holdings, LLC and Bronco Midstream Holdings II, LLC. (Filed as Exhibit 2.01 to OGE Energy's Form 8-K filed March 15, 2013 (File No. 1-12579) and incorporated by reference herein).
3.01 | Copy of Restated OGE Energy Corp. Certificate of Incorporation. (Filed as Exhibit 3.01 to OGE Energy's Form 10-Q for the quarter ended June 30, 2013 (File No. 1-12579) and incorporated by reference herein).
3.02 | Copy of Amended OGE Energy Corp. By-laws. (Filed as Exhibit 3.02 to OGE Energy's Form 10-Q for the quarter ended June 30, 2010 (File No. 1-12579) and incorporated by reference herein)
4.01 | Trust Indenture dated October 1, 1995, from OG&E to Boatmen's First National Bank of Oklahoma, Trustee. (Filed as Exhibit 4.29 to Registration Statement No. 33-61821 and incorporated by reference herein)
4.02 | Supplemental Indenture No. 2, dated as of July 1, 1997, being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed July 17, 1997 (File No. 1-1097) and incorporated by reference herein)

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4.03 | Supplemental Indenture No. 3, dated as of April 1, 1998, being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed April 16, 1998 (File No. 1-1097) and incorporated by reference herein)
4.04 | Supplemental Indenture No. 5 dated as of October 24, 2001, being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.06 to Registration Statement No. 333-104615 and incorporated by reference herein)
4.05 | Supplemental Indenture No. 6 dated as of August 1, 2004, being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.02 to OG&E's Form 8-K filed August 6, 2004 (File No 1-1097) and incorporated by reference herein)
4.06 | Supplemental Indenture No. 7 dated as of January 1, 2006 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.08 to OG&E's Form 8-K filed January 6, 2006 (File No. 1-1097) and incorporated by reference herein)
4.07 | Supplemental Indenture No. 8 dated as of January 15, 2008 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed January 31, 2008 (File No. 1-1097) and incorporated by reference herein)
4.08 | Supplemental Indenture No. 9 dated as of September 1, 2008 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed September 9, 2008 (File No. 1-1097) and incorporated by reference herein)
4.09 | Supplemental Indenture No. 10 dated as of December 1, 2008 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed December 11, 2008 (File No. 1-1097) and incorporated by reference herein)
4.10 | Supplemental Indenture No. 11 dated as of June 1, 2010 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed June 8, 2010 (File No. 1-1097) and incorporated by reference herein)
4.11 | Supplemental Indenture No. 12 dated as of May 15, 2011 being a supplemental instrument to Exhibit 4.01 hereto. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed May 27, 2011 (File No. 1-1097) and incorporated by reference herein)
4.12 | Supplemental Indenture No. 13 dated as of May 1, 2013 between OG&E and UMB Bank, N.A., as trustee, creating the Senior Notes. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed May 13, 2013 (File No. 1-1097) and incorporated by reference herein)
4.13 | Supplemental Indenture No. 14 dated as of March 15, 2014 between OG&E and UMB Bank, N.A., as trustee, creating the Senior Notes. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed March 25, 2014 (File No. 1-1097) and incorporated by reference herein)
4.14 | Supplemental Indenture No. 15 dated as of December 1, 2014 between OG&E and UMB Bank, N.A., as trustee, creating the Senior Notes. (Filed as Exhibit 4.01 to OG&E's Form 8-K filed December 11, 2014 (File No. 1-1097) and incorporated by reference herein)
4.15 | Indenture dated as of November 1, 2004 between OGE Energy Corp. and UMB Bank, N.A., as trustee. (Filed as Exhibit 4.01 to OGE Energy's Form 8-K filed November 12, 2004 (File No. 1-12579) and incorporated by reference herein)
4.16 | Supplemental Indenture No. 1 dated as of November 9, 2004 between OGE Energy Corp. and UMB Bank, N.A., as trustee. (Filed as Exhibit 4.02 to OGE Energy's Form 8-K filed November 12, 2004 (File No. 1-12579) and incorporated by reference herein)
4.17 | Supplemental Indenture No. 2 dated as of November 24, 2014 between OGE Energy and UMB Bank, N.A, as trustee, creating the Senior Notes. (Filed as Exhibit 4.01 to OGE Energy's Form 8-K filed November 24, 2014 (File No. 1-12579) and incorporated by reference herein)
10.01* | OGE Energy's 1998 Stock Incentive Plan. (Filed as Exhibit 10.07 to OGE Energy's Form 10-K for the year ended December 31, 1998 (File No. 1-12579) and incorporated by reference herein)
10.02* | OGE Energy's 2003 Stock Incentive Plan. (Filed as Annex A to OGE Energy's Proxy Statement for the 2003 Annual Meeting of Shareowners (File No. 1-12579) and incorporated by reference herein)
10.03 | Copy of Settlement Agreement with Oklahoma Corporation Commission Staff, the Oklahoma Attorney General and others relating to OG&E's rate case. (Filed as Exhibit 99.02 to OGE Energy's Form 8-K filed July 9, 2012 (File No. 1-12579) and incorporated by reference herein)
10.04 | Amended and Restated Facility Operating Agreement for the McClain Generating Facility dated as of July 9, 2004 between OG&E and the Oklahoma Municipal Power Authority. (Filed as Exhibit 10.03 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)
10.05 | Amended and Restated Ownership and Operation Agreement for the McClain Generating Facility dated as of July 9, 2004 between OG&E and the Oklahoma Municipal Power Authority. (Filed as Exhibit 10.04 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)

