In Marion County, Oregon (OR). 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 Big Cliff?

18 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

EIA-860M names USACE Northwestern Division 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 Big Cliff LLC?

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

Is Big Cliff still running?

EIA-860M files it as "Out of service but expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Big Cliff

Big Cliff is a 18 MW hydroelectric power plant in Marion County, Oregon, operated by USACE Northwestern Division. EIA-860M lists 1 generating unit here. Its unit entered service in 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: 18 MW; 21 MW net summer
Generating units: 1
In service: 1954
EIA plant ID: 3074

Where it is

Loading map…

County: Marion County, Oregon
Coordinates: 44.7514, -122.2832
Balancing authority: BPAT
Sector: Electric Utility

Units, technology and status

Operator of record: USACE Northwestern Division
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Out of service but expected to return to service in next calendar year

Every plant USACE Northwestern Division reports to EIA →

Big Cliff: FAQ

Where is Big Cliff?: In Marion County, Oregon (OR). 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 Big Cliff?: 18 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Big Cliff?: EIA-860M names USACE Northwestern Division 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 Big Cliff LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — USACE Northwestern Division 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 "Big Cliff LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Big Cliff still running?: EIA-860M files it as "Out of service but expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.