Nameplate capacity
12 MW
Rank in Washington
#101
of 139 plants
In service since
1930
December 1930
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Centralia - (WA)
- County
- Thurston County
- Generating units
- 3
- Share of state capacity
- 0.04%
- Rank among hydro plants in Washington
- #51 of 73
- EIA plant code
- 3878
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | 6.0 MW | 6.0 MW | 1955 | Operating |
| 1 | Conventional Hydroelectric | 3.0 MW | 2.7 MW | 1930 | Operating |
| 2 | Conventional Hydroelectric | 3.0 MW | 2.7 MW | 1930 | 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
| Chandler | Hydro | 12 MW |
| Koma Kulshan | Hydro | 12 MW |
| McNary Dam Fish Attraction Project | Hydro | 10 MW |
| Upper Falls | Hydro | 10 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 12 MW solar plant and a 12 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