Skookumchuck
Hydro power plant · Thurston County, Washington
Nameplate capacity
1.0 MW
Rank in Washington
#139
of 139 plants
In service since
1990
September 1990
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- TransAlta Centralia Gen LLC
- County
- Thurston County
- Generating units
- 1
- Share of state capacity
- 0.00%
- Rank among hydro plants in Washington
- #73 of 73
- EIA plant code
- 7259
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 1.0 MW | 1.0 MW | 1990 | 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
| Lilliwaup Falls Generating | Hydro | 1.4 MW |
| Biotech LS 0836 | Other | 1.0 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 1.0 MW solar plant and a 1.0 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