In Umatilla 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.

991 MW of nameplate capacity across 14 units, 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 McNary 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 "McNary LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is McNary still running?

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

McNary

McNary is a 991 MW hydroelectric power plant in Umatilla County, Oregon, operated by USACE Northwestern Division. EIA-860M lists 14 generating units here. Its units entered service between 1953 and 1957.

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: 990.5 MW; 966.5 MW net summer
Generating units: 14
In service: 1953–1957
EIA plant ID: 3084

Where it is

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County: Umatilla County, Oregon
Coordinates: 45.9402, -119.2988
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 (12) · Out of service but expected to return to service in next calendar year (2)

Every plant USACE Northwestern Division reports to EIA →

McNary: FAQ

Where is McNary?: In Umatilla 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 McNary?: 991 MW of nameplate capacity across 14 units, as of the EIA-860M release for 2026-07.
Who owns McNary?: 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 McNary 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 "McNary LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is McNary still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.