In Blue Earth County, Minnesota (MN). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

25 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.

EIA-860M names Northern States Power Co - Minnesota 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 Wilmarth LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Northern States Power Co - Minnesota 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 "Wilmarth LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Wilmarth still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Wilmarth

Wilmarth is a 25 MW biomass power plant in Blue Earth County, Minnesota, operated by Northern States Power Co - Minnesota. EIA-860M lists 2 generating units here, inside MISO. Its units entered service between 1948 and 1951.

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: 25 MW; 18 MW net summer
Generating units: 2
In service: 1948–1951
EIA plant ID: 1934

Where it is

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County: Blue Earth County, Minnesota
Coordinates: 44.1967, -94.0009
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: Northern States Power Co - Minnesota
Primary energy source: Biomass
Technologies: Municipal Solid Waste
Status: Operating

Every plant Northern States Power Co - Minnesota reports to EIA →

Wilmarth: FAQ

Where is Wilmarth?: In Blue Earth County, Minnesota (MN). 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 Wilmarth?: 25 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Wilmarth?: EIA-860M names Northern States Power Co - Minnesota 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 Wilmarth LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Northern States Power Co - Minnesota 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 "Wilmarth LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Wilmarth still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.