10-Q 1 ni-2017331x10q.htm 10-Q
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2017
or
¨ 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 001-16189
NiSource Inc.
(Exact name of registrant as specified in its charter)

Delaware |  | 35-2108964
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)
801 East 86th Avenue Merrillville, Indiana |  | 46410
(Address of principal executive offices) |  | (Zip Code)

(877) 647-5990
(Registrant’s telephone number, including area code)
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.
Yes þ 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.)
Yes þ No ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer" "smaller reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer þ Accelerated filer ¨ Emerging growth company ¨
Non-accelerated filer ¨ Smaller reporting company ¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes ¨ No þ
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date: Common Stock, $0.01 Par Value: 324,667,071 shares outstanding at April 24, 2017.

NISOURCE INC.
FORM 10-Q QUARTERLY REPORT
FOR THE QUARTER ENDED MARCH 31, 2017
Table of Contents

|  |  | Page
| Defined Terms | 3
PART I | FINANCIAL INFORMATION |
| Item 1. | Financial Statements - unaudited |
|  | Condensed Statements of Consolidated Income (unaudited) | 6
|  | Condensed Statements of Consolidated Comprehensive Income (unaudited) | 7
|  | Condensed Consolidated Balance Sheets (unaudited) | 8
|  | Condensed Statements of Consolidated Cash Flows (unaudited) | 10
|  | Condensed Statements of Consolidated Equity (unaudited) | 11
|  | Notes to Condensed Consolidated Financial Statements (unaudited) | 12
| Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 28
| Item 3. | Quantitative and Qualitative Disclosures About Market Risk | 41
| Item 4. | Controls and Procedures | 41
PART II | OTHER INFORMATION |
| Item 1. | Legal Proceedings | 42
| Item 1A. | Risk Factors | 42
| Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 42
| Item 3. | Defaults Upon Senior Securities | 42
| Item 4. | Mine Safety Disclosures | 42
| Item 5. | Other Information | 42
| Item 6. | Exhibits | 43
| Signature | 44

2

DEFINED TERMS
The following is a list of frequently used abbreviations or acronyms that are found in this report:
NiSource Subsidiaries, Affiliates and Former Subsidiaries
Capital Markets | NiSource Capital Markets, Inc.
Columbia of Kentucky | Columbia Gas of Kentucky, Inc.
Columbia of Maryland | Columbia Gas of Maryland, Inc.
Columbia of Massachusetts | Bay State Gas Company
Columbia of Ohio | Columbia Gas of Ohio, Inc.
Columbia of Pennsylvania | Columbia Gas of Pennsylvania, Inc.
Columbia of Virginia | Columbia Gas of Virginia, Inc.
NIPSCO | Northern Indiana Public Service Company
NiSource or the Company | NiSource Inc.
NiSource Finance | NiSource Finance Corp.
Abbreviations and Other |
AFUDC | Allowance for funds used during construction
AOCI | Accumulated Other Comprehensive Income (Loss)
ASU | Accounting Standards Update
CAA | Clean Air Act
CCRs | Coal Combustion Residuals
CERCLA | Comprehensive Environmental Response Compensation and Liability Act (also known as Superfund)
CIAC | Contributions In Aid of Construction
CO 2 | Carbon Dioxide
CPP | Clean Power Plan
DPU | Department of Public Utilities
DSM | Demand Side Management
ECR | Environmental Cost Recovery
ECT | Environmental Cost Tracker
EFV | Excess flow valve
EGUs | Electric Utility Generating Units
ELG | Effluent limitations guidelines
EPA | United States Environmental Protection Agency
EPS | Earnings per share
FAC | Fuel adjustment clause
FASB | Financial Accounting Standards Board
FERC | Federal Energy Regulatory Commission
GAAP | Generally Accepted Accounting Principles
GCR | Gas cost recovery
GHG | Greenhouse gases
GSEP | Gas System Enhancement Program
gwh | Gigawatt hours
IBM | International Business Machines Corporation
IRP | Infrastructure Replacement Program
IURC | Indiana Utility Regulatory Commission
LDCs | Local distribution companies

3

DEFINED TERMS
LIFO | Last in, first out
MGP | Manufactured Gas Plant
MISO | Midcontinent Independent System Operator
MMDth | Million dekatherms
MPSC | Maryland Public Service Commission
NAAQS | National Ambient Air Quality Standards
NOL | Net operating loss
NYMEX | New York Mercantile Exchange
OPEB | Other Postretirement Benefits
PHMSA | U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration
Pure Air | Pure Air on the Lake LP
RCRA | Resource Conservation and Recovery Act
ppb | Parts per billion
PUCO | Public Utilities Commission of Ohio
SEC | Securities and Exchange Commission
TDSIC | Transmission, Distribution and Storage System Improvement Charge
TUAs | Transmission Upgrade Agreements
VIE | Variable Interest Entities
VSCC | Virginia State Corporation Commission

Note regarding forward-looking statements
This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act") and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Investors and prospective investors should understand that many factors govern whether any forward-looking statement contained herein will be or can be realized. Any one of those factors could cause actual results to differ materially from those projected. These forward-looking statements include, but are not limited to, statements concerning NiSource’s plans, strategies, objectives, expected performance, expenditures, recovery of expenditures through rates, stated on either a consolidated or segment basis, and any and all underlying assumptions and other statements that are other than statements of historical fact. All forward-looking statements are based on assumptions that management believes to be reasonable; however, there can be no assurance that actual results will not differ materially.
Factors that could cause actual results to differ materially from the projections, forecasts, estimates and expectations discussed in this Quarterly Report on Form 10-Q include, among other things, NiSource’s debt obligations; any changes in NiSource’s credit rating; NiSource’s ability to execute its growth strategy; changes in general economic, capital and commodity market conditions; pension funding obligations; economic regulation and the impact of regulatory rate reviews; NiSource's ability to obtain expected financial or regulatory outcomes; any damage to NiSource's reputation; compliance with environmental laws and the costs of associated liabilities; fluctuations in demand from residential and commercial customers; economic conditions of certain industries; the success of NIPSCO's electric generation strategy; the price of energy commodities and related transportation costs; the reliability of customers and suppliers to fulfill their payment and contractual obligations; potential impairments of goodwill or definite-lived intangible assets; changes in taxation and accounting principles; potential incidents and other operating risks associated with our business; the impact of an aging infrastructure; the impact of climate change; potential cyber-attacks; construction risks and natural gas costs and supply risks; extreme weather conditions; the attraction and retention of a qualified workforce; advances in technology; the ability of NiSource's subsidiaries to generate cash; uncertainties related to the expected benefits of NiSource's separation from Columbia Pipeline Group, Inc. on July 1, 2015, and other matters set forth in the “Risk Factors” section of NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016, many of which risks are beyond the control of NiSource. In addition, the relative contributions to profitability by each business segment, and the assumptions underlying the forward-looking statements relating thereto, may change over time.
All forward-looking statements are expressly qualified in their entirety by the foregoing cautionary statements. NiSource undertakes no obligation to, and expressly disclaims any such obligation to, update or revise any forward-looking statements to reflect changed assumptions, the occurrence of anticipated or unanticipated events or changes to the future results over time or otherwise, except as required by law.
4

Index | Page
Condensed Statements of Consolidated Income (unaudited) | 6
Condensed Statements of Consolidated Comprehensive Income (unaudited) | 7
Condensed Consolidated Balance Sheets (unaudited) | 8
Condensed Statements of Consolidated Cash Flows (unaudited) | 10
Condensed Statements of Consolidated Equity (unaudited) | 11
Notes to Condensed Consolidated Financial Statements (unaudited) | 12
1. Basis of Accounting Presentation | 12
2. Recent Accounting Pronouncements | 12
3. Earnings Per Share | 14
4. Gas in Storage | 14
5. Regulatory Matters | 14
6. Risk Management Activities | 16
7. Fair Value | 18
8. Transfers of Financial Assets | 20
9. Goodwill | 20
10. Income Taxes | 21
11. Pension and Other Postretirement Benefits | 21
12. Long-Term Debt | 21
13. Short-Term Borrowings | 22
14. Other Commitments and Contingencies | 22
15. Accumulated Other Comprehensive Loss | 26
16. Business Segment Information | 26

5

Table of Contents
PART I
ITEM 1. FINANCIAL STATEMENTS
NiSource Inc.
Condensed Statements of Consolidated Income (unaudited)

| Three Months Ended March 31,
(in millions, except per share amounts) | 2017 |  | 2016
Net Revenues |  |
Gas Distribution | $ | 836.5 |  |  | $ | 737.8 |
Gas Transportation | 338.6 |  |  | 301.7 |
Electric | 421.7 |  |  | 392.2 |
Other | 1.8 |  |  | 4.9 |
Gross Revenues | 1,598.6 |  |  | 1,436.6 |
Cost of Sales (excluding depreciation and amortization) | 552.3 |  |  | 496.5 |
Total Net Revenues | 1,046.3 |  |  | 940.1 |
Operating Expenses |  |  |
Operation and maintenance | 410.5 |  |  | 354.7 |
Depreciation and amortization | 143.3 |  |  | 132.8 |
Gain on sale of assets and impairments, net | — |  |  | (0.1 | )
Other taxes | 76.0 |  |  | 71.3 |
Total Operating Expenses | 629.8 |  |  | 558.7 |
Operating Income | 416.5 |  |  | 381.4 |
Other Income (Deductions) |  |  |
Interest expense, net | (85.2 | ) |  | (90.5 | )
Other, net | 1.2 |  |  | 0.7 |
Total Other Deductions, Net | (84.0 | ) |  | (89.8 | )
Net Income before Income Taxes | 332.5 |  |  | 291.6 |
Income Taxes | 121.2 |  |  | 105.0 |
Net Income | 211.3 |  |  | 186.6 |
Earnings Per Share |  |  |
Basic Earnings Per Share | $ | 0.65 |  |  | $ | 0.58 |
Diluted Earnings Per Share | $ | 0.65 |  |  | $ | 0.58 |
Dividends Declared Per Common Share | $ | 0.35 |  |  | $ | 0.31 |
Basic Average Common Shares Outstanding | 323.7 |  |  | 320.3 |
Diluted Average Common Shares | 325.3 |  |  | 322.5 |

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
6

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Condensed Statements of Consolidated Comprehensive Income (unaudited)

| Three Months Ended March 31,
(in millions, net of taxes) | 2017 |  | 2016
Net Income | $ | 211.3 |  |  | $ | 186.6 |
Other comprehensive income (loss): |  |  |
Net unrealized gain on available-for-sale securities(1) | 0.4 |  |  | 1.7 |
Net unrealized gain (loss) on cash flow hedges(2) | 4.9 |  |  | (70.7 | )
Unrecognized pension and OPEB benefit(3) | 0.2 |  |  | 0.3 |
Total other comprehensive income (loss) | 5.5 |  |  | (68.7 | )
Comprehensive Income | $ | 216.8 |  |  | $ | 117.9 |

(1) Net unrealized gain on available-for-sale securities, net of $0.2 million and $0.9 million tax expense in the first quarter of 2017 and 2016, respectively.
(2) Net unrealized gain (loss) on derivatives qualifying as cash flow hedges, net of $3.0 million tax expense and $43.6 million tax benefit in the first quarter of 2017 and 2016, respectively.
(3) Unrecognized pension and OPEB benefit, net of $0.1 million tax expense in the first quarter of 2017 and 2016, respectively.
The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
7

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)

NiSource Inc. Condensed Consolidated Balance Sheets (unaudited)
(in millions) | March 31, 2017 |  | December 31, 2016
ASSETS |  |  |
Property, Plant and Equipment |  |  |
Utility plant | $ | 19,680.6 |  |  | $ | 19,368.0 |
Accumulated depreciation and amortization | (6,701.5 | ) |  | (6,613.7 | )
Net utility plant | 12,979.1 |  |  | 12,754.3 |
Other property, at cost, less accumulated depreciation | 309.8 |  |  | 313.7 |
Net Property, Plant and Equipment | 13,288.9 |  |  | 13,068.0 |
Investments and Other Assets |  |  |
Unconsolidated affiliates | 6.5 |  |  | 6.6 |
Other investments | 194.1 |  |  | 193.3 |
Total Investments and Other Assets | 200.6 |  |  | 199.9 |
Current Assets |  |  |
Cash and cash equivalents | 28.4 |  |  | 26.4 |
Restricted cash | 10.8 |  |  | 9.6 |
Accounts receivable (less reserve of $32.3 and $23.3, respectively) | 813.8 |  |  | 847.0 |
Gas inventory | 79.5 |  |  | 279.9 |
Materials and supplies, at average cost | 97.5 |  |  | 101.7 |
Electric production fuel, at average cost | 98.5 |  |  | 112.8 |
Exchange gas receivable | 18.8 |  |  | 5.4 |
Regulatory assets | 184.8 |  |  | 248.7 |
Prepayments and other | 139.1 |  |  | 130.6 |
Total Current Assets | 1,471.2 |  |  | 1,762.1 |
Other Assets |  |  |
Regulatory assets | 1,657.7 |  |  | 1,636.7 |
Goodwill | 1,690.7 |  |  | 1,690.7 |
Intangible assets | 239.9 |  |  | 242.7 |
Deferred charges and other | 86.9 |  |  | 91.8 |
Total Other Assets | 3,675.2 |  |  | 3,661.9 |
Total Assets | $ | 18,635.9 |  |  | $ | 18,691.9 |

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
8

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)

