Hermiston Generating Plant
Hermiston Generating Plant is a 621 MW natural gas power plant in Umatilla County, Oregon, operated by Hermiston Generating Co LP. EIA-860M lists 4 generating units here. Its units entered service in 1996.
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
- 621.2 MW
- 464 MW net summer
- Generating units
- 4
- In service
- 1996
- EIA plant ID
- 54761
Where it is
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- County
- Umatilla County, Oregon
- Coordinates
- 45.8042, -119.37
- Balancing authority
- PACW
- Sector
- IPP CHP
Units, technology and status
- Operator of record
- Hermiston Generating Co LP
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combined Cycle
- Status
- Operating
Hermiston Generating Plant: FAQ
- Where is Hermiston Generating Plant?
- 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 Hermiston Generating Plant?
- 621 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.
- Who owns Hermiston Generating Plant?
- EIA-860M names Hermiston Generating Co LP 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 Hermiston Generating Plant LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Hermiston Generating Co LP 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 "Hermiston Generating Plant LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Hermiston Generating Plant still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.