Skookumchuck Wind Facility
Thurston County, Washington · EIA plant ID 63205 · Operator: Southern Power Co
Nameplate136MWSummer 137 MW
Generators1in service
Net generation406GWh12 mo to Aug 2026
Capacity factor34%wind units, summer MW
Heat rate—thermal plants only
First online2020
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), wind units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2020 | 76.4 | 38.1% | — |
| 2021 | 414.3 | 34.6% | — |
| 2022 | 312.4 | 26.1% | — |
| 2023 | 415 | 34.6% | — |
| 2024 | 416.9 | 34.7% | — |
| 2025 | 392.8 | 32.8% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Onshore Wind Turbine | WT | 136 | 136.8 | Nov 2020 | Operating | — | vestas V136-3.45 |
Owner / operator
Operator: Southern Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Skookumchuck Wind Energy Project, LLC | 100.0% | 136 MW |
Nearby plants
Within 80 km.
| Skookumchuck | 1 MW | 8.5 km |
| Yelm | 12 MW | 14 km |
| Transalta Centralia Generation | 730 MW | 18.2 km |
| Centralia Battery Energy Storage System | — | 18.5 km |
| LaGrande | 64 MW | 26.3 km |
| Alder | 51 MW | 27.5 km |