Where is Chief Joseph?

In Douglas County, Washington (WA). 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 Chief Joseph?

2 GW of nameplate capacity across 27 units, as of the EIA-860M release for 2026-07.

Who owns Chief Joseph?

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 Chief Joseph 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 "Chief Joseph LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Chief Joseph still running?

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

Chief Joseph

Chief Joseph is a 2 GW hydroelectric power plant in Douglas County, Washington, operated by USACE Northwestern Division. EIA-860M lists 27 generating units here. Its units entered service between 1955 and 1979.

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: 2,456.2 MW; 2,456.2 MW net summer
Generating units: 27
In service: 1955–1979
EIA plant ID: 3921

Where it is

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County: Douglas County, Washington
Coordinates: 47.9951, -119.6404
Balancing authority: BPAT
Sector: Electric Utility

Units, technology and status

Operator of record: USACE Northwestern Division
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Operating (19) · Out of service but expected to return to service in next calendar year (6) · Out of service and NOT expected to return to service in next calendar year (2)

Every plant USACE Northwestern Division reports to EIA →

Chief Joseph: FAQ

Where is Chief Joseph?: In Douglas County, Washington (WA). 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 Chief Joseph?: 2 GW of nameplate capacity across 27 units, as of the EIA-860M release for 2026-07.
Who owns Chief Joseph?: 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 Chief Joseph 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 "Chief Joseph LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Chief Joseph still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.