NiSource Inc. Condensed Consolidated Balance Sheets (unaudited) (continued)
(in millions, except share amounts) | March 31, 2017 |  | December 31, 2016
CAPITALIZATION AND LIABILITIES |  |  |
Capitalization |  |  |
Common Stockholders’ Equity |  |  |
Common stock - $0.01 par value, 400,000,000 shares authorized; 324,474,051 and 323,159,672 shares outstanding, respectively | $ | 3.3 |  |  | $ | 3.3 |
Treasury stock | (93.1 | ) |  | (88.7 | )
Additional paid-in capital | 5,174.7 |  |  | 5,153.9 |
Retained deficit | (874.2 | ) |  | (972.2 | )
Accumulated other comprehensive loss | (19.6 | ) |  | (25.1 | )
Total Common Stockholders’ Equity | 4,191.1 |  |  | 4,071.2 |
Long-term debt, excluding amounts due within one year | 5,590.7 |  |  | 6,058.2 |
Total Capitalization | 9,781.8 |  |  | 10,129.4 |
Current Liabilities |  |  |
Current portion of long-term debt | 809.3 |  |  | 363.1 |
Short-term borrowings | 1,514.2 |  |  | 1,488.0 |
Accounts payable | 461.6 |  |  | 539.4 |
Dividends payable | 56.7 |  |  | — |
Customer deposits and credits | 166.3 |  |  | 264.1 |
Taxes accrued | 216.6 |  |  | 195.4 |
Interest accrued | 67.5 |  |  | 120.3 |
Exchange gas payable | 23.3 |  |  | 83.7 |
Regulatory liabilities | 131.6 |  |  | 116.7 |
Legal and environmental | 33.8 |  |  | 37.4 |
Accrued compensation and employee benefits | 107.0 |  |  | 161.4 |
Other accruals | 76.2 |  |  | 82.7 |
Total Current Liabilities | 3,664.1 |  |  | 3,452.2 |
Other Liabilities |  |  |
Risk management liabilities | 52.9 |  |  | 44.5 |
Deferred income taxes | 2,644.3 |  |  | 2,528.0 |
Deferred investment tax credits | 13.1 |  |  | 13.4 |
Accrued insurance liabilities | 85.1 |  |  | 82.8 |
Accrued liability for postretirement and postemployment benefits | 700.0 |  |  | 713.4 |
Regulatory liabilities | 1,234.1 |  |  | 1,265.1 |
Asset retirement obligations | 261.3 |  |  | 262.6 |
Other noncurrent liabilities | 199.2 |  |  | 200.5 |
Total Other Liabilities | 5,190.0 |  |  | 5,110.3 |
Commitments and Contingencies (Refer to Note 14, "Other Commitments and Contingencies") | — |  |  | — |
Total Capitalization and Liabilities | $ | 18,635.9 |  |  | $ | 18,691.9 |

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
9

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)

NiSource Inc. Condensed Statements of Consolidated Cash Flows (unaudited)
Three Months Ended March 31, (in millions) | 2017 |  | 2016
Operating Activities |  |  |
Net Income | $ | 211.3 |  |  | $ | 186.6 |
Adjustments to Reconcile Net Income to Net Cash from Continuing Operations: |  |  |
Depreciation and amortization | 143.3 |  |  | 132.8 |
Deferred income taxes and investment tax credits | 109.4 |  |  | 95.1 |
Other adjustments | 11.0 |  |  | 10.0 |
Changes in Assets and Liabilities: |  |  |
Components of working capital | (117.5 | ) |  | (37.9 | )
Regulatory assets/liabilities | 69.3 |  |  | (81.3 | )
Other noncurrent assets | (1.2 | ) |  | 0.2 |
Other noncurrent liabilities | (14.5 | ) |  | (2.3 | )
Net Operating Activities from Continuing Operations | 411.1 |  |  | 303.2 |
Net Operating Activities used for Discontinued Operations | — |  |  | (0.3 | )
Net Cash Flows from Operating Activities | 411.1 |  |  | 302.9 |
Investing Activities |  |  |
Capital expenditures | (312.0 | ) |  | (301.0 | )
Cost of removal | (31.4 | ) |  | (21.6 | )
Other investing activities | (0.8 | ) |  | 7.3 |
Net Cash Flows used for Investing Activities | (344.2 | ) |  | (315.3 | )
Financing Activities |  |  |
Repayments of long-term debt and capital lease obligations | (36.6 | ) |  | (204.3 | )
Premiums and other debt related costs | — |  |  | (0.3 | )
Change in short-term borrowings, net | 26.2 |  |  | 277.9 |
Issuance of common stock | 6.4 |  |  | 4.3 |
Acquisition of treasury stock | (4.4 | ) |  | (7.4 | )
Dividends paid - common stock | (56.5 | ) |  | (49.6 | )
Net Cash Flows from (used for) Financing Activities | (64.9 | ) |  | 20.6 |
Change in cash and cash equivalents from continuing operations | 2.0 |  |  | 8.5 |
Change in cash and cash equivalents used for discontinued operations | — |  |  | (0.3 | )
Cash and cash equivalents at beginning of period | 26.4 |  |  | 15.5 |
Cash and Cash Equivalents at End of Period | $ | 28.4 |  |  | $ | 23.7 |

Supplemental Disclosures of Cash Flow Information

Three Months Ended March 31, (in millions) | 2017 |  | 2016
Non-cash transactions: |  |  |
Capital expenditures included in current liabilities | $ | 133.9 |  |  | $ | 108.9 |

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
10

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Condensed Statements of Consolidated Equity (unaudited)

(in millions) | Common Stock |  | Treasury Stock |  | Additional Paid-In Capital |  | Retained Deficit |  | Accumulated Other Comprehensive Loss |  | Total
Balance as of January 1, 2017 | $ | 3.3 |  |  | $ | (88.7 | ) |  | $ | 5,153.9 |  |  | $ | (972.2 | ) |  | $ | (25.1 | ) |  | $ | 4,071.2 |
Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |
Net Income | — |  |  | — |  |  | — |  |  | 211.3 |  |  | — |  |  | 211.3 |
Other comprehensive income, net of tax | — |  |  | — |  |  | — |  |  | — |  |  | 5.5 |  |  | 5.5 |
Common stock dividends ($0.35 per share) | — |  |  | — |  |  | — |  |  | (113.3 | ) |  | — |  |  | (113.3 | )
Treasury stock acquired | — |  |  | (4.4 | ) |  | — |  |  | — |  |  | — |  |  | (4.4 | )
Stock issuances: |  |  |  |  |  |  |  |  |  |  |
Employee stock purchase plan | — |  |  | — |  |  | 1.1 |  |  | — |  |  | — |  |  | 1.1 |
Long-term incentive plan | — |  |  | — |  |  | 3.9 |  |  | — |  |  | — |  |  | 3.9 |
401(k) and profit sharing | — |  |  | — |  |  | 13.3 |  |  | — |  |  | — |  |  | 13.3 |
Dividend reinvestment plan | — |  |  | — |  |  | 2.5 |  |  | — |  |  | — |  |  | 2.5 |
Balance as of March 31, 2017 | $ | 3.3 |  |  | $ | (93.1 | ) |  | $ | 5,174.7 |  |  | $ | (874.2 | ) |  | $ | (19.6 | ) |  | $ | 4,191.1 |

Shares (in thousands) | Common Shares |  | Treasury Shares |  | Outstanding Shares
Balance as of January 1, 2017 | 326,664 |  |  | (3,504 | ) |  | 323,160 |
Treasury Stock acquired |  |  | (184 | ) |  | (184 | )
Issued: |  |  |  |  |
Employee stock purchase plan | 49 |  |  | — |  |  | 49 |
Long-term incentive plan | 763 |  |  | — |  |  | 763 |
401(k) and profit sharing | 577 |  |  | — |  |  | 577 |
Dividend reinvestment plan | 109 |  |  | — |  |  | 109 |
Balance as of March 31, 2017 | 328,162 |  |  | (3,688 | ) |  | 324,474 |

The accompanying Notes to Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.
11

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited)
1. Basis of Accounting Presentation
The accompanying Condensed Consolidated Financial Statements (unaudited) for NiSource Inc. ("NiSource" or the “Company”) reflect all normal recurring adjustments that are necessary, in the opinion of management, to present fairly the results of operations in accordance with GAAP in the United States of America. The accompanying financial statements contain the accounts of the Company and its majority-owned or controlled subsidiaries.
The accompanying financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016. Income for interim periods may not be indicative of results for the calendar year due to weather variations and other factors.
The Condensed Consolidated Financial Statements (unaudited) have been prepared pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although NiSource believes that the disclosures made in this quarterly report on Form 10-Q are adequate to make the information herein not misleading.
2. Recent Accounting Pronouncements
Recently Issued Accounting Pronouncements
NiSource is currently evaluating the impact of certain ASUs on its Condensed Consolidated Financial Statements (unaudited) or Notes to Condensed Consolidated Financial Statements (unaudited), which are described below:

Standard | Description | Effective Date | Effect on the financial statements or other significant matters
ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost | The pronouncement changes how defined benefit pension and other postretirement benefit plans present net periodic benefit cost. The service cost component of net periodic benefit cost will be included with other employee compensation costs whereas other components of the net periodic benefit cost will be disclosed separately outside of income from operations in the income statement. Additionally, only the service cost component of net periodic benefit cost will be eligible for capitalization. | Annual periods beginning after December 15, 2017, including interim periods therein. Early adoption is permitted. | NiSource is currently evaluating the impact of adoption on the Condensed Consolidated Financial Statements (unaudited) and Notes to Condensed Consolidated Financial Statements (unaudited).

12

Table of Contents
ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)

Standard | Description | Effective Date | Effect on the financial statements or other significant matters
ASU 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients | The pronouncement clarifies implementation guidance in ASU 2014-09 on assessing collectability, noncash consideration and the presentation of sales and other similar taxes collected from customers. | Annual periods beginning after December 15, 2017, including interim periods therein. Early adoption is permitted for annual or interim periods beginning after December 15, 2016. | NiSource has formed an internal stakeholder group to promote information sharing and communication of the new requirements. Additionally, NiSource participates in an informal forum of industry peers where questions can be asked and interpretations of the new standard can be shared. Recently, involvement in this group has resulted in additional clarity on industry-specific issues such as treatment of CIAC, scoping of tariff arrangements and presentation of alternative revenue programs. This clarity will help to further NiSource's adoption efforts. NiSource has separated its various revenue streams into high-level categories, which serve as the basis for accounting analysis and documentation as it relates to the pronouncement's impact on NiSource's revenues. Substantially all of NiSource’s revenues are tariff based, which NiSource concluded will be in scope of ASC 606. NiSource has also undertaken efforts to outline mock footnote disclosures intended to satisfy ASC 606's disclosure requirements. NiSource expects to adopt this ASU effective January 1, 2018. As of March 31, 2017, NiSource has not concluded on a method of adoption.
ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations | The pronouncement clarifies the principal versus agent guidance in ASU 2014-09. The amendment clarifies how an entity should identify the unit of accounting for the principal versus agent evaluation, and how it should apply the control principle to certain types of arrangements.
ASU 2014-09, Revenue from Contracts with Customers (Topic 606) | The pronouncement outlines a single, comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. The core principle of the new standard is that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.
ASU 2016-02, Leases (Topic 842) | The pronouncement introduces a lessee model that brings most leases on the balance sheet. The standard requires that lessees recognize the following for all leases (with the exception of short-term leases, as that term is defined in the standard) at the lease commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. | Annual periods beginning after December 15, 2018, including interim periods therein. Early adoption is permitted. | NiSource has formed an internal stakeholder group that meets periodically to share information and gather data related to leasing activity at NiSource. This includes compiling a list of all contracts that could meet the definition of a lease under the new standard and evaluating the accounting for these contracts under the new standard to determine the ultimate impact the new standard will have on NiSource’s financial statements. Also this procedure has identified process improvements to ensure data from newly initiated leases is captured to comply with the new standard. This work included the assistance of a third-party advisory firm. As of March 31, 2017, no conclusion has been reached as to when NiSource will adopt this standard.

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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
Recently Adopted Accounting Pronouncements

Standard | Adoption
ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment | NiSource elected to adopt this ASU effective January 1, 2017. The adoption of this standard did not have a material impact on the Condensed Consolidated Financial Statements (unaudited) or Notes to Condensed Consolidated Financial Statements (unaudited).
ASU 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting | NiSource elected to adopt this pronouncement during the third quarter of 2016. Upon adoption, NiSource elected to begin accounting for forfeitures of share-based awards as they occur. The impact of this change was not material. Additionally, NiSource recorded a $25.3 million credit to beginning retained deficit. This adjustment represents excess tax benefits generated in years prior to 2016 that were previously not recognized in stockholders' equity due to NOLs in those years. Both of these adjustments were adopted on a modified retrospective basis. Lastly, NiSource recorded income tax benefits of $7.2 million related to excess tax benefits generated in 2016. This provision was adopted on a prospective basis. However, because NiSource adopted the standard during an interim period, the standard required this $7.2 million benefit be reflected as though it was adopted as of January 1, 2016. Quarter-to-date March 31, 2016 and June 30, 2016 earnings per share from continuing operations increased by $0.02 and $0.00, respectively, as a result of the adoption. For additional information, see Note 2, "Recent Accounting Pronouncements" in NiSource's 10-Q for the quarterly period ended September 30, 2016.

