West Point Treatment Plant
Biomass power plant in King County, Washington. 4.6 MW of nameplate capacity across 2 generators, operated by King County Dept-Natural Res - (WA).
Also known as EIA plant 50329
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 4.6 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- June 2012First generator online
- Operator
- King County Dept-Natural Res - (WA)EIA operator ID 10004
- Grid
- SCLBalancing authority SCL
- Price nodes
- None linkedNo verified ISO node
- Location
- King County, WA47.6611, −122.4464
- EIA plant ID
- 50329EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power West Point Treatment Plant produces
Free · EIA-923Net generation, 2025
14.3 GWh
14,336 MWh, final
Capacity factor, 2025
35.6%
2024: 23.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
7.2–15.9
GWh a year. Low 2023, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 11,916 | Not reported | 12 of 12 |
| 2002 | 14,538 | Not reported | 12 of 12 |
| 2003 | 14,333 | Not reported | 12 of 12 |
| 2004 | 7,504 | Not reported | 12 of 12 |
| 2005 | 5,889 | Not reported | 12 of 12 |
| 2006 | 6,843 | Not reported | 12 of 12 |
| 2007 | 1 | Not reported | 12 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | 194 | Not reported | 7 of 12 |
| 2013 | 6,506 | 16.1% | 12 of 12 |
| 2014 | 16,881 | 41.9% | 12 of 12 |
| 2015 | 15,865 | 39.4% | 12 of 12 |
| 2016 | 15,744 | 39.0% | 12 of 12 |
| 2017 | 9,530 | 23.6% | 12 of 12 |
| 2018 | 12,504 | 31.0% | 12 of 12 |
| 2019 | 14,971 | 37.2% | 12 of 12 |
| 2020 | 13,105 | 32.4% | 12 of 12 |
| 2021 | 10,657 | 26.4% | 12 of 12 |
| 2022 | 10,165 | 25.2% | 12 of 12 |
| 2023 | 7,214 | 17.9% | 12 of 12 |
| 2024 | 9,565 | 23.7% | 12 of 12 |
| 2025 | 14,336 | 35.6% | 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.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 4 | Other Waste Biomass | 2.3 | June 2012 |
| 5 | Other Waste Biomass | 2.3 | June 2012 |
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 King County Dept-Natural Res - (WA) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about West Point Treatment Plant
How much power does West Point Treatment Plant produce?
West Point Treatment Plant reported 14,336 MWh (14.3 GWh) of net generation in 2025, a 35.6% capacity factor on 4.6 MW of nameplate capacity.
Where is West Point Treatment Plant?
West Point Treatment Plant is in King County, Washington, at 47.6611, −122.4464. It is in the Seattle City Light balancing area (SCL).
Who operates West Point Treatment Plant?
EIA-860M for August 2026 lists King County Dept-Natural Res - (WA) as the operator (EIA operator ID 10004). The operator is not always the owner.
When did West Point Treatment Plant start operating?
Its first generator began operating in June 2012, 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