In Wasco 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 The Dalles?

2 GW of nameplate capacity across 24 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 The Dalles 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 "The Dalles LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is The Dalles still running?

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

The Dalles

The Dalles is a 2 GW hydroelectric power plant in Wasco County, Oregon, operated by USACE Northwestern Division. EIA-860M lists 24 generating units here. Its units entered service between 1957 and 1973.

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: 1,819.7 MW; 1,822.7 MW net summer
Generating units: 24
In service: 1957–1973
EIA plant ID: 3895

Where it is

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County: Wasco County, Oregon
Coordinates: 45.614, -121.1346
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 (15) · Out of service but expected to return to service in next calendar year (7) · Out of service and NOT expected to return to service in next calendar year (2)

Every plant USACE Northwestern Division reports to EIA →

The Dalles: FAQ

Where is The Dalles?: In Wasco 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 The Dalles?: 2 GW of nameplate capacity across 24 units, as of the EIA-860M release for 2026-07.
Who owns The Dalles?: 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 The Dalles 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 "The Dalles LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is The Dalles still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.