3. Earnings Per Share
Basic EPS is computed by dividing net income by the weighted-average number of shares of common stock outstanding for the period. The weighted-average shares outstanding for diluted EPS includes the incremental effects of the various long-term incentive compensation plans. The computation of diluted average common shares is as follows:

| Three Months Ended
| March 31,
(in thousands) | 2017 |  | 2016
Denominator |  |  |
Basic average common shares outstanding | 323,681 |  |  | 320,281 |
Dilutive potential common shares: |  |  |
Shares contingently issuable under employee stock plans | 360 |  |  | 45 |
Shares restricted under employee stock plans | 1,265 |  |  | 2,134 |
Diluted Average Common Shares | 325,306 |  |  | 322,460 |

4. Gas in Storage
Both the LIFO inventory methodology and the weighted-average cost methodology are used by NiSource to value natural gas in storage. Gas Distribution Operations prices natural gas storage injections at the average of the costs of natural gas supply purchased during the year. For interim periods, the difference between current projected replacement cost and the LIFO cost for quantities of gas temporarily withdrawn from storage is recorded as a temporary LIFO liquidation credit or debit within the Condensed Consolidated Balance Sheets (unaudited). Due to seasonality requirements, NiSource expects interim variances in LIFO layers to be replenished by year end. NiSource had a temporary LIFO liquidation debit of $20.6 million and zero as of March 31, 2017 and December 31, 2016, respectively, for certain gas distribution companies recorded within “Prepayments and other,” on the Condensed Consolidated Balance Sheets (unaudited).
5. Regulatory Matters
Gas Distribution Operations Regulatory Matters
Cost Recovery and Trackers. Comparability of Gas Distribution Operations line item operating results is impacted by regulatory trackers that allow for the recovery in rates of certain costs such as those described below. Increases in the expenses that are the
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
subject of trackers result in a corresponding increase in net revenues and therefore have essentially no impact on total operating income results.
Certain operating costs of the NiSource distribution companies are significant, recurring in nature, and generally outside the control of the distribution companies. Some states allow the recovery of such costs through cost tracking mechanisms. Such tracking mechanisms allow for abbreviated regulatory proceedings in order for the distribution companies to implement charges and recover appropriate costs. Tracking mechanisms allow for more timely recovery of such costs as compared with more traditional cost recovery mechanisms. Examples of such mechanisms include GCR adjustment mechanisms, tax riders, and bad debt recovery mechanisms.
A portion of the distribution companies' revenue is related to the recovery of gas costs, the review and recovery of which occurs through standard regulatory proceedings. All states in NiSource's operating area require periodic review of actual gas procurement activity to determine prudence and to permit the recovery of prudently incurred costs related to the supply of gas for customers. NiSource distribution companies have historically been found prudent in the procurement of gas supplies to serve customers.
Certain of the NiSource distribution companies have completed rate proceedings involving infrastructure replacement or are embarking upon regulatory initiatives to replace significant portions of their operating systems that are nearing the end of their useful lives. Each LDC's approach to cost recovery may be unique, given the different laws, regulations and precedent that exist in each jurisdiction.
Columbia of Ohio. On November 28, 2012, the PUCO approved Columbia of Ohio’s application to extend its IRP for an additional five years (2013-2017), allowing Columbia of Ohio to continue to invest and recover on its accelerated main replacements. Columbia of Ohio filed its application to adjust rates associated with its IRP and DSM Riders on February 27, 2017, which requested authority to increase revenues by approximately $31.5 million. On March 23, 2017, the PUCO Staff filed comments which recommended approval of the application with only minor revisions. The PUCO issued an order on April 26, 2017, approving Columbia of Ohio's application. New rates went into effect on May 1, 2017.
On December 27, 2016, Columbia of Ohio filed its Notice of Intent to file an application that will request authority for Columbia of Ohio to extend its IRP for an additional five years (2018-2022). Columbia of Ohio’s application was filed on February 27, 2017. An order is expected by the end of 2017.
NIPSCO Gas. On April 30, 2013, then Indiana Governor Pence signed Senate Enrolled Act 560, the TDSIC statute, into law. Among other provisions, this legislation provides for cost recovery outside of a base rate proceeding for new or replacement electric and gas transmission, distribution, and storage projects that a public utility undertakes for the purposes of safety, reliability, system modernization, or economic development. Provisions of the TDSIC statute require that, among other things, requests for recovery include a seven-year plan of eligible investments. Once the plan is approved by the IURC, eighty percent of eligible costs can be recovered using a periodic rate adjustment mechanism. The cost recovery mechanism is referred to as a TDSIC mechanism. Recoverable costs include a return on, and of, the investment, including AFUDC, post-in-service carrying charges, operation and maintenance expenses, depreciation and property taxes. The remaining twenty percent of recoverable costs are to be deferred for future recovery in the public utility’s next general rate case. The periodic rate adjustment mechanism is capped at an annual increase of no more than two percent of total retail revenues. On December 28, 2016, the IURC issued an order on the seven-year plan (2014-2020) within TDSIC-5 approving NIPSCO’s updated estimate of TDSIC-eligible investments of $824 million. The order also included approval to begin recovery of $211.6 million of cumulative net capital spend through June 30, 2016. New rates went into effect on January 1, 2017. On February 28, 2017, NIPSCO filed TDSIC-6 requesting approval of $271.3 million of cumulative net capital spend through December 31, 2016. An order is expected in June 2017, with new rates effective July 1, 2017.
Columbia of Massachusetts. On July 7, 2014, the Governor of Massachusetts signed into law Chapter 149 of the Acts of 2014, An Act Relative to Natural Gas Leaks (“the Act”). The Act authorizes natural gas distribution companies to file gas infrastructure replacement plans with the Massachusetts DPU to address the replacement of aging natural gas pipeline infrastructure. In addition, the Act provides that the Massachusetts DPU may, after review of the plans, allow the proposed estimated costs of the plan into rates as of May 1 of the subsequent year. On October 31, 2016, Columbia of Massachusetts filed its GSEP for the 2017 construction year. Columbia of Massachusetts is proposing to recover an incremental $8.4 million for a cumulative revenue requirement of $17.2 million. An order was received from the Massachusetts DPU on April 28, 2017, and rates went into effect on May 1, 2017.
Columbia of Virginia. On April 29, 2016, Columbia of Virginia filed a request with the VSCC, seeking an annual revenue increase of $37.0 million. The case was driven by Columbia of Virginia's ongoing capital program to modernize its infrastructure and to expand and upgrade its facilities to meet customer growth, as well as expenditures related to employee training and compliance with pipeline safety regulations. On September 28, 2016, Columbia of Virginia implemented updated interim base rates subject
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
to refund. On January 17, 2017, Columbia of Virginia presented a stipulation and proposed recommendation, representing a settlement by all parties to the proceeding that included a base revenue increase of $28.5 million. On February 8, 2017, the hearing examiner in the case filed a report recommending approval of the stipulation and proposed recommendation. On March 17, 2017, by final order, the VSCC approved the settlement agreement without modification. Under terms of the final order, Columbia of Virginia will refund within 90 days the difference between the interim customer rates implemented in 2016 and the rates approved by the final order.
Columbia of Maryland. On April 14, 2017, Columbia of Maryland filed a request with the MPSC to adjust its base rates so it can continue to expedite the replacement of aging pipe as well as adopt pipeline safety upgrades. If approved as filed, the rate adjustment would result in an annual revenue increase of approximately $6 million. An order is expected by the end of 2017.
Electric Operations Regulatory Matters
Cost Recovery and Trackers. Comparability of Electric Operations line item operating results is impacted by regulatory trackers that allow for the recovery in rates of certain costs such as those described below. Increases in the expenses that are the subject of trackers result in a corresponding increase in net revenues and therefore have essentially no impact on total operating income results.
Certain operating costs of the Electric Operations are significant, recurring in nature, and generally outside the control of NIPSCO. The IURC allows for recovery of such costs through cost tracking mechanisms. Such tracking mechanisms allow for abbreviated regulatory proceedings in order for NIPSCO to implement charges and recover appropriate costs. Tracking mechanisms allow for more timely recovery of such costs as compared with more traditional cost recovery mechanisms. Examples of such mechanisms include electric energy efficiency programs, MISO non-fuel costs and revenues, resource capacity charges, federally mandated costs and environmental related costs.
A portion of NIPSCO's revenue is related to the recovery of fuel costs to generate power and the fuel costs related to purchased power. These costs are recovered through a FAC, a quarterly regulatory proceeding in Indiana.
NIPSCO has approval from the IURC to recover certain environmental related costs through an ECT. Under the ECT, NIPSCO is permitted to recover (1) AFUDC and a return on the capital investment expended by NIPSCO to implement environmental compliance plan projects and (2) related operation and maintenance and depreciation expenses once the environmental facilities become operational. On January 31, 2017, NIPSCO filed ECR-29 which included $261.1 million of net capital expenditures for the period ended December 31, 2016. An order was received from the IURC on April 26, 2017.
NIPSCO made a TDSIC rate adjustment mechanism filing on June 30, 2016 seeking recovery and ratemaking relief associated with $45.5 million of cumulative net capital expenditures invested through April 30, 2016. An IURC order approving NIPSCO's filing was received on January 25, 2017. New rates went into effect with the first billing cycle of February 2017.
On November 1, 2016, NIPSCO filed a petition with the IURC for relief regarding the construction of additional environmental projects required to comply with the final rules for regulation of CCRs and the ELG. An order is expected by the end of 2017. Refer to Note 14-C, “Environmental Matters,” for more information.
6. Risk Management Activities
NiSource is exposed to certain risks relating to its ongoing business operations; namely commodity price risk and interest rate risk. NiSource recognizes that the prudent and selective use of derivatives may help to lower its cost of debt capital, manage its interest rate exposure and limit volatility in the price of natural gas.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
Risk management assets and liabilities on NiSource’s derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below:

(in millions) | March 31, 2017 |  | December 31, 2016
Risk Management Assets - Current(1) |  |  |
Interest rate risk programs | $ | 16.9 |  |  | $ | 17.0 |
Commodity price risk programs | 3.1 |  |  | 7.4 |
Total | $ | 20.0 |  |  | $ | 24.4 |
Risk Management Assets - Noncurrent(2) |  |  |
Interest rate risk programs | $ | 17.0 |  |  | $ | 17.1 |
Commodity price risk programs | 1.9 |  |  | 7.5 |
Total | $ | 18.9 |  |  | $ | 24.6 |
Risk Management Liabilities - Current(3) |  |  |
Interest rate risk programs | $ | 11.5 |  |  | $ | 15.3 |
Commodity price risk programs | 0.9 |  |  | 1.5 |
Total | $ | 12.4 |  |  | $ | 16.8 |
Risk Management Liabilities - Noncurrent |  |  |
Interest rate risk programs | $ | 20.6 |  |  | $ | 24.5 |
Commodity price risk programs | 32.3 |  |  | 20.0 |
Total | $ | 52.9 |  |  | $ | 44.5 |

(1)Presented in "Prepayments and other" on the Condensed Consolidated Balance Sheets (unaudited).
(2)Presented in "Deferred charges and other" on the Condensed Consolidated Balance Sheets (unaudited).
(3)Presented in "Other accruals" on the Condensed Consolidated Balance Sheets (unaudited).
Commodity Price Risk Management
NiSource and NiSource’s utility customers are exposed to variability in cash flows associated with natural gas purchases and volatility in natural gas prices. NiSource purchases natural gas for sale and delivery to its retail, commercial and industrial customers, and for most customers the variability in the market price of gas is passed through in their rates. Some of NiSource’s utility subsidiaries offer programs where variability in the market price of gas is assumed by the respective utility. The objective of NiSource’s commodity price risk programs is to mitigate the gas cost variability, for NiSource or on behalf of its customers, associated with natural gas purchases or sales by economically hedging the various gas cost components using a combination of futures, options, forwards or other derivative contracts.
NIPSCO received IURC approval to lock in a fixed price for its natural gas customers using long-term forward purchase instruments. The term of these instruments may range from five to ten years and is limited to ten percent of NIPSCO’s average annual GCA purchase volume. Gains and losses on these derivative contracts will be deferred as regulatory liabilities or assets and will be remitted to or collected from customers through NIPSCO’s quarterly GCA mechanism. These instruments are not designated as accounting hedges.
Interest Rate Risk Management
As of March 31, 2017, NiSource Finance has forward-starting interest rate swaps with an aggregate notional value totaling $1.5 billion to hedge the variability in cash flows attributable to changes in the benchmark interest rate during the periods from the effective dates of the swaps to the anticipated dates of forecasted debt issuances, which are expected to take place by the end of 2018. These interest rate swaps are designated as cash flow hedges. The effective portions of the gains and losses related to these swaps are recorded to AOCI and are recognized in earnings concurrent with the recognition of interest expense on the associated debt, once issued. If it becomes probable that a hedged forecasted transaction will no longer occur, the accumulated gains or losses on the derivative will be recognized currently in earnings. Earnings may also be impacted if the anticipated dates of forecasted debt issuances differ from the dates of the interest rate swaps.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
Realized gains and losses from NiSource’s interest rate cash flow hedges are presented in “Interest expense, net” on the Condensed Statements of Consolidated Income (unaudited). There was no material income statement recognition of gains or losses relating to an ineffective portion of NiSource's hedges, nor were there amounts excluded from effectiveness testing for derivatives in cash flow hedging relationships at March 31, 2017 and December 31, 2016.
NiSource’s derivative instruments measured at fair value as of March 31, 2017 and December 31, 2016 do not contain any credit-risk-related contingent features.
In April 2017, NiSource Finance entered into additional forward-starting interest rate swaps with an aggregate notional amount of $200.0 million with anticipated dates of forecasted debt issuances through the end of 2017.
7. Fair Value
A. Fair Value Measurements
Recurring Fair Value Measurements. The following tables present financial assets and liabilities measured and recorded at fair value on NiSource’s Condensed Consolidated Balance Sheets (unaudited) on a recurring basis and their level within the fair value hierarchy as of March 31, 2017 and December 31, 2016:

Recurring Fair Value Measurements March 31, 2017 (in millions) | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance as of March 31, 2017
Assets |  |  |  |  |  |  |
Risk management assets | $ | 1.5 |  |  | $ | 37.0 |  |  | $ | 0.4 |  |  | $ | 38.9 |
Available-for-sale securities | — |  |  | 128.2 |  |  | — |  |  | 128.2 |
Total | $ | 1.5 |  |  | $ | 165.2 |  |  | $ | 0.4 |  |  | $ | 167.1 |
Liabilities |  |  |  |  |  |  |
Risk management liabilities | $ | 1.8 |  |  | $ | 63.5 |  |  | $ | — |  |  | $ | 65.3 |
Total | $ | 1.8 |  |  | $ | 63.5 |  |  | $ | — |  |  | $ | 65.3 |

Recurring Fair Value Measurements December 31, 2016 (in millions) | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance as of December 31, 2016
Assets |  |  |  |  |  |  |
Risk management assets | $ | 5.4 |  |  | $ | 43.6 |  |  | $ | — |  |  | $ | 49.0 |
Available-for-sale securities | — |  |  | 131.5 |  |  | — |  |  | 131.5 |
Total | $ | 5.4 |  |  | $ | 175.1 |  |  | $ | — |  |  | $ | 180.5 |
Liabilities |  |  |  |  |  |  |
Risk management liabilities | $ | 1.2 |  |  | $ | 58.9 |  |  | $ | 1.2 |  |  | $ | 61.3 |
Total | $ | 1.2 |  |  | $ | 58.9 |  |  | $ | 1.2 |  |  | $ | 61.3 |

