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Joint Plant (Tables) | 9 Months Ended
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Sep. 30, 2021
Public Utilities Property Plant And Equipment [Abstract] |
Schedule Of Jointly Owned Utility Plants | 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 September 30, |  | Date of Commercial
Project |  | Interest |  |  | Generation |  | Estimated Costs |  | 2021(a) |  | Operation
Badger Hollow I(b) |  |  | 33 | % |  |  | 50 |  | MW |  | $ | 65 |  | million |  | $ | 57.8 |  | million |  | Q4 2021(c)
Badger Hollow II(b) |  |  | 33 | % |  |  | 50 |  | MW |  | $ | 65 |  | million |  | $ | 11.5 |  | 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.

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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=122136288&loc=d3e659983-123033 + Details
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