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10.06 | Operating and Maintenance Agreement for the Transmission Assets of the McClain Generating Facility dated as of August 25, 2003 between OG&E and the Oklahoma Municipal Power Authority. (Filed as Exhibit 10.05 to OGE Energy's Form 10-Q for the quarter ended June 30, 2004 (File No. 1-12579) and incorporated by reference herein)
10.07* | Amendment No. 1 to OGE Energy's 2003 Stock Incentive Plan. (Filed as Exhibit 10.23 to OGE Energy's Form 10-K for the year ended December 31, 2004 (File No. 1-12579) and incorporated by reference herein)
10.08 | Intrastate Firm No-Notice, Load Following Transportation and Storage Services Agreement dated as of May 1, 2003 between OG&E and Enogex. [Confidential treatment has been requested for certain portions of this exhibit.] (Filed as Exhibit 10.24 to OGE Energy's Form 10-K for the year ended December 31, 2004 (File No. 1-12579) and incorporated by reference herein)
10.09* | Form of Split Dollar Agreement. (Filed as Exhibit 10.32 to OGE Energy's Form 10-K for the year ended December 31, 2004 (File No. 1-12579) and incorporated by reference herein)
10.10 | Credit agreement dated as of December 13, 2011, by and between OGE Energy, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC, UBS Securities LLC and Union Bank, N.A., as Co-Documentation Agents. (Filed as Exhibit 99.01 to OGE Energy's Form 8-K filed December 19, 2011 (File No. 1-12579) and incorporated by reference herein)
10.11 | Credit agreement dated as of December 13, 2011, by and between OG&E, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC, UBS Securities LLC and Union Bank, N.A., as Co-Documentation Agents. (Filed as Exhibit 99.02 to OGE Energy's Form 8-K filed December 19, 2011 (File No. 1-12579) and incorporated by reference herein)
10.12* | Amendment No. 1 to OGE Energy's 1998 Stock Incentive Plan. (Filed as Exhibit 10.26 to OGE Energy's Form 10-K for the year ended December 31, 2006 (File No. 1-12579) and incorporated by reference herein)
10.13* | Amendment No. 2 to OGE Energy's 2003 Stock Incentive Plan. (Filed as Exhibit 10.27 to OGE Energy's Form 10-K for the year ended December 31, 2006 (File No. 1-12579) and incorporated by reference herein)
10.14* | OGE Energy Supplemental Executive Retirement Plan, as amended and restated. (Filed as Exhibit 10.03 to OGE Energy's Form 10-Q for the quarter ended March 31, 2008 (File No. 1-12579) and incorporated by reference herein)
10.15* | OGE Energy Restoration of Retirement Income Plan, as amended and restated. (Filed as Exhibit 10.04 to OGE Energy's Form 10-Q for the quarter ended March 31, 2008 (File No. 1-12579) and incorporated by reference herein)
