Nameplate capacity
300 MW
Rank in Washington
#23
of 139 plants
In service since
1968
October 1968
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Tacoma - (WA)
- County
- Lewis County
- Generating units
- 2
- Share of state capacity
- 0.95%
- Rank among hydro plants in Washington
- #14 of 73
- EIA plant code
- 3918
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 51 | Conventional Hydroelectric | 150 MW | 186 MW | 1968 | Operating |
| 52 | Conventional Hydroelectric | 150 MW | 157 MW | 1968 | 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
| Frederickson Power LP | Natural gas | 318 MW |
| Goldendale Generating Station | Natural gas | 303 MW |
| Ferndale Generating Station | Natural gas | 286 MW |
| Wild Horse | Wind | 273 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 300 MW solar plant and a 300 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