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136 MW Wind operating in Thurston, WA
136 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2020
Operating Since
Coordinates
46.7138, -122.5817
County
Thurston, WA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Southern Power Co | Southern Power | — |
| Owner(s) | Skookumchuck Wind Energy Project, LLC | TransAlta | — |
| Status | Operating | operating | — |
The Skookumchuck Wind Facility is a 136 MW wind power plant located in Thurston County, Washington. The facility began operating in 2020 and utilizes one generator with onshore wind turbine technology. The wind farm is owned by TransAlta, a Canadian company, and operated by Southern Power Co. It interconnects to the grid within the Puget Sound Energy balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
The facility's primary fuel source is wind (WND). The wind turbines have a hub height of 82 meters and a rotor diameter of 136 meters. The turbines were manufactured by Vestas, model V136-3.6. In its most recent year of operation, the Skookumchuck Wind Facility generated 392,842 MWh of electricity, achieving a capacity factor of 33.0%. The plant ranks as the 13th largest of 17 wind facilities in Washington state, and 562nd out of 734 nationally.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Puget Sound Energy (PSEI)
Grid Voltage
345.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Investor-Owned Utility
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
57.3K MWh
Latest Month
392.8K MWh
Annual Generation
33.0%
Capacity Factor
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2020
$1,450/kW
Est. Construction Cost
Total estimated cost: $197.2M
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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