Transalta Centralia Generation
Coal power plant · Lewis County, Washington
Nameplate capacity
730 MW
Rank in Washington
#12
of 139 plants
In service since
1973
July 1973
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- TransAlta Centralia Gen LLC
- County
- Lewis County
- Generating units
- 1
- Share of state capacity
- 2.30%
- Rank among coal plants in Washington
- #1 of 1
- EIA plant code
- 3845
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Conventional Steam Coal | 730 MW | 670 MW | 1973 | 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
| Lower Granite | Hydro | 810 MW |
| Lower Monumental | Hydro | 810 MW |
| Grays Harbor Energy Facility | Natural gas | 715 MW |
| Rock Island | Hydro | 629 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 730 MW solar plant and a 730 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