Risk management assets and liabilities include interest rate swaps, exchange-traded NYMEX futures and NYMEX options and non-exchange-based forward purchase contracts. Exchange-traded derivative contracts are based on unadjusted quoted prices in active markets and are classified within Level 1. These financial assets and liabilities are secured with cash on deposit with the exchange; therefore, nonperformance risk has not been incorporated into these valuations. Certain non-exchange-traded derivatives are valued using broker or over-the-counter, on-line exchanges. In such cases, these non-exchange-traded derivatives are classified within Level 2. Non-exchange-based derivative instruments include swaps, forwards and options. In certain instances, these instruments may utilize models to measure fair value. NiSource uses a similar model to value similar instruments. Valuation models utilize various inputs that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, other observable inputs for the asset or liability and market-corroborated
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
inputs, (i.e., inputs derived principally from or corroborated by observable market data by correlation or other means). Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized within Level 2. Certain derivatives trade in less active markets with a lower availability of pricing information and models may be utilized in the valuation. When such inputs have a significant impact on the measurement of fair value, the instrument is categorized within Level 3. Credit risk is considered in the fair value calculation of derivative instruments that are not exchange-traded. Credit exposures are adjusted to reflect collateral agreements which reduce exposures. As of March 31, 2017 and December 31, 2016, there were no material transfers between fair value hierarchies. Additionally, there were no changes in the method or significant assumptions used to estimate the fair value of NiSource’s financial instruments.
NiSource Finance has entered into forward-starting interest rate swaps to hedge the interest rate risk on coupon payments of forecasted issuances of long-term debt. These swaps are designated as cash flow hedges. Credit risk is considered in the fair value calculation of each interest rate swap. As they are based on observable data and valuations of similar instruments, the interest rate swaps are categorized within Level 2 of the fair value hierarchy. There was no exchange of premium at the initial date of the swaps, and NiSource can settle the swaps at any time. For additional information see Note 6, "Risk Management Activities."
Available-for-sale securities are investments pledged as collateral for trust accounts related to NiSource’s wholly-owned insurance company. Available-for-sale securities are included within “Other investments” in the Condensed Consolidated Balance Sheets (unaudited). NiSource values U.S. Treasury, corporate debt and mortgage-backed securities using a matrix pricing model that incorporates market-based information. These securities trade less frequently and are classified within Level 2. Total unrealized gains and losses from available-for-sale securities are included in other comprehensive income (loss).
The amortized cost, gross unrealized gains and losses and fair value of available-for-sale securities at March 31, 2017 and December 31, 2016 were:

March 31, 2017 (in millions) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Available-for-sale securities |  |  |  |  |  |  |
U.S. Treasury debt securities | $ | 33.8 |  |  | $ | — |  |  | $ | (0.1 | ) |  | $ | 33.7 |
Corporate/Other debt securities | 94.8 |  |  | 0.4 |  |  | (0.7 | ) |  | 94.5 |
Total | $ | 128.6 |  |  | $ | 0.4 |  |  | $ | (0.8 | ) |  | $ | 128.2 |
December 31, 2016 (in millions) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Available-for-sale securities |  |  |  |  |  |  |
U.S. Treasury debt securities | $ | 35.0 |  |  | $ | 0.1 |  |  | $ | (0.6 | ) |  | $ | 34.5 |
Corporate/Other debt securities | 98.7 |  |  | 0.3 |  |  | (2.0 | ) |  | 97.0 |
Total | $ | 133.7 |  |  | $ | 0.4 |  |  | $ | (2.6 | ) |  | $ | 131.5 |

For the three months ended March 31, 2017, the net realized loss on the sale of available-for-sale U.S. Treasury debt securities was $0.3 million. For the three months ended March 31, 2017, the net realized gain on the sale of available-for-sale Corporate/Other debt securities was $0.1 million. There were no net realized gains or losses on the sale of available-for-sale securities during the three months ended March 31, 2016.
The cost of maturities sold is based upon specific identification. At March 31, 2017, approximately $11.6 million of U.S. Treasury securities and approximately $5.5 million of Corporate/Other debt securities have maturities of less than a year.
There are no material items in the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for the three months ended March 31, 2017 and 2016.

Non-recurring Fair Value Measurements. There were no significant non-recurring fair value measurements recorded during the three months ended March 31, 2017.
B. Other Fair Value Disclosures for Financial Instruments. The carrying amount of cash and cash equivalents, restricted cash, customer deposits and short-term borrowings is a reasonable estimate of fair value due to their liquid or short-term nature. NiSource’s long-term borrowings are recorded at historical amounts.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
The following method and assumptions were used to estimate the fair value of each class of financial instruments.
Long-term Debt. The fair value of outstanding long-term debt is estimated based on the quoted market prices for the same or similar securities. Certain premium costs associated with the early settlement of long-term debt are not taken into consideration in determining fair value. These fair value measurements are classified within Level 2 of the fair value hierarchy. For the three months ended March 31, 2017 there was no change in the method or significant assumptions used to estimate the fair value of long-term debt.
The carrying amount and estimated fair values of these financial instruments were as follows:

(in millions) | Carrying Amount as of March 31, 2017 |  | Estimated Fair Value as of March 31, 2017 |  | Carrying Amount as of Dec. 31, 2016 |  | Estimated Fair Value as of Dec. 31, 2016
Long-term debt (including current portion) | $ | 6,400.0 |  |  | $ | 7,040.8 |  |  | $ | 6,421.3 |  |  | $ | 7,064.1 |

8. Transfers of Financial Assets
Columbia of Ohio, NIPSCO and Columbia of Pennsylvania each maintain a receivables agreement whereby they sell their customer accounts receivables to third party financial institutions through wholly-owned and consolidated special purpose entities. The three agreements expire between August 2017 and March 2018 and may be further renewed if mutually agreed to by all parties.
All receivables sold to the purchasers are valued at face value, which approximates fair value due to their short-term nature. The amount of the undivided percentage ownership interest in the accounts receivables sold is determined in part by required loss reserves under the agreements.
Transfers of accounts receivable are accounted for as secured borrowings resulting in the recognition of short-term borrowings on the Condensed Consolidated Balance Sheets (unaudited). As of March 31, 2017, the maximum amount of debt that could be recognized related to NiSource’s accounts receivable programs is $490.0 million.
The following table reflects the gross and net receivables transferred as well as short-term borrowings related to the securitization transactions as of March 31, 2017 and December 31, 2016:

(in millions) | March 31, 2017 |  | December 31, 2016
Gross Receivables | $ | 623.0 |  |  | $ | 618.3 |
Less: Receivables not transferred | 184.0 |  |  | 308.3 |
Net receivables transferred | $ | 439.0 |  |  | $ | 310.0 |
Short-term debt due to asset securitization | $ | 439.0 |  |  | $ | 310.0 |

For the three months ended March 31, 2017 and 2016, $129.0 million and $139.3 million was recorded as cash flows from financing activities related to the change in short-term borrowings due to securitization transactions. Fees associated with the securitization transactions were $0.7 million and $1.1 million for the three months ended March 31, 2017 and 2016, respectively. NiSource remains responsible for collecting on the receivables securitized and the receivables cannot be sold to another party.
9. Goodwill
The following presents NiSource’s goodwill balance allocated by segment as of March 31, 2017:

(in millions) |  | Gas Distribution Operations |  | Electric Operations |  | Corporate and Other |  | Total
Goodwill |  | $ | 1,690.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,690.7 |

NiSource completed a quantitative ("step 1") fair value measurement of its reporting units during the May 1, 2016 goodwill test. The test indicated that the fair value of each of the reporting units that are allocated goodwill exceeded their carrying values, indicating that no impairment was necessary.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
10. Income Taxes
NiSource’s interim effective tax rates reflect the estimated annual effective tax rates for 2017 and 2016, adjusted for tax expense associated with certain discrete items. The effective tax rates for the three months ended March 31, 2017 and 2016 were 36.5% and 36.0%, respectively. These effective tax rates differ from the Federal tax rate of 35% primarily due to the effects of tax credits, state income taxes, utility ratemaking, and other permanent book-to-tax differences.
The increase in the three month effective tax rate of 0.5% in 2017 versus the same period in 2016 is primarily due to changes in excess tax benefits on stock compensation.
There were no material changes recorded in the first quarter of 2017 to NiSource's uncertain tax positions as of December 31, 2016.
11. Pension and Other Postretirement Benefits
NiSource provides defined contribution plans and noncontributory defined benefit retirement plans that cover certain of its employees. Benefits under the defined benefit retirement plans reflect the employees’ compensation, years of service and age at retirement. Additionally, NiSource provides health care and life insurance benefits for certain retired employees. The majority of employees may become eligible for these benefits if they reach retirement age while working for NiSource. The expected cost of such benefits is accrued during the employees’ years of service. For most plans, cash contributions are remitted to grantor trusts.
For the three months ended March 31, 2017, NiSource contributed $1.1 million to its pension plans and $7.6 million to its other postretirement benefit plans.
The following tables provide the components of the plans’ actuarially determined net periodic benefit cost for the three months ended March 31, 2017 and 2016:

| Pension Benefits |  | Other Postretirement Benefits
Three Months Ended March 31, (in millions) | 2017 |  | 2016 |  | 2017 |  | 2016
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |
Service cost(1) | $ | 7.5 |  |  | $ | 7.7 |  |  | $ | 1.2 |  |  | $ | 1.2 |
Interest cost(1) | 17.2 |  |  | 22.4 |  |  | 4.5 |  |  | 5.5 |
Expected return on assets | (30.3 | ) |  | (33.2 | ) |  | (4.0 | ) |  | (4.3 | )
Amortization of prior service credit | (0.2 | ) |  | (0.1 | ) |  | (1.1 | ) |  | (1.2 | )
Recognized actuarial loss | 13.4 |  |  | 15.3 |  |  | 0.8 |  |  | 0.8 |
Total Net Periodic Benefit Cost | $ | 7.6 |  |  | $ | 12.1 |  |  | $ | 1.4 |  |  | $ | 2.0 |

(1)Effective January 1, 2017, NiSource adopted the methodology of using a full yield curve (spot rate) approach to estimate the service and interest components of net periodic benefit cost. This change in accounting estimate resulted in a decrease in these costs for the three months ended March 31, 2017 when compared to the same period in 2016.

12. Long-Term Debt
NiSource Finance is a 100% owned, consolidated finance subsidiary of NiSource that engages in financing activities to raise funds for the business operations of NiSource and its subsidiaries. NiSource Finance was incorporated in March 2000 under the laws of the state of Indiana. Prior to 2000, the function of NiSource Finance was performed by Capital Markets. NiSource Finance obligations are fully and unconditionally guaranteed by NiSource. Consequently, no separate financial statements for NiSource Finance are required to be reported. No NiSource subsidiaries guarantee debt.
NiSource announced on April 26, 2017, that it intends to merge NiSource Finance and Capital Markets into NiSource during the second half of 2017, pending receipt of applicable approvals. Upon completion of the mergers, NiSource will become the primary obligor of NiSource Finance's and Capital Markets' outstanding obligations. The mergers are not expected to have any impact on NiSource's consolidated financial statements or the credit ratings of outstanding debt securities.
On March 27, 2017, Capital Markets redeemed $30.0 million of 7.86% and $2.0 million of 7.85% medium term notes at maturity.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
On April 3, 2017, Capital Markets redeemed $12.0 million of 7.82%, $10.0 million of 7.92%, $2.0 million of 7.93% and $1.0 million of 7.94% medium term notes at maturity.
13. Short-Term Borrowings
NiSource generates short-term borrowings from its revolving credit facility, commercial paper program, letter of credit issuances and accounts receivable transfer programs. Each of these borrowing sources is described further below.
NiSource Finance maintains a revolving credit facility to fund ongoing working capital requirements including the provision of liquidity support for its $1.5 billion commercial paper program, provide for issuance of letters of credit and also for general corporate purposes. NiSource Finance's revolving credit facility has a program limit of $1.85 billion and is comprised of a syndicate of banks led by Barclays Bank. At March 31, 2017 and December 31, 2016, NiSource had no outstanding borrowings under this facility.
NiSource Finance's commercial paper program has a program limit of up to $1.5 billion with a dealer group comprised of Barclays, Citigroup, Credit Suisse and Wells Fargo. As of March 31, 2017 and December 31, 2016, NiSource had commercial paper outstanding of $1,075.2 million and $1,178.0 million, respectively.
As of March 31, 2017 and December 31, 2016, NiSource had $14.7 million of stand-by letters of credit outstanding, all of which were under the revolving credit facility.
Transfers of accounts receivable are accounted for as secured borrowings resulting in the recognition of short-term borrowings on the Condensed Consolidated Balance Sheets (unaudited) in the amount of $439.0 million and $310.0 million as of March 31, 2017 and December 31, 2016, respectively. Refer to Note 8, "Transfers of Financial Assets," for additional information.
Short-term borrowings were as follows:

(in millions) | March 31, 2017 |  | December 31, 2016
Commercial Paper weighted-average interest rate of 1.37% and 1.24% at March 31, 2017 and December 31, 2016, respectively | $ | 1,075.2 |  |  | $ | 1,178.0 |
Accounts receivable securitization facility borrowings | 439.0 |  |  | 310.0 |
Total Short-Term Borrowings | $ | 1,514.2 |  |  | $ | 1,488.0 |

