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Construction Program and Jointly-Owned Electric Generating Plants | 12 Months Ended
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Dec. 31, 2019
Construction Program and Jointly-Owned Electric Generating Plants [Abstract] |
Construction Program and Jointly-Owned Electric Generating Plants | Construction Program and Jointly-Owned Electric Generating Plants PNM is a participant in several jointly-owned power plant projects. The primary operating or participation agreements for the joint projects expire in July 2022 for SJGS, July 2041 for Four Corners, December 2046 for Luna, and November 2047 for PVNGS. PNM’s expenditures for additions to utility plant were $341.8 million in 2019, including expenditures on jointly-owned projects. TNMP does not participate in the ownership or operation of any generating plants, but incurred expenditures for additions to utility plant of $254.0 million during 2019. On a consolidated basis, PNMR’s expenditures for additions to utility plant were $616.3 million in 2019. Joint Projects Under the agreements for the jointly-owned projects, PNM has an undivided interest in each asset and liability of the project and records its pro-rata share of each item in the corresponding asset and liability account on PNM’s Consolidated Balance Sheets. Likewise, PNM records its pro-rata share of each item of operating and maintenance expenses for its jointly-owned plants within the corresponding operating expense account in its Consolidated Statements of Earnings. PNM is responsible for financing its share of the capital and operating costs of the joint projects. At December 31, 2019, PNM’s interests and investments in jointly-owned generating facilities are:
Station (Fuel Type) | Plant in Service |  | Accumulated Depreciation(1) |  | Construction Work in Progress |  | Composite Interest
| (In thousands)
SJGS (Coal) | $ | 779,236 |  |  | $ | (435,312 | ) |  | $ | 486 |  |  | 66.35 | %
PVNGS (Nuclear) (2) | $ | 819,613 |  |  | $ | (369,431 | ) |  | $ | 31,275 |  |  | 10.20 | %
Four Corners Units 4 and 5 (Coal) | $ | 283,939 |  |  | $ | (100,137 | ) |  | $ | 10,794 |  |  | 13.00 | %
Luna (Gas) | $ | 78,258 |  |  | $ | (30,255 | ) |  | $ | — |  |  | 33.33 | %
(1) Includes cost of removal. (2) Includes interest in PVNGS Unit 3, interest in common facilities for all PVNGS units, and owned interests in PVNGS Units 1 and 2, including improvements. San Juan Generating Station PNM operates and jointly owns SJGS. Effective January 1, 2018, SJGS Unit 1 is owned 50% by PNM and 50% by Tucson and SJGS Unit 4 is owned 77.297% by PNM, including a 12.8% interest held as merchant plant, 8.475% by Farmington, 7.2% by Los Alamos, and 7.028% by UAMPS. See Notes 16 and 17 for additional information about SJGS, including the shutdown of SJGS Units 2 and 3 in December 2017 and the restructuring of SJGS ownership as well as information on PNM’s SJGS Abandonment Application. Palo Verde Nuclear Generating Station PNM is a participant in the three units of PVNGS with APS (the operating agent), SRP, EPE, SCE, SCPPA, and The Department of Water and Power of the City of Los Angeles. PNM has a 10.2% undivided interest in PVNGS, with portions of its interests in Units 1 and 2 held under leases. See Note 8 for additional information concerning the PVNGS leases, including PNM’s purchase of the assets underlying certain of the leases in January 2016, PNM’s option to purchase or return certain lease interests that have been extended through 2023 and 2024, and Note 17 for the outcome of PNM’s appeal to the NM Supreme Court regarding the NMPRC’s treatment of those purchases and lease extensions in the NM 2015 Rate Case. Operation of each of the three PVNGS units requires an operating license from the NRC. The NRC issued full power operating licenses for Unit 1 in June 1985, Unit 2 in April 1986, and Unit 3 in November 1987. The full power operating licenses were originally for a period of 40 years and authorize APS, as operating agent for PVNGS, to operate the three PVNGS units. In April 2011, the NRC approved extensions in the operating licenses for the plants for 20 years through June 2045 for Unit 1, April 2046 for Unit 2, and November 2047 for Unit 3. Four Corners Power Plant PNM is a participant in two units of Four Corners with APS (the operating agent), an affiliate of APS, SRP, and Tucson. PNM has a 13.0% undivided interest in Units 4 and 5 of Four Corners. The Four Corners plant site is located on land within the Navajo Nation and is subject to an easement from the federal government. APS, on behalf of the Four Corners participants, negotiated amendments to an existing agreement with the Navajo Nation, which extends the owners’ right to operate the plant on the site to July 2041. See Note 16 for additional information about Four Corners. The NMPRC indicated in the NM 2016 Rate Case that it will review the prudency of PNM’s decision to continue its participation in Four Corners in PNM’s next general rate case filing. See Note 17. Luna Energy Facility Luna is a combined-cycle power plant near Deming, New Mexico. Luna is owned equally by PNM, Tucson, and Samchully Power & Utilities 1, LLC. The operation and maintenance of the facility has been contracted to North American Energy Services. Construction Program The Company anticipates making substantial capital expenditures for the construction and acquisition of utility plant and other property and equipment. An unaudited summary of the budgeted construction expenditures, including expenditures for jointly-owned projects, and nuclear fuel, is as follows:
| 2020 |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | Total
|  |  |  |  | (In millions) |  |  |  |
PNM | $ | 447.5 |  |  | $ | 701.4 |  |  | $ | 331.6 |  |  | $ | 398.0 |  |  | $ | 280.4 |  |  | $ | 2,158.9 |
TNMP | 337.2 |  |  | 270.0 |  |  | 342.0 |  |  | 348.0 |  |  | 245.0 |  |  | 1,542.2 |
Corporate and Other | 27.0 |  |  | 21.0 |  |  | 21.0 |  |  | 25.0 |  |  | 21.0 |  |  | 115.0 |
Total PNMR | $ | 811.7 |  |  | $ | 992.4 |  |  | $ | 694.6 |  |  | $ | 771.0 |  |  | $ | 546.4 |  |  | $ | 3,816.1 |
The construction expenditure estimates are under continuing review and subject to ongoing adjustment, as well as to Board review and approval. The above construction expenditures include $297.6 million of replacement power in anticipation of the SJGS abandonment and approximately $376.8 million for an anticipated expansion of PNM’s transmission system. See Note 17.

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- Definition Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25287-109308 + Details
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