10.16* | OGE Energy Deferred Compensation Plan, as amended and restated. (Filed as Exhibit 10.05 to OGE Energy's Form 10-Q for the quarter ended March 31, 2008 (File No. 1-12579) and incorporated by reference herein)
10.17* | Amendment No. 3 to OGE Energy's 2003 Stock Incentive Plan. (Filed as Exhibit 10.06 to OGE Energy's Form 10-Q for the quarter ended March 31, 2008 (File No. 1-12579) and incorporated by reference herein)
10.18* | Amendment No. 2 to OGE Energy's 1998 Stock Incentive Plan. (Filed as Exhibit 10.07 to OGE Energy's Form 10-Q for the quarter ended March 31, 2008 (File No. 1-12579) and incorporated by reference herein)
10.19* | OGE Energy's 2008 Stock Incentive Plan. (Filed as Annex A to OGE Energy's Proxy Statement for the 2008 Annual Meeting of Shareowners (File No. 1-12579) and incorporated by reference herein)
10.20* | OGE Energy's 2008 Annual Incentive Compensation Plan. (Filed as Annex B to OGE Energy's Proxy Statement for the 2008 Annual Meeting of Shareowners (File No. 1-12579) and incorporated by reference herein)
10.21* | Form of Employment Agreement for all existing and future officers of the Company relating to change of control. (Filed as Exhibit 10.28 to OGE Energy's Form 10-K for the year ended December 31, 2011 (File No. 1-12579) and incorporated by reference herein)
10.22* | Form of Restricted Stock Agreement under OGE Energy's 2008 Stock Incentive Plan. (Filed as Exhibit 10.01 to OGE Energy's Form 10-Q for the quarter ended September 30, 2008 (File No. 1-12579) and incorporated by reference herein)
10.23 | Agreement, dated February 17, 2010, between OG&E and Oklahoma Department of Environmental Quality. (Filed as Exhibit 99.01 to OGE Energy's Form 8-K filed February 23, 2010 (File No. 1-12579) and incorporated by reference herein)
10.24* | Amendment No. 1 to OGE Energy's Restoration of Retirement Income Plan. (Filed as Exhibit 10.40 to OGE Energy's Form 10-K for the year ended December 31, 2009 (File No. 1-12579) and incorporated by reference herein)
10.25* | Amendment No. 1 to OGE Energy's Deferred Compensation Plan. (Filed as Exhibit 10.33 to OGE Energy's Form 10-K for the year ended December 31, 2011 (File No. 1-12579) and incorporated by reference herein)
10.26 | Copy of Settlement Agreement with Oklahoma Corporation Commission Staff, the Oklahoma Attorney General and others relating to OG&E's Smart Grid application. (Filed as Exhibit 99.02 to OGE Energy's Form 8-K filed June 1, 2010 (File No. 1-12579) and incorporated by reference herein)
10.27 | Copy of Settlement Agreement with Oklahoma Corporation Commission Staff, the Oklahoma Attorney General and others relating to OG&E's Crossroads wind farm application. (Filed as Exhibit 99.01 to OGE Energy's Form 8-K filed July 1, 2010 (File No. 1-12579) and incorporated by reference herein)

