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Construction Program and Jointly-Owned Electric Generating Plants (Tables)
12 Months Ended
Dec. 31, 2020
Construction Program and Jointly-Owned Electric Generating Plants [Abstract]  
Summary of Interests and Investments in Jointly-Owned Generating Facilities
At December 31, 2020, 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)$780,544 $(448,213)$659 66.35 %
PVNGS (Nuclear) (2)
$828,191 $(387,436)$37,235 10.20 %
Four Corners Units 4 and 5 (Coal)$301,867 $(100,187)$7,820 13.00 %
Luna (Gas)$76,917 $(29,758)$57 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.
Summary of Budgeted Construction Expenditures An unaudited summary of the budgeted construction expenditures, including expenditures for jointly-owned projects, and nuclear fuel, is as follows:
20212022202320242025Total
   (In millions)  
PNM$661.9 $396.6 $382.0 $388.5 $379.9 $2,208.9 
TNMP320.1 342.0 348.0 298.0 299.0 1,607.1 
Corporate and Other34.5 26.5 31.2 26.5 26.5 145.2 
Total PNMR$1,016.5 $765.1 $761.2 $713.0 $705.4 $3,961.2