Skookumchuck
Hydro power plant in Thurston County, Washington. 1 MW of nameplate capacity across 1 generator, operated by TransAlta Centralia Gen LLC.
Also known as EIA plant 7259
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- September 1990First generator online
- Operator
- TransAlta Centralia Gen LLCEIA operator ID 19099
- Grid
- BPATBalancing authority BPAT
- Price nodes
- None linkedNo verified ISO node
- Location
- Thurston County, WA46.7844, −122.7197
- EIA plant ID
- 7259EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Skookumchuck produces
Free · EIA-923Net generation, 2025
266 MWh
266 MWh, final
Capacity factor, 2025
3.0%
2024: 24.6%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.3–6.3
GWh a year. Low 2025, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 0 | Not reported | 12 of 12 |
| 2002 | 801 | Not reported | 12 of 12 |
| 2003 | 716 | Not reported | 12 of 12 |
| 2004 | 209 | Not reported | 12 of 12 |
| 2005 | 0 | Not reported | 12 of 12 |
| 2006 | 0 | Not reported | 12 of 12 |
| 2007 | 0 | Not reported | 12 of 12 |
| 2008 | 0 | Not reported | 12 of 12 |
| 2009 | 0 | Not reported | 12 of 12 |
| 2010 | 0 | 0.0% | 12 of 12 |
| 2011 | 5,092 | 58.1% | 12 of 12 |
| 2012 | 6,314 | 71.9% | 12 of 12 |
| 2013 | 6,768 | 77.3% | 12 of 12 |
| 2014 | 6,469 | 73.8% | 12 of 12 |
| 2015 | 4,849 | 55.4% | 12 of 12 |
| 2016 | 4,451 | 50.7% | 12 of 12 |
| 2017 | 6,320 | 72.1% | 12 of 12 |
| 2018 | 3,280 | 37.4% | 12 of 12 |
| 2019 | 2,318 | 26.5% | 12 of 12 |
| 2020 | 4,476 | 51.0% | 12 of 12 |
| 2021 | 4,559 | 52.0% | 12 of 12 |
| 2022 | 4,190 | 47.8% | 12 of 12 |
| 2023 | 3,244 | 37.0% | 12 of 12 |
| 2024 | 2,157 | 24.6% | 12 of 12 |
| 2025 | 266 | 3.0% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 1.0 | September 1990 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists TransAlta Centralia Gen LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Skookumchuck
More plants operated by TransAlta Centralia Gen LLC
Questions about Skookumchuck
How much power does Skookumchuck produce?
Skookumchuck reported 266 MWh (266 MWh) of net generation in 2025, a 3.0% capacity factor on 1 MW of nameplate capacity.
Where is Skookumchuck?
Skookumchuck is in Thurston County, Washington, at 46.7844, −122.7197. It is in the Bonneville Power Administration balancing area (BPAT).
Who operates Skookumchuck?
EIA-860M for August 2026 lists TransAlta Centralia Gen LLC as the operator (EIA operator ID 19099). The operator is not always the owner.
When did Skookumchuck start operating?
Its first generator began operating in September 1990, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page