Cosmo Specialty Fibers Plant
Other power plant · Grays Harbor County, Washington
Nameplate capacity
15 MW
Rank in Washington
#91
of 139 plants
In service since
1957
January 1957
Details
- Primary fuel
- Other
- Technology
- Wood/Wood Waste Biomass
- Operator
- Cosmo Specialty Fibers
- County
- Grays Harbor County
- Generating units
- 2
- Share of state capacity
- 0.05%
- Rank among other plants in Washington
- #7 of 16
- EIA plant code
- 50185
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| TG1 | Wood/Wood Waste Biomass | 7.5 MW | 8.5 MW | 1957 | Out of service but expected to return to service in next calendar year |
| TG2 | Wood/Wood Waste Biomass | 7.5 MW | 8.5 MW | 1957 | Out of service but expected to return to service in next calendar year |
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
| Upriver Dam Hydro Plant | Hydro | 18 MW |
| South Fork Tolt | Hydro | 17 MW |
| University of Washington Power Plant | Natural gas | 15 MW |
| Monroe Street | Hydro | 15 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 15 MW solar plant and a 15 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