In Clackamas 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 Oak Grove?

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

EIA-860M names Portland General Electric Co 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 Oak Grove LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Portland General Electric Co 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 "Oak Grove LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Oak Grove still running?

EIA-860M files it as "Out of service and NOT expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Oak Grove

Oak Grove is a 51 MW hydroelectric power plant in Clackamas County, Oregon, operated by Portland General Electric Co. EIA-860M lists 2 generating units here. Its units entered service between 1924 and 1931.

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: 51 MW; 44 MW net summer
Generating units: 2
In service: 1924–1931
EIA plant ID: 6505

Where it is

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County: Clackamas County, Oregon
Coordinates: 45.122, -122.0699
Balancing authority: PGE
Sector: Electric Utility

Units, technology and status

Operator of record: Portland General Electric Co
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Out of service and NOT expected to return to service in next calendar year

Every plant Portland General Electric Co reports to EIA →

Oak Grove: FAQ

Where is Oak Grove?: In Clackamas 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 Oak Grove?: 51 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Oak Grove?: EIA-860M names Portland General Electric Co 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 Oak Grove LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Portland General Electric Co 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 "Oak Grove LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Oak Grove still running?: EIA-860M files it as "Out of service and NOT expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.