West Point Treatment Plant
King County, Washington · EIA plant ID 50329 · Operator: King County Dept-Natural Res
Nameplate5MWSummer 5 MW
Generators2in service
Net generation14GWh12 mo to Dec 2025
Capacity factor36%other units, summer MW
Heat rate—thermal plants only
First online2012
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), other 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) |
|---|---|---|---|
| 2001 | 11.9 | 34.9% | — |
| 2002 | 14.5 | 42.5% | — |
| 2003 | 14.3 | 41.9% | — |
| 2004 | 7.5 | 21.9% | — |
| 2005 | 5.9 | 17.2% | — |
| 2006 | 6.8 | 20.0% | — |
| 2007 | 0 | 0.0% | — |
| 2012 | 0.2 | 0.8% | — |
| 2013 | 6.5 | 16.2% | — |
| 2014 | 16.9 | 41.9% | — |
| 2015 | 15.9 | 39.4% | — |
| 2016 | 15.7 | 39.0% | — |
| 2017 | 9.5 | 23.6% | — |
| 2018 | 12.5 | 31.0% | — |
| 2019 | 15 | 37.1% | — |
| 2020 | 13.1 | 32.4% | — |
| 2021 | 10.7 | 26.5% | — |
| 2022 | 10.2 | 25.2% | — |
| 2023 | 7.2 | 17.9% | — |
| 2024 | 9.6 | 23.7% | — |
| 2025 | 14.3 | 35.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 4 | Other Waste Biomass | IC | 2.3 | 2.3 | Jun 2012 | Operating | — | coming soon |
| 5 | Other Waste Biomass | IC | 2.3 | 2.3 | Jun 2012 | Operating | — | coming soon |
| 1 | Other Waste Biomass | IC | 1.3 | 1.3 | Jun 1983 | Retired Apr 2007 | — | coming soon |
| 2 | Other Waste Biomass | IC | 1.3 | 1.3 | Jun 1983 | Retired Apr 2007 | — | coming soon |
| 3 | Other Waste Biomass | IC | 1.3 | 1.3 | Jun 1983 | Retired Jan 2007 | — | coming soon |
Owner / operator
Operator: King County Dept-Natural Res. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| King County Dept-Natural Res | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| University of Washington Power Plant | 15 MW | 10.7 km |
| AGATE BESS | — | 17 km |
| MESA 1 | retired | 34 km |
| Rocky Brook Hydroelectric | 2 MW | 37.7 km |
| Cedar Hills | 5 MW | 37.9 km |
| MESA 2 | retired | 39.3 km |