Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

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

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

		MGE Energy				MGE
(In thousands)		2015		2014		2015		2014
Utility:
Electric	$	1,147,701	$	1,110,953	$	1,147,718	$	1,110,970
Gas		384,163		369,975		384,175		369,987
Total utility plant		1,531,864		1,480,928		1,531,893		1,480,957
Less: Accumulated depreciation and amortization		578,410		559,615		578,410		559,615
In-service utility plant, net		953,454		921,313		953,483		921,342
Nonregulated:
Nonregulated		315,589		313,152		314,750		312,314
Less: Accumulated depreciation and amortization		51,949		45,388		51,818		45,305
In-service nonregulated plant, net		263,640		267,764		262,932		267,009
Construction work in progress:
Utility construction work in progress		23,837		16,988		23,837		16,988
Nonregulated construction work in progress		2,514		2,041		2,514		2,041
Total property, plant, and equipment	$	1,243,445	$	1,208,106	$	1,242,766	$	1,207,380

MGE's utility plant is subject to the lien of its Indenture of Mortgage and Deed of Trust. As of December 31, 2015 and 2014, there was $1.2 million of bonds outstanding under that indenture. See Footnote 9 for further discussion of the mortgage indenture.