Nameplate capacity
182 MW
Rank in Washington
#34
of 139 plants
In service since
1936
October 1936
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Seattle - (WA)
- County
- Whatcom County
- Generating units
- 4
- Share of state capacity
- 0.58%
- Rank among hydro plants in Washington
- #17 of 73
- EIA plant code
- 6432
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 31 | Conventional Hydroelectric | 90 MW | 90 MW | 1937 | Operating |
| 32 | Conventional Hydroelectric | 90 MW | 90 MW | 1936 | Operating |
| 35 | Conventional Hydroelectric | 1.2 MW | 1.2 MW | 1936 | Operating |
| 36 | Conventional Hydroelectric | 1.2 MW | 1.2 MW | 1936 | 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
| White Creek Wind Farm | Wind | 204 MW |
| Big Horn Wind Project | Wind | 199 MW |
| Frederickson | Natural gas | 178 MW |
| FPL Energy Vansycle LLC (WA) | Wind | 177 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 182 MW solar plant and a 182 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