Joint Plant Ownership (Tables)

12 Months Ended

Dec. 31, 2015

Columbia Units [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

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

(In thousands)		2015		2014
Utility plant	$	273,762	$	268,597
Accumulated depreciation		(84,864)		(80,645)
Property, plant, and equipment, net		188,898		187,952
Construction work in progress		17,110		6,941
Total property, plant, and equipment	$	206,008	$	194,893

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 at December 31 were as follows:

(In thousands)		2015		2014
Nonregulated plant	$	202,326	$	199,582
Accumulated depreciation		(24,422)		(19,962)
Property, plant, and equipment, net		177,904		179,620
Construction work in progress		2,400		1,976
Total property, plant, and equipment	$	180,304	$	181,596

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 at December 31 were as follows:

(In thousands)		2015		2014
Nonregulated plant	$	111,141	$	111,453
Accumulated depreciation		(26,738)		(24,691)
Property, plant, and equipment, net	$	84,403	$	86,762