Given their maturities are less than 90 days, cash flows related to the borrowings and repayments of the items listed above are presented net in the Condensed Statements of Consolidated Cash Flows (unaudited).
14. Other Commitments and Contingencies
A. Guarantees and Indemnities. As a part of normal business, NiSource and certain subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries. Such agreements include guarantees and stand-by letters of credit. These agreements are entered into primarily to support or enhance the creditworthiness otherwise attributed to a subsidiary on a stand-alone basis, thereby facilitating the extension of sufficient credit to accomplish the subsidiaries’ intended commercial purposes. At March 31, 2017, NiSource had issued stand-by letters of credit of $14.7 million for the benefit of third parties.
B. Legal Proceedings. The Company is party to certain claims and legal proceedings arising in the ordinary course of business, none of which is deemed to be individually material at this time. Due to the inherent uncertainty of litigation, there can be no assurance that the resolution of any particular claim or proceeding would not have a material adverse effect on the Company’s results of operations, financial position or liquidity. If one or more of such matters were decided against the Company, the effects could be material to the Company’s results of operations in the period in which the Company would be required to record or adjust the related liability and could also be material to the Company’s cash flows in the periods the Company would be required to pay such liability.
C. Environmental Matters. NiSource operations are subject to environmental statutes and regulations related to air quality, water quality, hazardous waste and solid waste. NiSource believes that it is in substantial compliance with the environmental regulations currently applicable to its operations.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
It is management's continued intent to address environmental issues in cooperation with regulatory authorities in such a manner as to achieve mutually acceptable compliance plans. However, there can be no assurance that fines and penalties will not be incurred. Management expects a significant portion of environmental assessment and remediation costs to be recoverable through rates for certain NiSource companies.
As of March 31, 2017 and December 31, 2016, NiSource had recorded a liability of approximately $109.3 million and $111.4 million, respectively, to cover environmental remediation at various sites. The current portion of this liability is included in "Legal and environmental" in the Condensed Consolidated Balance Sheets (unaudited). The noncurrent portion is included in "Other noncurrent liabilities" in the Condensed Consolidated Balance Sheets (unaudited). NiSource recognizes costs associated with environmental remediation obligations when the incurrence of such costs is probable and the amounts can be reasonably estimated. The original estimates for remediation activities may differ materially from the amount ultimately expended. The actual future expenditures depend on many factors, including currently enacted laws and regulations, the nature and extent of impact, the method of remediation and the availability of cost recovery. These expenditures are not currently estimable at some sites. NiSource periodically adjusts its liability as information is collected and estimates become more refined.
Electric Operations' compliance estimates disclosed below are reflective of NIPSCO's Integrated Resource Plan submitted to the IURC on November 1, 2016. See section D, "Other Matters" below for additional information.
Air
The actions listed below could require further reductions in emissions from various emission sources. NiSource will continue to closely monitor developments in these matters.
Climate Change. Future legislative and regulatory programs, including implementation of the EPA CPP, could significantly limit allowed GHG emissions or impose a cost or tax on GHG emissions. Additionally, rules that increase methane leak detection, require emission reductions or impose additional requirements for natural gas facilities could restrict GHG emissions and impose additional costs. The CPP and other federally enacted or proposed GHG reduction measures are subject to numerous legal challenges that could change the way the programs are implemented, and NiSource will carefully monitor all GHG reduction proposals and regulations.
National Ambient Air Quality Standards. The CAA requires the EPA to set NAAQS for six "criteria" air pollutants considered harmful to public health and the environment. Periodically, the EPA imposes new, or modifies existing, NAAQS. States containing areas that do not meet the new or revised standards, or contribute significantly to nonattainment of downwind states, may be required to take steps to achieve and maintain compliance with the standards. These steps could include additional pollution controls on boilers, engines, turbines and other facilities owned by electric generation and gas distribution operations.
Ozone: On October 26, 2015, the EPA issued a final rule to lower the 8-hour ozone standard from 75 ppb to 70 ppb. After the EPA proceeds with designations, areas where NiSource operates that are currently designated in attainment with the standards may be reclassified as nonattainment. NiSource will continue to monitor this matter and cannot estimate its impact at this time.
Clean Power Plan. On October 23, 2015, the EPA issued a final rule to regulate CO 2 emissions from existing fossil-fuel EGUs under section 111(d) of the CAA. The final rule establishes national CO 2 emission-rate standards that are applied to each state’s mix of affected EGUs to establish state-specific emission-rate and mass-emission limits. The final rule requires each state to submit a plan indicating how the state will meet the EPA's emission-rate or mass-emission limit, including possibly imposing reduction obligations on specific units. If a state does not submit a satisfactory plan, the EPA will impose a federal plan on that state. On February 9, 2016, the U.S. Supreme Court stayed implementation of the CPP until litigation is decided on its merits. The cost to comply with this rule will depend on a number of factors, including the outcome of CPP litigation, the requirements of the state plan or final federal plan, and the level of NIPSCO's required CO 2 emission reductions. It is possible that this new rule, comprehensive federal or state GHG legislation or other GHG regulation could result in additional expense or compliance costs that could materially impact NiSource's financial results. NIPSCO will continue to monitor this matter and cannot estimate its impact at this time. Should costs be incurred to comply with the CPP, NIPSCO believes such costs will be eligible for recovery through customer rates.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
Waste
CERCLA. NiSource subsidiaries are potentially responsible parties at waste disposal sites under the CERCLA (commonly known as Superfund) and similar state laws. Additionally, NiSource affiliates have retained environmental liabilities, including remediation liabilities, associated with certain former operations.
MGP. A program has been instituted to identify and investigate former MGP sites where Gas Distribution Operations subsidiaries or predecessors may have liability. The program has identified 64 such sites where liability is probable. Remedial actions at many of these sites are being overseen by state or federal environmental agencies through consent agreements or voluntary remediation agreements.
NiSource utilizes a probabilistic model to estimate its future remediation costs related to its MGP sites. The model was prepared with the assistance of a third-party and incorporates NiSource and general industry experience with remediating MGP sites. NiSource completes an annual refresh of the model in the second quarter of each fiscal year. No material changes to the estimated future remediation costs were noted as a result of the refresh completed as of June 30, 2016. The total estimated liability at NiSource related to the facilities subject to remediation was $103.9 million and $105.5 million at March 31, 2017 and December 31, 2016, respectively. The liability represents NiSource’s best estimate of the probable cost to remediate the facilities. NiSource believes that it is reasonably possible that remediation costs could vary by as much as $25 million in addition to the costs noted above. Remediation costs are estimated based on the best available information, applicable remediation standards at the balance sheet date, and experience with similar facilities.
CCRs. On April 17, 2015, the EPA issued a final rule for regulation of CCRs. The rule regulates CCRs under the RCRA Subtitle D, which determines them to be nonhazardous. The rule is implemented in phases and requires increased groundwater monitoring, reporting, record keeping and posting of related information to the Internet. The rule also establishes requirements related to CCR management and disposal. The rule will allow NIPSCO to continue its byproduct beneficial use program.
The publication of the CCR rule resulted in revisions to previously recorded legal obligations associated with the retirement of certain NIPSCO facilities. The actual asset retirement costs related to the CCR rule may vary substantially from the estimates used to record the increased asset retirement obligation due to the uncertainty about the compliance strategies that will be used and the preliminary nature of available data used to estimate costs. In addition, to comply with the rule, NIPSCO will be required to incur future capital expenditures to modify its infrastructure and manage CCRs. Capital compliance costs are currently expected to cost approximately $230 million. As allowed by the EPA, NIPSCO will continue to collect data over time to determine the specific compliance solutions and associated costs and, as a result, the actual costs may vary. NIPSCO has filed a petition with the IURC seeking approval of the projects and to recover the costs associated with CCR compliance.
Water
ELG. On November 3, 2015, the EPA issued a final rule to amend the ELG and standards for the Steam Electric Power Generating category. The final rule became effective January 4, 2016. The rule imposes new water treatment and discharge requirements on NIPSCO's electric generating facilities to be applied between 2018 and 2023. On April 24, 2017, the Fifth Circuit Court of Appeals granted the EPA's motion to hold in abeyance the litigation challenging the ELG, while the EPA proceeds with review and reconsideration of the ELG. On April 25, 2017, the EPA published notice in the Federal Register that the EPA is reconsidering the ELG in response to two petitions for reconsideration and that the EPA administratively stays all future ELG compliance deadlines during its review. NIPSCO is unable to estimate the impact of the EPA stay and reconsideration at this time. Based upon a preliminary engineering study, capital compliance costs are currently expected to cost approximately $170 million. NIPSCO has filed a petition with the IURC seeking approval of the projects and to recover the costs associated with ELG compliance.
D. Other Matters.
Transmission Upgrade Agreements. On February 11, 2014, NIPSCO entered into TUAs with upgrade sponsors to complete upgrades on NIPSCO’s transmission system on behalf of those sponsors. The upgrade sponsors agreed to reimburse NIPSCO for the total cost to construct transmission upgrades and place them into service, multiplied by a rate of 1.71 ("the multiplier").
On June 10, 2014, certain upgrade sponsors for both TUAs filed a complaint at the FERC against NIPSCO regarding the multiplier stated in the TUAs. On June 30, 2014, NIPSCO filed an answer defending the terms of the TUAs and the just and reasonable nature of the multiplier charged therein and moved for dismissal of the complaint. On December 8, 2014, the FERC issued an order in response to the complaint finding that it is appropriate for NIPSCO to recover, through the multiplier, substantiated costs of ownership related to the TUAs. On August 10, 2016, NIPSCO reached settlement with all remaining parties to the complaint and filed with the FERC for approval. An order from the FERC approving the settlement was received on January 31, 2017. Receipt of the FERC order did not result in a material impact to the Consolidated Financial Statements.
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
At the time the TUAs were executed, it was assumed the proceeds received from the upgrade sponsors would be taxable to NIPSCO. Accordingly, the multiplier included a provision for such taxes. On June 10, 2016, the U.S. Treasury Department issued a notice regarding transfers of property to regulated utilities by electric generators, stating that transfers within the scope of the notice will not be treated as taxable. In response to this notice, NIPSCO recorded a liability of $8.6 million to reflect the estimated amount owed to the upgrade sponsors for the portion of the multiplier previously collected for taxes. This activity was recorded within "Other, net" in the 2016 Statement of Consolidated Income. On April 4, 2017, the U.S. Internal Revenue Service issued a private letter ruling to NIPSCO. The ruling provides that the deemed contribution of the intertie and all sums paid for construction meet the safe harbor requirements of Notice 2016-36 and, upon filing a change in accounting method, are excludable from gross income as a non-shareholder contribution to capital. The receipt of the private letter ruling will not have a material impact to the Condensed Consolidated Financial Statements (unaudited).
PHMSA Transmission. On March 17, 2016, PHMSA issued a proposed rule that would, if adopted, add new assessment and data requirements to existing transmission facilities that would necessitate expanded investigation and repair/replace activity on these facilities over the next 15 years. The comment period for the proposed rule closed on July 7, 2016. However, the final timing and scope of this rule remains uncertain. If adopted as proposed, this rule may require NiSource to incur significant incremental capital and operation and maintenance expenditures to achieve compliance. NiSource will continue to monitor this matter, and cannot reasonably estimate its impact at this time.
PHMSA EFV. On October 14, 2016, PHMSA issued a final rule that expands safety requirements for EFVs. Among the rule's provisions is a requirement for utilities to notify customers whose service lines are not currently equipped with an EFV of their right to request installation of an EFV. The rule took effect April 14, 2017. During 2017, NiSource's operating companies posted notifications on their websites in compliance with the rule and sought regulatory authority for their proposed cost recovery plans with their respective state regulatory commissions. The outcome of those proposed plans remains pending before the commissions. NiSource continues to evaluate the potential impacts of this regulation on its operations and cannot reasonably estimate its impact at this time.
NIPSCO 2016 Integrated Resource Plan. Environmental, regulatory and economic factors, including low natural gas prices and aging coal-fired units, have led NIPSCO to consider modifying its current electric generation supply mix to include less coal-fired generation. Due to enacted CCR and ELG legislation, NIPSCO would expect to incur over $1 billion in operating, maintenance, environmental and other costs over the next seven years if the current fleet of coal-fired generating units remain operational.
On November 1, 2016, NIPSCO submitted its 2016 Integrated Resource Plan with the IURC. The plan evaluated demand-side and supply-side resource alternatives to reliably and cost effectively meet NIPSCO customers' future energy requirements over the ensuing twenty years. The 2016 Integrated Resource Plan indicates that the most viable option for customers and NIPSCO involves the retirement of Bailly Generating Station (Units 7 and 8) as soon as mid-2018 and two units (Units 17 and 18) at the R.M. Schahfer Generating Station by the end of 2023. It is projected over the long term that the cost to customers to retire these units at these dates will be lower than maintaining and upgrading them for continuing generation.
NiSource and NIPSCO committed to the retirement of the Bailly Generating Station units in connection with the filing of the 2016 Integrated Resource Plan, pending approval by the MISO. In the fourth quarter of 2016, the MISO approved NIPSCO's plan to retire the Bailly Generating Station units by May 31, 2018. In accordance with ASC 980-360, the remaining net book value of the Bailly Generating Station units was reclassified from "Net utility plant" to "Other property, at cost, less accumulated depreciation" on the Condensed Consolidated Balance Sheets (unaudited).
In connection with the MISO's approval of NIPSCO's planned retirement of the Bailly Generating Station units, NiSource recorded $22.1 million of plant retirement-related charges in the fourth quarter of 2016. These charges were comprised of contract termination charges related to NIPSCO's capital lease with Pure Air (discussed further below), voluntary employee severance benefits, and write downs of certain materials and supplies inventory balances. These charges are presented within "Operation and maintenance" on the Statements of Consolidated Income.
NIPSCO Pure Air. NIPSCO has a service agreement with Pure Air, a general partnership between Air Products and Chemicals, Inc. and First Air Partners LP, under which Pure Air provides scrubber services to reduce sulfur dioxide emissions for Units 7 and 8 at the Bailly Generating Station. Services under this contract commenced on July 1, 1992 and expired on June 30, 2012. The agreement was renewed effective July 1, 2012 for ten years requiring NIPSCO to pay for the services under a combination of fixed and variable charges. NiSource has made an exhaustive effort to obtain information needed from Pure Air to determine the status of Pure Air as a VIE. However, NIPSCO has not been able to obtain this information and, as a result, it is unclear whether Pure Air is a VIE and if NIPSCO is the primary beneficiary. NIPSCO will continue to request the information required to determine whether Pure Air is a VIE. NIPSCO has no exposure to loss related to the service agreement with Pure Air and payments under
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
this agreement were $5.5 million and $4.9 million for the three months ended March 31, 2017 and 2016, respectively. In accordance with GAAP, the renewed agreement was evaluated to determine whether the arrangement qualifies as a lease. Based on the terms of the agreement, the arrangement qualified for capital lease accounting. As the effective date of the new agreement was July 1, 2012, NiSource capitalized this lease beginning in the third quarter of 2012.
As further discussed above in this Note 14 under the heading "NIPSCO 2016 Integrated Resource Plan," NIPSCO plans to retire the generation station units serviced by Pure Air by May 31, 2018. In December 2016, as allowed by the provisions of the service agreement, NIPSCO provided Pure Air formal notice of intent to terminate the service agreement, effective May 31, 2018. Providing this notice to Pure Air triggered a contract termination liability of $16 million which was recorded in fourth quarter of 2016. This expense was included as part of the plant retirement-related charges discussed above. Payment of this liability is not due until NIPSCO ceases use of the scrubber services. The liability is presented in "Other noncurrent liabilities" on the Condensed Consolidated Balance Sheets (unaudited). In addition, NIPSCO remeasured the remaining capital lease asset and obligation to reflect the change in estimated remaining minimum lease payments. This remeasurement was a non-cash transaction that had no impact on the Statements of Consolidated Income.
Technology Services. On December 31, 2013, NiSource Corporate Services Company signed a seven-year agreement with IBM to continue to provide business process and support functions to NiSource under a combination of fixed and variable charges, with the variable charges fluctuating based on the actual need for such services. The agreement was effective January 1, 2014 with a commencement date of April 1, 2014.
In April 2017, NiSource initiated a process to terminate its agreement with IBM and is negotiating contracts with IT service providers other than IBM. Upon a termination of the agreement with IBM by NiSource for any reason (other than material breach by IBM), NiSource may be required to pay IBM a termination charge that could include a breakage fee, repayment of IBM’s capital investments not yet recovered and IBM’s wind-down expense, which, if payable, could be material.
15. Accumulated Other Comprehensive Loss
The following tables display the components of Accumulated Other Comprehensive Loss:

