Joint Plant Ownership

3 Months Ended

Mar. 31, 2021

Public Utilities Property Plant And Equipment [Abstract]

Jointly Owned Electric Utility Plant

Joint Plant Ownership - MGE Energy and MGE

MGE currently has ongoing jointly-owned solar generation construction projects, as shown in the following table. Incurred costs are reflected in "Construction work in progress" on the consolidated balance sheets.

	Ownership		Share of		Share of		Costs incurred as of		Date of Commercial
Project	Interest		Generation		Estimated Costs		March 31, 2021(a)		Operation
Badger Hollow I(b)	33	%	50	MW	$65	million	$56.4	million	Q3 2021(c)
Badger Hollow II(b)	33	%	50	MW	$65	million	$5.3	million	December 2022(c)

(a)Excluding AFUDC.

(b)The Badger Hollow I and Badger Hollow II solar farms are located in southwestern Wisconsin in Iowa County, near the villages of Montfort and Cobb.

(c)Estimated date of commercial operation.

MGE received specific approval to recover 100% AFUDC on each of these projects. During the three months ended March 31, 2021 and 2020, MGE recognized $1.1 million and $0.4 million, respectively, after tax, in AFUDC for Badger Hollow I and II.