John P Madgett
John P Madgett is a 387 MW coal power plant in Buffalo County, Wisconsin, operated by Dairyland Power Coop. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 1979.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 387 MW
- 389.8 MW net summer
- Generating units
- 1
- In service
- 1979
- EIA plant ID
- 4271
Where it is
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- County
- Buffalo County, Wisconsin
- Coordinates
- 44.3036, -91.9126
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Dairyland Power Coop
- Primary energy source
- Coal
- Technologies
- Conventional Steam Coal
- Status
- Operating
John P Madgett: FAQ
- Where is John P Madgett?
- In Buffalo County, Wisconsin (WI). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is John P Madgett?
- 387 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns John P Madgett?
- EIA-860M names Dairyland Power Coop as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as John P Madgett LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Dairyland Power Coop here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "John P Madgett LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is John P Madgett still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.