Joint Plant Ownership

3 Months Ended

Mar. 31, 2022

Public Utilities, Property, Plant and Equipment [Abstract]

Jointly Owned Electric Utility Plant

12.Joint Plant Construction Project 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 March 31,	Estimated Date of Commercial
Project	Interest	Generation	Estimated Costs(a)	2022(a)	Operation
Red Barn(b)	10%	9.16 MW	$18 million	$0.6 million	December 2022
Badger Hollow II(c)	33%	50 MW	$65 million	$23.8 million(d)	First Half of 2023

(a)Excluding AFUDC.

(b)The Red Barn Wind Farm is located in the Towns of Wingville and Clifton in Grant County, Wisconsin.

(c)The Badger Hollow II solar farm is located in southwestern Wisconsin in Iowa County, near the villages of Montfort and Cobb.

(d)Includes an allocation of common facilities at Badger Hollow placed in service in November 2021.

MGE received specific approval to recover 100% AFUDC on Badger Hollow II. During the three months ended March 31, 2022 and 2021, MGE recognized $0.4 million and $0.1 million, respectively, after tax, in AFUDC for Badger Hollow II.