Three Months Ended March 31, 2017 (in millions) | Gains and Losses on Securities(1) |  | Gains and Losses on Cash Flow Hedges(1) |  | Pension and OPEB Items(1) |  | Accumulated Other Comprehensive Loss(1)
Balance as of January 1, 2017 | $ | (0.6 | ) |  | $ | (6.9 | ) |  | $ | (17.6 | ) |  | $ | (25.1 | )
Other comprehensive income before reclassifications | 0.2 |  |  | 4.6 |  |  | 0.1 |  |  | 4.9 |
Amounts reclassified from accumulated other comprehensive loss | 0.2 |  |  | 0.3 |  |  | 0.1 |  |  | 0.6 |
Net current-period other comprehensive income | 0.4 |  |  | 4.9 |  |  | 0.2 |  |  | 5.5 |
Balance as of March 31, 2017 | $ | (0.2 | ) |  | $ | (2.0 | ) |  | $ | (17.4 | ) |  | $ | (19.6 | )

Three Months Ended March 31, 2016 (in millions) | Gains and Losses on Securities(1) |  | Gains and Losses on Cash Flow Hedges(1) |  | Pension and OPEB Items(1) |  | Accumulated Other Comprehensive Loss(1)
Balance as of January 1, 2016 | $ | (0.5 | ) |  | $ | (15.5 | ) |  | $ | (19.1 | ) |  | $ | (35.1 | )
Other comprehensive income (loss) before reclassifications | 1.7 |  |  | (71.2 | ) |  | 0.1 |  |  | (69.4 | )
Amounts reclassified from accumulated other comprehensive loss | — |  |  | 0.5 |  |  | 0.2 |  |  | 0.7 |
Net current-period other comprehensive income (loss) | 1.7 |  |  | (70.7 | ) |  | 0.3 |  |  | (68.7 | )
Balance as of March 31, 2016 | $ | 1.2 |  |  | $ | (86.2 | ) |  | $ | (18.8 | ) |  | $ | (103.8 | )

(1)All amounts are net of tax. Amounts in parentheses indicate debits.
16. Business Segment Information
At March 31, 2017, NiSource’s operations are divided into two primary reportable segments. The Gas Distribution Operations segment provides natural gas service and transportation for residential, commercial and industrial customers in Ohio, Pennsylvania,
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ITEM 1. FINANCIAL STATEMENTS (continued)
NiSource Inc.
Notes to Condensed Consolidated Financial Statements (unaudited) (continued)
Virginia, Kentucky, Maryland, Indiana and Massachusetts. The Electric Operations segment provides electric service in 20 counties in the northern part of Indiana.
The following table provides information about business segments. NiSource uses operating income as its primary measurement for each of the reported segments and makes decisions on finance, dividends and taxes at the corporate level on a consolidated basis. Segment revenues include intersegment sales to affiliated subsidiaries, which are eliminated in consolidation. Affiliated sales are recognized on the basis of prevailing market, regulated prices or at levels provided for under contractual agreements. Operating income is derived from revenues and expenses directly associated with each segment.

| Three Months Ended March 31,
(in millions) | 2017 |  | 2016
Gross Revenues |  |  |
Gas Distribution Operations |  |  |
Unaffiliated | $ | 1,176.3 |  |  | $ | 1,040.8 |
Intersegment | 3.5 |  |  | 3.2 |
Total | 1,179.8 |  |  | 1,044.0 |
Electric Operations |  |  |
Unaffiliated | 421.7 |  |  | 392.1 |
Intersegment | 0.2 |  |  | 0.2 |
Total | 421.9 |  |  | 392.3 |
Corporate and Other |  |  |
Unaffiliated | 0.6 |  |  | 3.7 |
Intersegment | 119.6 |  |  | 98.8 |
Total | 120.2 |  |  | 102.5 |
Eliminations | (123.3 | ) |  | (102.2 | )
Consolidated Gross Revenues | $ | 1,598.6 |  |  | $ | 1,436.6 |
Operating Income (Loss) |  |  |
Gas Distribution Operations | $ | 340.7 |  |  | $ | 314.9 |
Electric Operations | 77.0 |  |  | 70.3 |
Corporate and Other | (1.2 | ) |  | (3.8 | )
Consolidated Operating Income | $ | 416.5 |  |  | $ | 381.4 |

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
NiSource Inc.

Index | Page
Consolidated Review | 29
Executive Summary | 29
Results of Operations | 31
Results and Discussion of Segment Operations | 31
Gas Distribution Operations | 32
Electric Operations | 34
Liquidity and Capital Resources | 37
Off Balance Sheet Arrangements | 39
Market Risk Disclosures | 39
Other Information | 40

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
CONSOLIDATED REVIEW
This Management’s Discussion and Analysis of Financial Condition and Results of Operations (Management’s Discussion) analyzes the financial condition, results of operations and cash flows of NiSource and its subsidiaries. It also includes management’s analysis of past financial results and certain potential factors that may affect future results, potential future risks and approaches that may be used to manage those risks.
Management’s Discussion is designed to provide an understanding of NiSource's operations and financial performance and should be read in conjunction with NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016.
Executive Summary
NiSource is an energy holding company under the Public Utility Holding Company Act of 2005 whose subsidiaries are fully regulated natural gas and electric utility companies serving customers in seven states. NiSource generates substantially all of its operating income through these rate-regulated businesses which are summarized for financial reporting purposes into two primary reportable segments: Gas Distribution Operations and Electric Operations.
Refer to the “Business” section of NiSource’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 for further discussion of its regulated utility business segments.
NiSource’s goal is to develop strategies that benefit all stakeholders as it addresses changing customer conservation patterns, develops more contemporary pricing structures and embarks on long-term investment programs. These strategies are intended to improve reliability and safety, enhance customer services and reduce emissions while generating sustainable returns. Additionally, NiSource continues to pursue regulatory and legislative initiatives that will allow residential customers not currently on NiSource's system to obtain gas service in a cost effective manner.
Summary of Consolidated Financial Results
On a consolidated basis, NiSource reported net income of $211.3 million, or $0.65 per basic share for the three months ended March 31, 2017, compared to $186.6 million, or $0.58 per basic share for the same period in 2016. The increase in net income during 2017 was due primarily to increased operating income, as discussed below.
For the three months ended March 31, 2017, NiSource reported operating income of $416.5 million compared to $381.4 million for the same period in 2016. The higher operating income was primarily due to increased net revenues from new rates from base-rate proceedings and infrastructure replacement programs and increased rates from incremental capital spend on electric transmission projects at NIPSCO, partially offset by lower net revenues due to warmer weather. Operating expenses increased due to higher employee and administrative expenses, increased outside service costs, higher materials and supplies expenses and increased depreciation expense, partially offset by decreased amortization.
These factors and other impacts to the financial results are discussed in more detail within the following discussions of “Results of Operations,” “Results and Discussion of Segment Operations” and “Liquidity and Capital Resources.”
Capital Investment. In the three months ended 2017, NiSource invested $312.0 million in capital expenditures across its gas and electric utilities. These expenditures were primarily aimed at furthering the safety and reliability of NiSource's gas distribution system, construction of new electric transmission assets and maintaining NiSource’s existing electric generation fleet. NiSource continues to execute on an estimated $30 billion in total projected long-term regulated utility infrastructure investments and expects to invest approximately $1.6 billion to $1.7 billion in capital during 2017 to continue to modernize and improve its system across all seven states.
Liquidity. NiSource believes that through income generated from operating activities, amounts available under its short-term revolving credit facility, commercial paper program, accounts receivable securitization facilities, long-term debt agreements and NiSource’s ability to access the capital markets, there is adequate capital available to fund its operating activities and capital expenditures in 2017 and beyond. At March 31, 2017 and December 31, 2016, NiSource had $788.5 million and $683.7 million, respectively, of net liquidity available, consisting of cash and available capacity under credit facilities.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Regulatory Developments
In the three months ended March 31, 2017, NiSource continued to move forward on core infrastructure and environmental investment programs supported by complementary regulatory and customer initiatives across all seven states of its operating area. The discussion below summarizes significant regulatory developments that transpired during the first quarter of 2017:
Gas Distribution Operations

• | On March 17, 2017 the VSCC, by final order, approved a settlement agreement without modification in Columbia of Virginia's 2016 base rate case. The settlement allows for a $28.5 million annual revenue increase and for Columbia of Virginia to recover investments that improve the overall safety and reliability of its distribution system. The case also supported the growth of Columbia of Virginia's system driven by increased customer demand for service. Columbia of Virginia implemented interim base rates, subject to refund, on September 28, 2016. Under the terms of the final order, Columbia of Virginia will refund within 90 days the difference between the interim customer rates implemented in 2016 and the rates approved by the final order.

• | On April 26, 2017 the PUCO approved Columbia of Ohio's annual IRP rider adjustment. This order supports the continuation of significant infrastructure investment and allows for $31.5 million in increased annual revenue on approximately $235 million of investment.

• | On February 27, 2017 Columbia of Ohio filed an application with the PUCO for a five year extension of its IRP, which is currently authorized through December 31, 2017. This well-established pipeline replacement program covers accelerated replacement of priority mainline pipe and immediate replacement of targeted customer service lines. A PUCO order is expected by the end of the year.

• | On April 28, 2017 the Massachusetts DPU issued a decision on Columbia of Massachusetts' 2017 GSEP. This approval allows for recovery of investments of approximately $69 million through 2017 and an increase in annual revenues of $8.4 million, effective May 1, 2017.

• | On April 14, 2017, Columbia of Maryland filed a request with the MPSC to adjust its base rates so it can continue to expedite the replacement of aging pipe as well as adopt pipeline safety upgrades. If approved as filed, the rate adjustment would result in an annual revenue increase of approximately $6 million. An order is expected by the end of 2017.

• | NIPSCO continues to execute on its approved seven-year, $824 million gas infrastructure modernization program to further improve system reliability and safety. On February 28, 2017, NIPSCO filed its semi-annual tracker update with the IURC covering $61 million of investments that were made in the second half of 2016. An IURC order is expected in June 2017.

Electric Operations

• | NIPSCO continues to execute on its seven-year electric infrastructure modernization program, which includes enhancements to electric transmission and distribution infrastructure designed to improve system safety and reliability. The IURC-approved program represents approximately $1.25 billion of electric infrastructure investments expected to be made through 2022. NIPSCO began recovering on approximately $46 million of these investments with the first billing cycle of February 2017.

Refer to Note 5, “Regulatory Matters,” as well as to Note 14-D, "Other Matters," in the Notes to Condensed Consolidated Financial Statements (unaudited) for a complete discussion of key regulatory matters.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Results of Operations

Three Months Ended March 31, (in millions, except per share amounts) | 2017 |  | 2016 |  | 2017 vs. 2016
Total Net Revenues | $ | 1,046.3 |  |  | $ | 940.1 |  |  | $ | 106.2 |
Total Operating Expenses | 629.8 |  |  | 558.7 |  |  | 71.1 |
Operating Income | 416.5 |  |  | 381.4 |  |  | 35.1 |
Total Other Deductions, net | (84.0 | ) |  | (89.8 | ) |  | 5.8 |
Income Taxes | 121.2 |  |  | 105.0 |  |  | 16.2 |
Net Income | 211.3 |  |  | 186.6 |  |  | 24.7 |
Basic Earnings Per Share | $ | 0.65 |  |  | $ | 0.58 |  |  | $ | 0.07 |
Basic Average Common Shares Outstanding | 323.7 |  |  | 320.3 |  |  | 3.4 |

Operating Income
Substantially all of NiSource's operating income is generated by the Gas Distribution Operations and Electric Operations segments, the results of which are discussed in further detail within "Results and Discussion of Segment Operations."
Other Income (Deductions), net
Other income (deductions), net reduced income by $84.0 million in the first quarter of 2017 compared to a reduction in income of $89.8 million in the prior year. This change is due primarily to decreased interest expense of $5.3 million resulting from maturities of long-term debt.
Income Taxes
Refer to Note 10, "Income Taxes," in the Notes to Condensed Consolidated Financial Statements (unaudited) for information on income taxes.
RESULTS AND DISCUSSION OF SEGMENT OPERATIONS
Presentation of Segment Information
NiSource’s operations are divided into two primary reportable segments: Gas Distribution Operations and Electric Operations.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Gas Distribution Operations

