Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant, and Equipment

Property, plant, and equipment consisted of the following as of December 31:

		MGE Energy				MGE
(In thousands)		2020		2019		2020		2019
Utility:
Electric(a)	$	1,608,658	$	1,480,684	$	1,608,675	$	1,480,701
Gas		496,450		472,123		496,461		472,134
Total utility plant		2,105,108		1,952,807		2,105,136		1,952,835
Less: Accumulated depreciation and amortization		721,382		674,251		721,382		674,251
In-service utility plant, net		1,383,726		1,278,556		1,383,754		1,278,584
Nonregulated:
Nonregulated		320,691		323,266		320,691		323,266
Less: Accumulated depreciation and amortization		74,131		71,623		74,131		71,623
In-service nonregulated plant, net		246,560		251,643		246,560		251,643

Construction work in progress:
Utility construction work in progress(b)		137,725		111,707		137,725		111,707
Nonregulated construction work in progress		1,374		777		1,374		777
Total property, plant, and equipment	$	1,769,385	$	1,642,683	$	1,769,413	$	1,642,711

(a) In 2019, the PSCW authorized construction of Two Creeks. The project was placed in service in November 2020. Total capital expenditures for the project were $62.9 million, excluding AFUDC. After tax, MGE recognized $2.4 million and $1.0 million, respectively, of AFUDC equity for the years ended December 31, 2020 and 2019. MGE received specific approval to recover 100% AFUDC on the project.

(b)In 2019, the PSCW authorized construction of Badger Hollow I. Construction of the project is expected to be completed in April 2021. As of December 31, 2020, and 2019, MGE had $54.7 million and $18.7 million (excluding AFUDC), respectively, in construction work in progress. After tax, MGE recognized $2.0 million and $0.2 million, respectively, of AFUDC equity related to Badger Hollow I for the years ended December 31, 2020 and 2019. Phase II of the project was authorized by the PSCW in 2020. Construction of Badger Hollow II is expected to be completed in December 2022. As of December 31, 2020, MGE had $5.2 million (excluding AFUDC) in construction work in progress. After tax, MGE recognized $0.2 million of AFUDC equity related to Badger Hollow II for the year ended December 31, 2020. MGE received specific approval to recover 100% AFUDC on these projects.