Where is Saint Marys Falls?

In Chippewa 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 Saint Marys Falls?

24 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.

Who owns Saint Marys Falls?

EIA-860M names USACE-Detroit District 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 Saint Marys Falls LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — USACE-Detroit District 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 "Saint Marys Falls LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Saint Marys Falls still running?

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

Saint Marys Falls

Saint Marys Falls is a 24 MW hydroelectric power plant in Chippewa County, Michigan, operated by USACE-Detroit District. EIA-860M lists 5 generating units here, inside MISO. Its units entered service between 1932 and 1954.

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: 23.7 MW; 20 MW net summer
Generating units: 5
In service: 1932–1954
EIA plant ID: 1865

Where it is

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County: Chippewa County, Michigan
Coordinates: 46.5063, -84.3493
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: USACE-Detroit District
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Operating

Every plant USACE-Detroit District reports to EIA →

Saint Marys Falls: FAQ

Where is Saint Marys Falls?: In Chippewa 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 Saint Marys Falls?: 24 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.
Who owns Saint Marys Falls?: EIA-860M names USACE-Detroit District 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 Saint Marys Falls LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — USACE-Detroit District 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 "Saint Marys Falls LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Saint Marys Falls still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.