Hermiston Generating Plant — Plant Summary
- EIA Plant ID
- 54761
- Capacity
- 621.2 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Umatilla, OR
- Operating Since
- 1996
- Generators
- 4
- Operator
- Hermiston Generating Co LP
- Parent Company
- Sumitomo
- Annual Generation
- 2,997,886 MWh
- Capacity Factor
- 55.2%
- Balancing Authority
- PacifiCorp - West
- ISO/RTO
- —
- NERC Region
- WECC
Hermiston Generating Plant
OperatingNatural Gas
Ranked #2 of 13 Natural Gas plants in OR#375 of 2009 nationally
621.2 MW Natural Gas operating in Umatilla, OR — PacifiCorp - West
EIAWD
621.2 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combined Cycle
Technology
1996
Operating Since
Location
Coordinates
45.8042, -119.3700
County
Umatilla, OR
Nearby Plants
- Hermiston Power PartnershipNatural Gas689.4 MW · 4.6 km
- Four Corners Windfarm LLCWind8 MW · 9.2 km
- Oregon Trail Windfarm LLCWind9.9 MW · 10.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Hermiston Generating Co LP | Hermiston Generating Company | — |
| Owner(s) | Hermiston Generating Co LP, PacifiCorp | Sumitomo | — |
| Status | Operating | — | — |
Ownership Chain
About
Hermiston Generating Plant is a 621.2 MW natural gas-fired combined cycle power plant located in Umatilla County, Oregon. The plant began operating in 1996 and consists of 4 generators. It is owned by Sumitomo, a company based in Japan, and operated by Hermiston Generating Co LP. The plant is interconnected to the PacifiCorp - West balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, Hermiston Generating Plant produced 2,997,886 MWh of electricity, operating at a capacity factor of 55.2%. According to available data, the plant ranks as the second largest of 10 power plants in Oregon and 379th out of 945 plants nationally. Financial data indicates an installed cost of $633.18 per kW, based on information reported to FERC.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
PacifiCorp - West
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP CHP
Generation
163.1K MWh
Latest Month
3.0M MWh
Annual Generation
55.2%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$671/kW
Installed Cost
$30.8/MWh
Operating Cost
PacifiCorp
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (3)Beta
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