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10.28 | Copy of Settlement Agreement with Arkansas Public Service Commission Staff, the Arkansas Attorney General and others relating to OG&E's rate case. (Filed as Exhibit 99.01 to OGE Energy's Form 8-K filed May 19, 2011 (File No. 1-12579) and incorporated by reference herein)
10.29 | Copy of Settlement Agreement with Arkansas Public Service Commission Staff, the Arkansas Attorney General and others relating to OG&E's Smart Grid application. (Filed as Exhibit 99.01 to OGE Energy's Form 8-K filed June 28, 2011 (File No. 1-12579) and incorporated by reference herein)
10.30* | Amendment No. 2 to OGE Energy's Deferred Compensation Plan. (Filed as Exhibit 10.41 to OGE Energy's Form 10-K for the year ended December 31, 2009 (File No. 1-12579) and incorporated by reference herein)
10.31* | Amendment No. 3 to OGE Energy's Deferred Compensation Plan. (Filed as Exhibit 10.39 to OGE Energy's Form 10-K for the year ended December 31, 2011 (File No. 1-12579) and incorporated by reference herein)
10.32* | Amendment No. 1 to OGE Energy's 2008 Stock Incentive Plan. (Filed as Exhibit 10.40 to OGE Energy's Form 10-K for the year ended December 31, 2011 (File No. 1-12579) and incorporated by reference herein)
10.33* | Director Compensation.
10.34* | Executive Officer Compensation.
10.35 | First Amended and Restated Agreement of Limited Partnership of CenterPoint Energy Field Services LP dated as of May 1, 2013 (Filed as Exhibit 10.01 to OGE Energy's Form 8-K filed May 7, 2013 (File No. 1-12579) and incorporated by reference herein)
10.36 | Amended and Restated Limited Liability Company Agreement of CNP OGE GP LLC dated as of May 1, 2013 (Filed as Exhibit 10.02 to OGE Energy's Form 8-K filed May 7, 2013 (File No. 1-12579) and incorporated by reference herein)
10.37 | Registration Rights Agreement dated as of May 1, 2013 by and among CenterPoint Energy Field Services LP, CenterPoint Energy Resources Corp., OGE Enogex Holdings LLC, and Enogex Holdings LLC (Filed as Exhibit 10.03 to OGE Energy's Form 8-K filed May 7, 2013 (File No. 1-12579) and incorporated by reference herein)
10.38 | Omnibus Agreement dated as of May 1, 2013 among CenterPoint Energy, Inc., OGE Energy Corp., Enogex Holdings LLC and CenterPoint Energy Field Services LP (Filed as Exhibit 10.04 to OGE Energy's Form 8-K filed May 7, 2013 (File No. 1-12579) and incorporated by reference herein)
10.39* | OGE Energy's 2013 Stock Incentive Plan. (Filed as Annex B to OGE Energy's Proxy Statement for the 2013 Annual Meeting of Shareowners (File No. 1-12579) and incorporated by reference herein)
10.40* | OGE Energy's 2013 Annual Incentive Compensation Plan. (Filed as Annex C to OGE Energy's Proxy Statement for the 2013 Annual Meeting of Shareowners (File No. 1-12579) and incorporated by reference herein)
10.41 | Letter of extension dated as of July 29, 2013 for OGE Energy's credit agreement dated as of December 13, 2011, by and between OGE Energy, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC, UBS Securities LLC and Union Bank, N.A., as Co-Documentation Agents (Filed as Exhibit 10.01 to OGE Energy's Form 8-K filed August 2, 2013 (File No. 1-12579) and incorporated by reference herein)
10.42 | Letter of extension dated as of July 29, 2013 for OG&E's credit agreement dated as of December 13,2011, by and between OG&E, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC, UBS Securities LLC and Union Bank, N.A., as Co-Documentation Agents (Filed as Exhibit 10.02 to OGE Energy's Form 8-K filed August 2, 2013 (File No. 1-12579) and incorporated by reference herein)
10.43* | Amendment No. 4 to the OGE Energy's Deferred Compensation Plan (Filed as Exhibit 10.01 to OGE Energy's Form 10-Q filed November 6, 2013 (File No. 1-12579) and incorporated by reference herein)
10.44* | OGE Energy Corp. Involuntary Severance Benefits Plans for Non-Officers (Applicable only to non-officers of Enogex LLC seconded to Enable Midstream Partners, LP or Enable GP, LLC or one of its subsidiaries (Filed as Exhibit 10.02 to OGE Energy's Form 10-Q filed November 6, 2013 (File No. 1-12579) and incorporated by reference herein)
10.45* | OGE Energy Corp. Involuntary Severance Benefits Plans for Officers (Applicable only to officers of Enogex LLC seconded to Enable Midstream Partners, LP or Enable GP, LLC or one of its subsidiaries (Filed as Exhibit 10.03 to OGE Energy's Form 10-Q filed November 6, 2013 (File No. 1-12579) and incorporated by reference herein)
10.46* | Retention Agreement effective as of October 24, 2013, by and between OGE Enogex Holdings, LLC and E. Keith Mitchell (Filed as Exhibit 10.04 to OGE Energy's Form 10-Q filed November 6, 2013 (File No. 1-12579) and incorporated by reference herein)
10.47 | Seconded Amended and Restated Limited Liability Company Agreement of Enable GP, LLC as amended as of April 16, 2014 (Filed as exhibit 10.01 to OGE Energy's Form 8-K filed April 22, 2014 (File No. 1-12579) and incorporated by reference herein)
10.48 | Second Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP dated April 16, 2014 (Filed as Exhibit 3.1 to Enable Midstream Partners, LP Form 8-K (File No. 1-36413) and incorporated by reference herein)