Three Months Ended March 31, ($ in millions) | 2017 |  | 2016 |  | 2017 vs. 2016
Net Revenues |  |  |  |  |
Sales revenues | $ | 1,179.8 |  |  | $ | 1,044.0 |  |  | $ | 135.8 |
Less: Cost of gas sold (excluding depreciation and amortization) | 436.2 |  |  | 377.4 |  |  | 58.8 |
Net Revenues | 743.6 |  |  | 666.6 |  |  | 77.0 |
Operating Expenses |  |  |  |  |
Operation and maintenance | 282.6 |  |  | 238.4 |  |  | 44.2 |
Depreciation and amortization | 65.3 |  |  | 61.2 |  |  | 4.1 |
Other taxes | 55.0 |  |  | 52.1 |  |  | 2.9 |
Total Operating Expenses | 402.9 |  |  | 351.7 |  |  | 51.2 |
Operating Income | $ | 340.7 |  |  | $ | 314.9 |  |  | $ | 25.8 |
Revenues |  |  |  |  |
Residential | $ | 801.8 |  |  | $ | 681.8 |  |  | $ | 120.0 |
Commercial | 269.8 |  |  | 232.5 |  |  | 37.3 |
Industrial | 71.5 |  |  | 61.5 |  |  | 10.0 |
Off-System | 30.9 |  |  | 23.1 |  |  | 7.8 |
Other | 5.8 |  |  | 45.1 |  |  | (39.3 | )
Total | $ | 1,179.8 |  |  | $ | 1,044.0 |  |  | $ | 135.8 |
Sales and Transportation (MMDth) |  |  |  |  |
Residential | 113.5 |  |  | 120.8 |  |  | (7.3 | )
Commercial | 69.4 |  |  | 71.6 |  |  | (2.2 | )
Industrial | 132.8 |  |  | 140.2 |  |  | (7.4 | )
Off-System | 10.8 |  |  | 12.1 |  |  | (1.3 | )
Other | (0.1 | ) |  | (0.1 | ) |  | — |
Total | 326.4 |  |  | 344.6 |  |  | (18.2 | )
Heating Degree Days | 2,379 |  |  | 2,612 |  |  | (233 | )
Normal Heating Degree Days | 2,892 |  |  | 2,924 |  |  | (32 | )
% Warmer than Normal | (18 | )% |  | (11 | )% |  |  |
Gas Distribution Customers |  |  |  |  |
Residential | 3,152,326 |  |  | 3,128,567 |  |  | 23,759 |
Commercial | 280,480 |  |  | 278,965 |  |  | 1,515 |
Industrial | 6,225 |  |  | 6,460 |  |  | (235 | )
Other | 26 |  |  | 13 |  |  | 13 |
Total | 3,439,057 |  |  | 3,414,005 |  |  | 25,052 |

Net revenues are calculated as gross revenues less the associated cost of sales (excluding depreciation and amortization). Cost of sales at the Gas Distribution Operations segment is principally comprised of the cost of natural gas used while providing transportation and distribution services to its customers. The majority of the cost of sales are tracked costs that are passed through directly to the customer resulting in an equal and offsetting amount reflected in gross revenues.
Comparability of line item operating results may also be impacted by regulatory, tax and depreciation trackers (other than those for cost of sales) that allow for the recovery in rates of certain costs such as bad debt expense. Therefore, increases in these tracked operating expenses are offset by increases in net revenues and have essentially no impact on income from continuing operations.
Three months ended March 31, 2017 vs. March 31, 2016 Operating Income
For the first quarter of 2017, Gas Distribution Operations reported operating income of $340.7 million, an increase of $25.8 million from the comparable 2016 period.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Gas Distribution Operations
Net revenues for first quarter of 2017 were $743.6 million, an increase of $77.0 million from the same period in 2016. The change in net revenues was primarily driven by:

• | New rates from base-rate proceedings and infrastructure replacement programs of $61.3 million.

• | Higher regulatory, tax and depreciation trackers, which are offset in expense, of $22.3 million.

• | The effects of increased residential customer growth of $3.0 million.

Partially offset by:

• | The effects of warmer weather of $7.8 million.

Operating expenses were $51.2 million higher for the first quarter of 2017 compared to the same period in 2016. This change was primarily driven by:

• | Higher regulatory, tax and depreciation trackers, which are offset in net revenues, of $22.3 million.

• | Increased employee and administrative expenses of $14.3 million.

• | Higher outside service costs of $5.5 million.

• | Increased depreciation of $3.4 million and higher property taxes of $1.6 million due to higher capital expenditures placed in service.

Weather
In general, NiSource calculates the weather-related revenue variance based on changing customer demand driven by weather variance from normal heating degree days. NiSource's composite heating degree days reported do not directly correlate to the weather-related dollar impact on the results of Gas Distribution Operations. Heating degree days experienced during different times of the year or in different operating locations may have more or less impact on volume and dollars depending on when and where they occur. When the detailed results are combined for reporting, there may be weather-related dollar impacts on operations when there is not an apparent or significant change in the aggregated NiSource composite heating degree day comparison.
Weather in the Gas Distribution Operations service territories for the first quarter of 2017 was about 18% warmer than normal and about 9% warmer than 2016, decreasing net revenues $7.8 million for the quarter ended March 31, 2017 compared to 2016.
Throughput
Total volumes sold and transported for the first quarter of 2017 were 326.4 MMDth, compared to 344.6 MMDth for 2016. This 5% decrease is primarily attributable to the effects of warmer weather and decreased off-system sales opportunities in 2017.
Economic Conditions
All NiSource Gas Distribution Operations companies have state-approved recovery mechanisms that provide a means for full recovery of prudently incurred gas costs. Gas costs are treated as pass-through costs and have no impact on the net revenues recorded in the period. The gas costs included in revenues are matched with the gas cost expense recorded in the period and the difference is recorded on the Condensed Consolidated Balance Sheets (unaudited) as under-recovered or over-recovered gas cost to be included in future customer billings.
At NIPSCO, sales revenues and customer billings are adjusted for amounts related to under and over-recovered purchased gas costs from prior periods per regulatory order. These amounts are primarily reflected in the “Other” gross revenues statistic provided at the beginning of this segment discussion. The adjustments to other gross revenues for the three months ended March 31, 2017 and 2016 were a revenue decrease of $14.6 million and a revenue increase of $9.1 million, respectively.
Certain Gas Distribution Operations companies continue to offer choice opportunities, where customers can choose to purchase gas from a third-party supplier, through regulatory initiatives in their respective jurisdictions. These programs serve to further reduce NiSource's exposure to gas prices.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Electric Operations

Three Months Ended March 31, ($ in millions) | 2017 |  | 2016 |  | 2017 vs. 2016
Net Revenues |  |  |  |  |
Sales revenues | $ | 421.9 |  |  | $ | 392.3 |  |  | $ | 29.6 |
Less: Cost of sales (excluding depreciation and amortization) | 116.2 |  |  | 119.1 |  |  | (2.9 | )
Net Revenues | 305.7 |  |  | 273.2 |  |  | 32.5 |
Operating Expenses |  |  |  |  |  |
Operation and maintenance | 139.4 |  |  | 119.9 |  |  | 19.5 |
Depreciation and amortization | 72.0 |  |  | 67.0 |  |  | 5.0 |
Other taxes | 17.3 |  |  | 16.0 |  |  | 1.3 |
Total Operating Expenses | 228.7 |  |  | 202.9 |  |  | 25.8 |
Operating Income | $ | 77.0 |  |  | $ | 70.3 |  |  | $ | 6.7 |
Revenues |  |  |  |  |  |
Residential | $ | 115.7 |  |  | $ | 102.6 |  |  | $ | 13.1 |
Commercial | 120.7 |  |  | 103.5 |  |  | 17.2 |
Industrial | 179.1 |  |  | 161.8 |  |  | 17.3 |
Wholesale | 2.8 |  |  | 2.5 |  |  | 0.3 |
Other | 3.6 |  |  | 21.9 |  |  | (18.3 | )
Total | $ | 421.9 |  |  | $ | 392.3 |  |  | $ | 29.6 |
Sales (Gigawatt Hours) |  |  |  |  |  |
Residential | 752.6 |  |  | 803.6 |  |  | (51.0 | )
Commercial | 895.0 |  |  | 911.9 |  |  | (16.9 | )
Industrial | 2,363.3 |  |  | 2,420.7 |  |  | (57.4 | )
Wholesale | 20.2 |  |  | — |  |  | 20.2 |
Other | 33.4 |  |  | 34.5 |  |  | (1.1 | )
Total | 4,064.5 |  |  | 4,170.7 |  |  | (106.2 | )
Electric Customers |  |  |  |  |
Residential | 407,321 |  |  | 405,235 |  |  | 2,086 |
Commercial | 55,692 |  |  | 55,170 |  |  | 522 |
Industrial | 2,315 |  |  | 2,341 |  |  | (26 | )
Wholesale | 750 |  |  | 742 |  |  | 8 |
Other | 2 |  |  | — |  |  | 2 |
Total | 466,080 |  |  | 463,488 |  |  | 2,592 |

Net revenues are calculated as gross revenues less the associated cost of sales (excluding depreciation and amortization). Cost of sales at the Electric Operations segment is principally comprised of the cost of coal, related handling costs, and natural gas purchased for the internal generation of electricity at NIPSCO and the cost of power purchased from third-party generators of electricity. The majority of the cost of sales are tracked costs that are passed through directly to the customer resulting in an equal and offsetting amount reflected in gross revenues.
Comparability of line item operating results may also be impacted by regulatory and depreciation trackers (other than those for cost of sales) that allow for the recovery in rates of certain costs such as bad debt expense. Therefore, increases in these tracked operating expenses are offset by increases in net revenues and have essentially no impact on income from continuing operations.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Electric Operations
Three months ended March 31, 2017 vs. March 31, 2016 Operating Income
For the first quarter of 2017, Electric Operations reported operating income of $77.0 million, an increase of $6.7 million from the comparable 2016 period.
Net revenues for the first quarter of 2017 were $305.7 million, an increase of $32.5 million from the same period in 2016. The change in net revenues was primarily driven by:

• | New rates from base-rate proceedings of $20.9 million.

• | Higher regulatory and depreciation trackers, which are offset in expense, of $12.1 million.

• | Increased rates from incremental capital spend on electric transmission projects of $5.8 million.

Partially offset by:

• | Decreased residential and industrial usage of $3.3 million.

• | The effects of warmer weather of $4.0 million.

Operating expenses were $25.8 million higher for the first quarter of 2017 compared to the same period in 2016. This change was primarily driven by:

• | Higher regulatory and depreciation trackers, which are offset in net revenues, of $12.1 million.

• | Higher materials and supplies expenses of $6.7 million.

• | Increased outside service costs of $5.5 million, primarily due to generation-related maintenance.

• | Higher employee and administrative expenses of $2.9 million.

Partially offset by:

• | Decreased amortization expense of $3.6 million.

Weather
In general, NiSource calculates the weather-related revenue variance based on changing customer demand driven by weather variance from normal heating or cooling degree days. NiSource's composite heating or cooling degree days reported do not directly correlate to the weather-related dollar impact on the results of Electric Operations. Heating or cooling degree days experienced during different times of the year may have more or less impact on volume and dollars depending on when they occur. When the detailed results are combined for reporting, there may be weather-related dollar impacts on operations when there is not an apparent or significant change in the aggregated NiSource composite cooling degree day comparison.
Weather in the Electric Operations’ territories for the first quarter of 2017 was about 18% warmer than normal and about 9% warmer than 2016, decreasing net revenues $4.0 million for the quarter ended March 31, 2017 compared to 2016.
Sales
Electric Operations sales for the first quarter of 2017 were 4,064.5 gwh, a decrease of 106.2 gwh compared to the same period in 2016. The 3% decrease is primarily attributable to warmer weather in the first quarter of 2017.
Economic Conditions
NIPSCO has a state-approved recovery mechanism that provides a means for full recovery of prudently incurred fuel costs. Fuel costs are treated as pass-through costs and have no impact on the net revenues recorded in the period. The fuel costs included in revenues are matched with the fuel cost expense recorded in the period and the difference is recorded on the Condensed Consolidated Balance Sheets (unaudited) as under-recovered or over-recovered fuel cost to be included in future customer billings.
At NIPSCO, sales revenues and customer billings are adjusted for amounts related to under and over-recovered purchased fuel costs from prior periods per regulatory order. These amounts are primarily reflected in the “Other” gross revenues statistic provided at the beginning of this segment discussion. The adjustments to other gross revenues for the three months ended March 31, 2017 and 2016 were a revenue decrease of $19.0 million and a revenue increase of $2.6 million, respectively.
Electric Supply
NIPSCO 2016 Integrated Resource Plan. Environmental, regulatory and economic factors, including low natural gas prices and aging coal-fired units, have led NIPSCO to consider modifying its current electric generation supply mix to include less coal-fired
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Electric Operations
generation. Due to enacted CCR and ELG legislation, NIPSCO would expect to incur over $1 billion in operating, maintenance, environmental and other costs over the next seven years if the current fleet of coal-fired generating units remain operational.
On November 1, 2016, NIPSCO submitted its 2016 Integrated Resource Plan with the IURC. The plan evaluated demand-side and supply-side resource alternatives to reliably and cost effectively meet NIPSCO customers' future energy requirements over the ensuing twenty years. The 2016 Integrated Resource Plan indicates that the most viable option for customers and NIPSCO involves the retirement of Bailly Generating Station (Units 7 and 8) as soon as mid-2018 and two units (Units 17 and 18) at the R.M. Schahfer Generating Station by the end of 2023. It is projected over the long term that the cost to customers to retire these units at these dates will be lower than maintaining and upgrading them for continuing generation.
NiSource and NIPSCO committed to the retirement of the Bailly Generating Station units in connection with the filing of the 2016 Integrated Resource Plan, pending approval by the MISO. In the fourth quarter of 2016, the MISO approved NIPSCO's plan to retire the Bailly Generating Station units by May 31, 2018.
In connection with the MISO's approval of NIPSCO's planned retirement of the Bailly Generating Station units, NiSource recorded $22.1 million of plant retirement-related charges in the fourth quarter of 2016. These charges were comprised of contract termination charges related to NIPSCO's capital lease with Pure Air, voluntary employee severance benefits and write downs of certain materials and supplies inventory balances. Refer to Note 14-D, "Other Matters," in the Notes to Condensed Consolidated Financial Statements (unaudited) for information.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Liquidity and Capital Resources
Operating Activities
Net cash from operating activities from continuing operations for the three months ended March 31, 2017 was $411.1 million, an increase of $107.9 million compared to the three months ended March 31, 2016. This increase was driven by a combination of changes in weather, gas prices and the related approved rates for recovery, which significantly impacted regulatory assets, regulatory liabilities and working capital between the two periods.
Regulatory Assets and Liabilities. During the three months ended March 31, 2016, over-collected gas costs from 2015 were returned to customers resulting in an a use of cash. For the three months ended March 31, 2017, the source of cash is primarily attributable to the collection of under-recovered gas costs from 2016 which resulted from increasing gas prices toward the end of the year.
Working Capital. The change in components of working capital is primarily related to lower accruals for commodity purchases in 2017 compared to 2016 as a result of warmer weather in the current year.
Pension and Other Postretirement Plan Funding. For the three months ended March 31, 2017, NiSource contributed $1.1 million to its pension plans and $7.6 million to its other postretirement benefit plans. In 2017, NiSource expects to make contributions of approximately $9.1 million to its pension plans and approximately $25.3 million to its other postretirement medical and life plans.
Income Taxes. As of March 31, 2017, NiSource has a recorded deferred tax asset of $577.5 million related to a Federal NOL carryforward. As a result of being in an NOL position, NiSource was not required to make any cash payments for Federal income tax purposes during the three months ended March 31, 2017 and 2016. This NOL carryforward expires in 2030, however NiSource expects to fully utilize the carryforward benefit prior to its expiration.
Investing Activities
Net cash used for investing activities from continuing operations for the three months ended March 31, 2017 was $344.2 million, an increase of $28.9 million compared to the three months ended March 31, 2016.This increase was attributable to increased capital expenditures in 2017 and increased spend on non-legal cost of removal activities at NIPSCO.
NiSource’s capital expenditures for the three months ended March 31, 2017 were $312.0 million compared to $301.0 million for the comparable period in 2016. The increase in capital spend was driven by favorable weather conditions in 2017 which allowed for extended periods of construction as well as an increase in planned capital expenditures in the current year. NiSource projects 2017 capital expenditures to be approximately $1.6 billion to $1.7 billion.
Financing Activities
Short-term Debt. Refer to Note 13, “Short-Term Borrowings,” in the Notes to Condensed Consolidated Financial Statements (unaudited) for information on short-term debt.
Long-term Debt. Refer to Note 12, “Long-term Debt,” in the Notes to Condensed Consolidated Financial Statements (unaudited) for information on long-term debt.
Net Available Liquidity. As of March 31, 2017, an aggregate of $788.5 million of net liquidity was available, including cash and credit available under the revolving credit facility and accounts receivable securitization programs.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
The following table displays NiSource's liquidity position as of March 31, 2017 and December 31, 2016:

