Power plants in Lewis County, Washington
6 operating power plants in Lewis County, Washington, with 1,883 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Plants
6
Nameplate capacity
1,883 MW
Net generation, 2025
7.26 TWh
Largest power plants in Lewis County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Transalta Centralia GenerationCoal | 730 | 3,150 | 49.3% |
| 2 | Chehalis Generating FacilityNatural gas | 593 | 2,337 | 45.0% |
| 3 | MossyrockHydro | 300 | 903 | 34.3% |
| 4 | MayfieldHydro | 162 | 603 | 42.5% |
| 5 | Cowlitz FallsHydro | 70 | 196 | 31.9% |
| 6 | PackwoodHydro | 28 | 73.8 | 30.7% |
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
More power plant lists for Washington
Largest power plants in Washington50 plants · 27,210 MWSolar farms in Washington9 plants · 348 MWWind farms in Washington23 plants · 3,387 MWBattery storage projects in Washington3 projects · 4 MWNatural gas power plants in Washington14 plants · 3,657 MWHydroelectric power plants in Washington68 plants · 19,757 MW