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10.49 | Letter of extension dated as of June 24, 2014 for OGE Energy's credit agreement dated as of December 13, 2011, by and between OGE Energy, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC and Union Bank, N.A., as Co-Documentation Agents (Filed as Exhibit 10.01 to OGE Energy's Form 8-K filed June 25, 2014 (File No. 1-12579) and incorporated by reference herein)
10.50 | Letter of extension dated as of June 24, 2014 for OG&E's credit agreement dated as of December 13,2011, by and between OG&E, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC and Union Bank, N.A., as Co-Documentation Agents (Filed as Exhibit 10.02 to OGE Energy's Form 8-K filed June 25, 2014 (File No. 1-12579) and incorporated by reference herein)
10.51 | Letter of extension dated as of September 8, 2014 for OGE Energy's credit agreement dated as of December 13, 2011, by and between OGE Energy, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent (Filed as Exhibit 10.01 to OGE Energy's Form 10-Q filed November 5, 2014 (File No. 1-12579) and incorporated by reference herein)
10.52 | Letter of extension dated as of June 24, 2014 for OG&E's credit agreement dated as of December 13,2011, by and between OG&E, the Lenders thereto, Wells Fargo Bank, National Association, as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Mizuho Corporate Bank, Ltd., The Royal Bank of Scotland PLC and Union Bank, N.A., as Co-Documentation Agents (Filed as Exhibit 10.02 to OGE Energy's Form 8-K filed June 25, 2014 (File No. 1-12579) and incorporated by reference herein)
10.53* | Form of Performance Unit Agreement under OGE Energy's 2013 Stock Incentive Plan.
10.54* | Form of Restricted Stock Agreement under OGE Energy's 2013 Stock Incentive Plan.
12.01 | Calculation of Ratio of Earnings to Fixed Charges.
21.01 | Subsidiaries of the Registrant.
23.01 | Consent of Ernst & Young LLP.
23.02 | Consent of Deloitte & Touche LLP for the Financial Statements of Enable Midstream Partners, LP.
24.01 | Power of Attorney.
31.01 | Certifications Pursuant to Rule 13a-14(a)/15d-14(a) As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.01 | Certification Pursuant to 18 U.S.C. Section 1350 As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
99.01 | Cautionary Statement for Purposes of the "Safe Harbor" Provisions of the Private Securities Litigation Reform Act of 1995.
99.02 | Copy of APSC order with Arkansas Public Service Commission Staff, the Arkansas Attorney General and others relating to OG&E's rate case. (Filed as Exhibit 99.02 to OGE Energy's Form 8-K filed June 22, 2011 (File No. 1-12579) and incorporated by reference herein)
99.03 | Copy of OCC Order with Oklahoma Corporation Commission Staff, the Oklahoma Attorney General and others relating to OG&E's Smart Grid application. (Filed as Exhibit 99.02 to OGE Energy's Form 8-K filed July 7, 2010 (File No. 1-12579) and incorporated by reference herein)
99.04 | Copy of OCC Order with Oklahoma Corporation Commission Staff, the Oklahoma Attorney General and others relating to OG&E's Crossroads wind farm application. (Filed as Exhibit 99.04 to OGE Energy's Form 10-Q for the quarter ended June 30, 2010 (File No. 1-12579) and incorporated by reference herein)
99.05 | Description of Capital Stock. (Filed as Exhibit 99.01 to OGE Energy's Form 10-Q for the quarter ended June 30, 2013 (File No. 1-12579) and incorporated by reference herein)
99.06 | Financial Statements of Enable Midstream Partners, LP as of and for the three years ended December 31, 2014
99.07 | Financial Statements of Enable Midstream Partners, LP as of and for the three years ended December 31, 2013 (Filed as Exhibit 99.01 to OGE Energy's 8-K filed November 12, 2014 (File No. 1-12579) and incorporated by reference herein)
101.INS | XBRL Instance Document.
101.SCH | XBRL Taxonomy Schema Document.
101.PRE | XBRL Taxonomy Presentation Linkbase Document.
101.LAB | XBRL Taxonomy Label Linkbase Document.
101.CAL | XBRL Taxonomy Calculation Linkbase Document.
101.DEF | XBRL Definition Linkbase Document.
* Represents executive compensation plans and arrangements.