(in millions) | March 31, 2017 | December 31, 2016
Current Liquidity |  |
Revolving Credit Facility | $ | 1,850.0 |  | $ | 1,850.0 |
Accounts Receivable Program(1) | 439.0 |  | 310.0 |
Less: |  |
Drawn on Revolving Credit Facility | — |  | — |
Commercial Paper | 1,075.2 |  | 1,178.0 |
Accounts Receivable Program Utilized | 439.0 |  | 310.0 |
Letters of Credit Outstanding Under Credit Facility | 14.7 |  | 14.7 |
Add: |  |
Cash and Cash Equivalents | 28.4 |  | 26.4 |
Net Available Liquidity | $ | 788.5 |  | $ | 683.7 |

(1)Represents the lesser of the seasonal limit or maximum borrowings supportable by the underlying receivables.
Debt Covenants. NiSource is subject to financial covenants under its revolving credit facility and term loan agreement, which require NiSource to maintain a debt to capitalization ratio that does not exceed 70%. A similar covenant in a 2005 private placement note purchase agreement requires NiSource to maintain a debt to capitalization ratio that does not exceed 75%. As of March 31, 2017, the ratio was 65.4%.
Sale of Trade Accounts Receivables. Refer to Note 8, “Transfers of Financial Assets,” in the Notes to Condensed Consolidated Financial Statements (unaudited) for information on the sale of trade accounts receivable.
Credit Ratings. The credit rating agencies periodically review the Company’s ratings, taking into account factors such as its capital structure and earnings profile. The following table includes NiSource's and certain subsidiaries' credit ratings and ratings outlook as of March 31, 2017. Aside from those disclosed below, there were no changes to credit ratings or outlooks since December 31, 2016.

| S&P | Moody's | Fitch
| Rating | Outlook | Rating | Outlook | Rating | Outlook
NiSource(1) | BBB+ | Stable | Not rated | Not rated | BBB | Stable
Nisource Finance | BBB+ | Stable | Baa2 | Stable | BBB | Stable
Capital Markets | BBB+ | Stable | Baa2 | Stable | BBB | Stable
NIPSCO | BBB+ | Stable | Baa1 | Stable | BBB | Stable
Columbia of Massachusetts | BBB+ | Stable | Baa2 | Stable | Not rated | Not rated
Commercial Paper | A-2 | Stable | P-2 | Stable | F3 | Stable

(1) In April 2017, Moody's assigned a Baa2 senior unsecured rating to NiSource, with a stable outlook.
Certain NiSource subsidiaries have agreements that contain “ratings triggers” that require increased collateral if the credit ratings of NiSource or certain of its subsidiaries are below investment grade. These agreements are primarily for insurance purposes and for the physical purchase or sale of power. As of March 31, 2017, the collateral requirement that would be required in the event of a downgrade below the ratings trigger levels would amount to approximately $37.2 million. In addition to agreements with ratings triggers, there are other agreements that contain “adequate assurance” or “material adverse change” provisions that could necessitate additional credit support such as letters of credit and cash collateral to transact business.
Equity. NiSource has a shelf registration statement on file with the SEC that authorizes NiSource to issue an indeterminate amount of common stock and preferred stock, as well as other securities. The authorized capital stock of NiSource consists of 420,000,000 shares, $0.01 par value, of which 400,000,000 are common stock and 20,000,000 are preferred stock. As of March 31, 2017, 324,474,051 shares of common stock were outstanding. NiSource has no preferred stock outstanding as of March 31, 2017.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Contractual Obligations. Aside from the previously referenced repayment of long-term debt, there were no material changes recorded during the three months ended March 31, 2017 to NiSource’s contractual obligations as of December 31, 2016.
Off Balance Sheet Arrangements
As a part of normal business, NiSource and certain subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries. Such agreements include guarantees and stand-by letters of credit.
Refer to Note 14, “Other Commitments and Contingencies,” in the Notes to Condensed Consolidated Financial Statements (unaudited) for additional information about such arrangements.
Market Risk Disclosures
Risk is an inherent part of NiSource’s businesses. The extent to which NiSource properly and effectively identifies, assesses, monitors and manages each of the various types of risk involved in its businesses is critical to its profitability. NiSource seeks to identify, assess, monitor and manage, in accordance with defined policies and procedures, the following principal market risks that are involved in NiSource’s businesses: commodity price risk, interest rate risk and credit risk. Risk management at NiSource is a multi-faceted process with oversight by the Risk Management Committee that requires constant communication, judgment and knowledge of specialized products and markets. NiSource’s senior management takes an active role in the risk management process and has developed policies and procedures that require specific administrative and business functions to assist in the identification, assessment and control of various risks. These may include but are not limited to market, operational, financial, compliance and strategic risk types. In recognition of the increasingly varied and complex nature of the energy business, NiSource’s risk management process, policies and procedures continue to evolve and are subject to ongoing review and modification.
Commodity Price Risk
NiSource is exposed to commodity price risk as a result of its subsidiaries’ operations involving natural gas and power. To manage this market risk, NiSource’s subsidiaries use derivatives, including commodity futures contracts, swaps, forwards and options. NiSource does not participate in speculative energy trading activity.
Commodity price risk resulting from derivative activities at NiSource’s rate-regulated subsidiaries is limited, since regulations allow recovery of prudently incurred purchased power, fuel and gas costs through the ratemaking process, including gains or losses on these derivative instruments. If states should explore additional regulatory reform, these subsidiaries may begin providing services without the benefit of the traditional ratemaking process and may be more exposed to commodity price risk.
NiSource subsidiaries are required to make cash margin deposits with their brokers to cover actual and potential losses in the value of outstanding exchange traded derivative contracts. The amount of these deposits, which are reflected in NiSource’s restricted cash balance, may fluctuate significantly during periods of high volatility in the energy commodity markets.
Refer to Note 6, "Risk Management Activities," in the Condensed Consolidated Financial Statements (unaudited) for further information on NiSource's commodity price risk assets and liabilities as of March 31, 2017 or December 31, 2016.
Interest Rate Risk
NiSource is exposed to interest rate risk as a result of changes in interest rates on borrowings under its revolving credit agreement, commercial paper program, accounts receivable programs and term loan, which have interest rates that are indexed to short-term market interest rates. Based upon average borrowings and debt obligations subject to fluctuations in short-term market interest rates, an increase (or decrease) in short-term interest rates of 100 basis points (1%) would have increased (or decreased) interest expense by $4.8 million for the three months ended March 31, 2017 and $1.5 million for the three months ended March 31, 2016, respectively. NiSource is also exposed to interest rate risk as a result of changes in benchmark rates that can influence the interest rates of future debt issuances.
Refer to Note 6, "Risk Management Activities," in the Notes to Condensed Consolidated Financial Statements (unaudited) for further information on NiSource's interest rate risk assets and liabilities as of March 31, 2017 and December 31, 2016.
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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)
NiSource Inc.
Credit Risk
Due to the nature of the industry, credit risk is embedded in many of NiSource’s business activities. NiSource’s extension of credit is governed by a Corporate Credit Risk Policy. In addition, Risk Management Committee guidelines are in place which document management approval levels for credit limits, evaluation of creditworthiness, and credit risk mitigation efforts. Exposures to credit risks are monitored by the risk management function which is independent of commercial operations. Credit risk arises due to the possibility that a customer, supplier or counterparty will not be able or willing to fulfill its obligations on a transaction on or before the settlement date. For derivative-related contracts, credit risk arises when counterparties are obligated to deliver or purchase defined commodity units of gas or power to NiSource at a future date per execution of contractual terms and conditions. Exposure to credit risk is measured in terms of both current obligations and the market value of forward positions net of any posted collateral such as cash and letters of credit.
NiSource closely monitors the financial status of its banking credit providers. NiSource evaluates the financial status of its banking partners through the use of market-based metrics such as credit default swap pricing levels, and also through traditional credit ratings provided by major credit rating agencies.
Other Information
Critical Accounting Policies
Pension and Postretirement Benefits. On January 1, 2017, NiSource changed the method used to estimate the service and interest components of net periodic benefit cost for pension and other postretirement benefits. This change, compared to the previous method, resulted in a decrease in the actuarially-determined service and interest cost components. Historically, NiSource estimated service and interest costs utilizing a single weighted-average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. NiSource now utilizes a full yield curve approach to estimate these components by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. NiSource believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plan’s liability cash flows to the corresponding spot rates on the yield curve. The benefit obligations measured under this approach are unchanged. NiSource accounted for this change as a prospective change in accounting estimate. For further information on NiSource’s pension and other postretirement benefits, see Note 11, “Pension and Other Postretirement Benefits,” in the Notes to Condensed Consolidated Financial Statements (unaudited).
There were no additional significant changes to critical accounting policies for the period ended March 31, 2017.
Recently Issued Accounting Pronouncements
Refer to Note 2, "Recent Accounting Pronouncements," in the Notes to Condensed Consolidated Financial Statements (unaudited) for additional information about recently issued accounting pronouncements.
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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
NiSource Inc.
For a discussion regarding quantitative and qualitative disclosures about market risk see “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Market Risk Disclosures.”
ITEM 4. CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls and Procedures
NiSource’s chief executive officer and its chief financial officer are responsible for evaluating the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)). NiSource's disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed by us in reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including NiSource's chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure and is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. Based upon that evaluation, NiSource's chief executive officer and chief financial officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective to provide reasonable assurance that financial information was processed, recorded and reported accurately.
Changes in Internal Controls
There have been no changes in NiSource's internal control over financial reporting during the fiscal quarter covered by this report that has materially affected, or is reasonably likely to materially affect, NiSource's internal control over financial reporting.
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PART II
ITEM 1. LEGAL PROCEEDINGS
NiSource Inc.
The Company is party to certain claims and legal proceedings arising in the ordinary course of business, none of which is deemed to be individually material at this time. Due to the inherent uncertainty of litigation, there can be no assurance that the resolution of any particular claim or proceeding would not have a material adverse effect on the Company’s results of operations, financial position or liquidity. If one or more of such matters were decided against the Company, the effects could be material to the Company’s results of operations in the period in which the Company would be required to record or adjust the related liability and could also be material to the Company’s cash flows in the periods the Company would be required to pay such liability.
ITEM 1A. RISK FACTORS
NiSource’s operations and financial results are subject to various risks and uncertainties, including those disclosed in NiSource’s most recent Annual Report on Form 10-K for the year ended December 31, 2016. There have been no material changes to such risk factors.
ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
None.
ITEM 3. DEFAULTS UPON SENIOR SECURITIES
None.
ITEM 4. MINE SAFETY DISCLOSURES
Not applicable.
ITEM 5. OTHER INFORMATION
None.
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ITEM 6. EXHIBITS
NiSource Inc.

(31.1) | Certification of Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
(31.2) | Certification of Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
(32.1) | Certification of Chief Executive Officer pursuant to 18. U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith). *
(32.2) | Certification of Chief Financial Officer pursuant to 18. U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith). *
(101.INS) | XBRL Instance Document
(101.SCH) | XBRL Schema Document
(101.CAL) | XBRL Calculation Linkbase Document
(101.LAB) | XBRL Labels Linkbase Document
(101.PRE) | XBRL Presentation Linkbase Document
(101.DEF) | XBRL Definition Linkbase Document
* | Exhibit filed herewith.

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SIGNATURE
NiSource Inc.
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

|  |  | NiSource Inc. |
|  |  | (Registrant)
Date: | May 3, 2017 | By: | /s/ Joseph W. Mulpas
|  |  | Joseph W. Mulpas
|  |  | Vice President and Chief Accounting Officer (Principal Accounting Officer and Duly Authorized Officer)

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