Grays Harbor Energy Facility
Natural gas power plant · Grays Harbor County, Washington
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Invenergy Services LLC
- County
- Grays Harbor County
- Generating units
- 3
- Share of state capacity
- 2.25%
- Rank among natural gas plants in Washington
- #1 of 16
- EIA plant code
- 7999
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ST1 | Natural Gas Fired Combined Cycle | 317 MW | 291 MW | 2008 | Operating |
| CT1 | Natural Gas Fired Combined Cycle | 199 MW | 151 MW | 2008 | Operating |
| CT2 | Natural Gas Fired Combined Cycle | 199 MW | 153 MW | 2008 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Washington
| Lower Monumental | Hydro | 810 MW |
| Transalta Centralia Generation | Coal | 730 MW |
| Rock Island | Hydro | 629 MW |
| Ice Harbor | Hydro | 603 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 715 MW solar plant and a 715 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Washington power plants · What Washington actually generates