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Joint Plant Ownership (Tables)

12 Months Ended

Dec. 31, 2014

Jointly Owned Utility Plant Interests [Line Items]

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)		2014		2013
Utility plant	$	268,597	$	123,097
Accumulated depreciation		(80,645)		(78,880)
Property, plant, and equipment, net	$	187,952	$	44,217
Construction work in progress		6,941		120,858
Total property, plant, and equipment	$	194,893	$	165,075

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)		2014		2013
Nonregulated plant	$	199,582	$	198,198
Accumulated depreciation		(19,962)		(15,541)
Property, plant, and equipment, net	$	179,620	$	182,657
Construction work in progress		1,976		1,115
Total property, plant, and equipment	$	181,596	$	183,772

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)		2014		2013
Nonregulated plant	$	111,453	$	111,268
Accumulated depreciation		(24,691)		(21,704)
Property, plant, and equipment, net	$	86,762	$	89,564

- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

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