Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2012

Property, Plant, and Equipment Disclsoure [Abstract]

Property, Plant and Equipment

3.       Property, Plant, and Equipment - MGE Energy and MGE.

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

		MGE Energy				MGE
(In thousands)		2012		2011		2012		2011
Utility:
Electric	$	912,273	$	886,589	$	912,289	$	886,606
Gas		332,767		319,502		332,779		319,513
Total utility plant		1,245,040		1,206,091		1,245,068		1,206,119
Less: Accumulated depreciation and amortization		546,483		526,308		546,483		526,308
In-service utility plant, net		698,557		679,783		698,585		679,811
Nonregulated:
Nonregulated		308,043		307,182		307,511		306,650
Less: Accumulated depreciation and amortization		31,547		25,454		31,547		25,454
In-service nonregulated plant, net		276,496		281,728		275,964		281,196
Construction work in progress:
Utility construction work in progress		96,863		33,218		96,863		33,218
Nonregulated construction work in progress		1,548		837		1,548		837
Total property, plant, and equipment	$	1,073,464	$	995,566	$	1,072,960	$	995,062

MGE's utility plant is subject to the lien of its Indenture of Mortgage and Deed of Trust. As of December 31,2012, there was $1.2 million of bonds outstanding under that indenture. See Footnote 9 for further discussion of the mortgage indenture.