Where is Grandfather Falls?

In Lincoln 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 Grandfather Falls?

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

Who owns Grandfather Falls?

EIA-860M names Wisconsin Public Service Corp 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 Grandfather Falls LLC?

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

Is Grandfather Falls still running?

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

Grandfather Falls

Grandfather Falls is a 17 MW hydroelectric power plant in Lincoln County, Wisconsin, operated by Wisconsin Public Service Corp. EIA-860M lists 2 generating units here, inside MISO. Its units entered service in 1938.

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: 17.2 MW; 17.2 MW net summer
Generating units: 2
In service: 1938
EIA plant ID: 4063

Where it is

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County: Lincoln County, Wisconsin
Coordinates: 45.3019, -89.7917
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: Wisconsin Public Service Corp
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Operating

Every plant Wisconsin Public Service Corp reports to EIA →

Grandfather Falls: FAQ

Where is Grandfather Falls?: In Lincoln 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 Grandfather Falls?: 17 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Grandfather Falls?: EIA-860M names Wisconsin Public Service Corp 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 Grandfather Falls LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Wisconsin Public Service Corp 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 "Grandfather Falls LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Grandfather Falls still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.