Hermiston Power Partnership — Plant Summary
- EIA Plant ID
- 55328
- Capacity
- 689.4 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Umatilla, OR
- Operating Since
- 2002
- Generators
- 3
- Operator
- Hermiston Power Partnership
- Parent Company
- —
- Annual Generation
- 2,988,998 MWh
- Capacity Factor
- 49.8%
- Balancing Authority
- Gridforce Energy Management, LLC
- ISO/RTO
- —
- NERC Region
- WECC
Hermiston Power Partnership
OperatingNatural Gas
Ranked #1 of 13 Natural Gas plants in OR#322 of 2009 nationally
689.4 MW Natural Gas operating in Umatilla, OR — Gridforce Energy Management, LLC
EIAWD
689.4 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2002
Operating Since
Location
Coordinates
45.7935, -119.3130
County
Umatilla, OR
Nearby Plants
- Hermiston Generating PlantNatural Gas621.2 MW · 4.6 km
- Four Corners Windfarm LLCWind8 MW · 10.9 km
- Oregon Trail Windfarm LLCWind9.9 MW · 11.5 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Hermiston Power Partnership | Hermiston Power Partnership | — |
| Owner(s) | Hermiston Power Partnership | Hermiston Power Partnership | — |
| Status | Operating | — | — |
Ownership Chain
About
Hermiston Power Partnership is a 689.4 MW natural gas-fired combined cycle power plant located in Umatilla County, Oregon. The plant began operating in 2002 and consists of 3 generators. It is owned and operated by Hermiston Power Partnership. The plant is within the Western Electricity Coordinating Council (WECC) NERC region, and its balancing authority is Gridforce Energy Management, LLC.
In the most recent year of data, the plant generated 2,988,998 MWh of electricity, achieving a capacity factor of 49.8%. Hermiston Power Partnership is ranked as the largest of 10 natural gas plants in Oregon, and 325th out of 945 nationwide.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Gridforce Energy Management, LLC
Grid Voltage
500 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
323.4K MWh
Latest Month
3.0M MWh
Annual Generation
49.8%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
General
Hermiston among communities cited in study on data centers, energy use
Hermiston is featured in a recent study asserting Amazon's data centers aren't negatively affecting energy resources in the communities...
Tri-Cities Area Journal of Business·4 weeks ago
General
News | Amazon's quest for data center power leads to deal for Oregon project
Bankruptcy court approves tech giant's acquisition of solar power storage site.
CoStar·1 months ago
General
Hermiston, Amazon partner on underground water storage project
Amazon will fund an underground water storage project capable of storing up to 1.2 billion gallons of potable water for the city of...
Tri-Cities Area Journal of Business·3 months ago
General
Shutdown pauses carbon storage project in Hermiston
Basalt CarbonSAFE Project, Dan Eakin, University of Wyoming, Hermiston City Council, Calpine, climate change.
East Oregonian·5 months ago
Last updated 2026-03-26
View all 10 articles