Joint Plant Ownership (Tables)

12 Months Ended

Dec. 31, 2019

Columbia Units [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE's interest in Columbia's gross utility plant in service, and the related accumulated depreciation reserves as of December 31 were as follows:

(In thousands)		2019		2018
Utility plant	$	291,997	$	292,157
Accumulated depreciation		(105,778)		(94,766)
Property, plant, and equipment, net		186,219		197,391
Construction work in progress		1,777		2,021
Total property, plant, and equipment	$	187,996	$	199,412

Elm Road Units [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE Power Elm Road's interest in the portion of the Elm Road Units in-service and the related accumulated depreciation reserves as of December 31 were as follows:

(In thousands)		2019		2018
Nonregulated plant	$	207,834	$	207,361
Accumulated depreciation		(37,071)		(33,897)
Property, plant, and equipment, net		170,763		173,464
Construction work in progress		468		530
Total property, plant, and equipment	$	171,231	$	173,994

Forward Wind [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE's interest in the portion of Forward Wind's utility plant in service and the related accumulated depreciation reserves as of December 31 were as follows:

(In thousands)		2019		2018
Utility plant	$	34,054	$	33,929
Accumulated depreciation		(13,413)		(12,530)
Property, plant, and equipment, net		20,641		21,399
Construction work in progress		45		67
Total property, plant, and equipment	$	20,686	$	21,466

West Campus [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE Power West Campus' interest in WCCF and the related accumulated depreciation reserves as of December 31 were as follows:

(In thousands)		2019		2018
Nonregulated plant	$	113,259	$	113,328
Accumulated depreciation		(33,786)		(32,055)
Property, plant, and equipment, net		79,473		81,273
Construction work in progress		309		478
Total property, plant, and equipment	$	79,782	$	81,751