Snoqualmie
King County, Washington · EIA plant ID 3860 · Operator: Puget Sound Energy Inc
Nameplate13MWSummer 12 MW
Generators5in service
Net generation59GWh12 mo to Dec 2025
Capacity factor56%hydro units, summer MW
Heat rate—thermal plants only
First online1898
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), hydro 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 | 241.6 | 383.0% | — |
| 2002 | 203.7 | 195.4% | — |
| 2003 | 117.1 | 112.4% | — |
| 2004 | 67.9 | 65.0% | — |
| 2005 | 51.5 | 49.4% | — |
| 2006 | 47.6 | 45.6% | — |
| 2007 | 52.1 | 50.0% | — |
| 2008 | 59.5 | 56.9% | — |
| 2009 | 62.8 | 60.2% | — |
| 2010 | 13.1 | 12.5% | — |
| 2013 | 0.6 | 0.8% | — |
| 2014 | 28.5 | 25.4% | — |
| 2015 | 17.8 | 15.9% | — |
| 2016 | 53.1 | 45.4% | — |
| 2017 | 60.9 | 57.5% | — |
| 2018 | 68.3 | 64.5% | — |
| 2019 | 48.6 | 45.8% | — |
| 2020 | 52.9 | 49.8% | — |
| 2021 | 32.6 | 30.8% | — |
| 2022 | 48.8 | 46.1% | — |
| 2023 | 61.9 | 58.4% | — |
| 2024 | 65.9 | 62.0% | — |
| 2025 | 59.2 | 55.8% | — |
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 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jan 1898 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jan 1898 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jan 1898 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jan 1898 | Operating | — | coming soon |
| 5A | Conventional Hydroelectric | HY | 6.8 | 6.1 | Aug 2013 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 5.6 | 6.5 | Dec 1905 | Retired Apr 2010 | — | coming soon |
Owner / operator
Operator: Puget Sound Energy Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Puget Sound Energy Inc | 100.0% | 13 MW |
Nearby plants
Within 80 km.
| Snoqualmie 2 | 39 MW | 0.6 km |
| Black Creek | 4 MW | 10.5 km |
| Hancock Creek Hydroelectric Project | 6 MW | 11.6 km |
| Calligan Creek Hydroelectric Project | 6 MW | 13 km |
| Cedar Falls (WA) | 30 MW | 14.1 km |
| Twin Falls Hydro | 24 MW | 15.4 km |