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Construction Program and Jointly-Owned Electric Generating Plants (Tables)
 12 Months Ended
Dec. 31, 2015
Construction Program and Jointly-Owned Electric Generating Plants [Abstract]  
Summary of Interests and Investments in Jointly-Owned Generating Facilities
At December 31, 2015, PNM’s interests and investments in jointly-owned generating facilities are:
Station (Fuel Type)
Plant in
Service
 
Accumulated
Depreciation
 
Construction
Work in
Progress
 
Composite
Interest
 
(In thousands)
SJGS (Coal) (1)
$
1,083,331

 
$
(428,684
)
 
$
20,117

 
46.30
%
PVNGS (Nuclear) (2)
$
562,412

 
$
(164,549
)
 
$
38,966

 
10.20
%
Four Corners Units 4 and 5 (Coal)
$
167,874

 
$
(102,559
)
 
$
19,390

 
13.00
%
Luna (Gas)
$
69,259

 
$
(23,048
)
 
$
33

 
33.33
%
 
(1) 
As discussed in Note 16, the NMPRC has approved the shutdown of SJGS Units 2 and 3 as of December 31, 2017. At December 31, 2015, PNM’s carrying value for its current ownership share of SJGS Units 2 and 3 included plant in service of $468.2 million, accumulated depreciation and amortization of $193.3 million, and construction work in progress of $2.2 million for a net undepreciated net book value of $277.1 million, which amounts are included in the table above. At December 31, 2015, PNM recorded a regulatory disallowance of $127.6 million representing its estimate of the portion of the December 31, 2017 net book value of SJGS Units 2 and 3 that will not be recovered from ratepayers, which is reflected as a reduction of plant in service on the Consolidated Balance Sheets.
(2) 
Includes interest in PVNGS Unit 3, interest in common facilities for all PVNGS units, and owned interests in PVNGS Units 1 and 2.
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:
 
2016
 
2017
 
2018
 
2019
 
2020
 
Total
 
 
 
 
 
(In millions)
 
 
 
 
PNM
$
396.4

 
$
295.1

 
$
269.3

 
$
220.3

 
$
183.7

 
$
1,364.8

TNMP
114.6

 
101.1

 
114.3

 
117.0

 
126.3

 
573.3

Corporate and Other
35.8

 
18.9

 
14.1

 
15.1

 
15.0

 
98.9

Total PNMR
$
546.8

 
$
415.1

 
$
397.7

 
$
352.4

 
$
325.0

 
$
2,037.0