Sumpter
Sumpter is a 340 MW natural gas power plant in Wayne County, Michigan, operated by Wolverine Power Supply Coop. EIA-860M lists 4 generating units here, inside MISO. Its units entered service in 2002.
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
- 340 MW
- 299.5 MW net summer
- Generating units
- 4
- In service
- 2002
- EIA plant ID
- 7972
Where it is
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- County
- Wayne County, Michigan
- Coordinates
- 42.167, -83.5318
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Wolverine Power Supply Coop
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combustion Turbine
- Status
- Operating
Sumpter: FAQ
- Where is Sumpter?
- In Wayne County, Michigan (MI). 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 Sumpter?
- 340 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.
- Who owns Sumpter?
- EIA-860M names Wolverine Power Supply 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 Sumpter LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Wolverine Power Supply 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 "Sumpter LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Sumpter still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.