137

OGE ENERGY CORP.
SCHEDULE II - Valuation and Qualifying Accounts

|  | Additions |  |
Description | Balance at Beginning of Period | Charged to Costs and Expenses | Deductions (A) | Balance at End of Period
(In millions)
Balance at December 31, 2012 |  |  |  |
Reserve for Uncollectible Accounts | $ | 3.8 |  | $ | 3.3 |  | $ | 4.5 |  | $ | 2.6 |
Balance at December 31, 2013 |  |  |  |
Reserve for Uncollectible Accounts | $ | 2.6 |  | $ | 2.5 |  | $ | 3.2 |  | $ | 1.9 |
Balance at December 31, 2014 |  |  |  |
Reserve for Uncollectible Accounts | $ | 1.9 |  | $ | 2.3 |  | $ | 2.6 |  | $ | 1.6 |

(A) | Uncollectible accounts receivable written off, net of recoveries.

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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Oklahoma City, and State of Oklahoma on the 26 th day of February, 2015.

| OGE ENERGY CORP. |
| (Registrant) |
| By /s/ | Peter B. Delaney |
|  | Peter B. Delaney |
|  | Chairman of the Board, President |
|  | and Chief Executive Officer |

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

Signature |  | Title | Date
/s/ Peter B. Delaney |  |  |
Peter B. Delaney |  | Principal Executive |
|  | Officer and Director; | February 26, 2015
/s/ Stephen Merrill |  |  |
Stephen Merrill |  | Principal Financial Officer; | February 26, 2015
/s/ Scott Forbes |  |  |
Scott Forbes |  | Principal Accounting Officer. | February 26, 2015
James H. Brandi |  | Director; |
Wayne H. Brunetti |  | Director; |
Luke R. Corbett |  | Director; |
John D. Groendyke |  | Director; |
Kirk Humphreys |  | Director; |
Robert Kelley |  | Director; |
Robert O. Lorenz |  | Director; |
Judy R. McReynolds |  | Director; |
Sheila G. Talton |  | Director; |

/s/ Peter B. Delaney |  |  |
By Peter B. Delaney (attorney-in-fact) |  |  | February 26, 2015

139