H M Jackson
Snohomish County, Washington · EIA plant ID 7588 · Operator: PUD 1 of Snohomish County
Nameplate112MWSummer 96 MW
Generators4in service
Net generation334GWh12 mo to Dec 2025
Capacity factor40%hydro units, summer MW
Heat rate—thermal plants only
First online1984
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) |
|---|---|---|---|
| 2002 | 452.7 | 53.8% | — |
| 2003 | 407.8 | 48.5% | — |
| 2004 | 409.5 | 48.6% | — |
| 2005 | 303.3 | 36.1% | — |
| 2006 | 417.3 | 49.6% | — |
| 2007 | 431.3 | 51.3% | — |
| 2008 | 457.5 | 54.3% | — |
| 2009 | 394.2 | 46.9% | — |
| 2010 | 382.6 | 45.5% | — |
| 2011 | 485.8 | 57.8% | — |
| 2012 | 520.3 | 61.7% | — |
| 2013 | 452.1 | 53.8% | — |
| 2014 | 514.3 | 61.2% | — |
| 2015 | 371.6 | 44.2% | — |
| 2016 | 483.8 | 57.4% | — |
| 2017 | 453.2 | 53.9% | — |
| 2018 | 459.5 | 54.6% | — |
| 2019 | 306.3 | 36.4% | — |
| 2020 | 486.4 | 57.7% | — |
| 2021 | 443.2 | 52.7% | — |
| 2022 | 408.9 | 48.6% | — |
| 2023 | 298 | 35.4% | — |
| 2024 | 365.7 | 43.4% | — |
| 2025 | 333.6 | 39.7% | — |
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 | 47.5 | 41 | Jun 1984 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 47.5 | 41 | Jun 1984 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 8.4 | 7 | Jun 1984 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 8.4 | 7 | Jun 1984 | Operating | — | coming soon |
Owner / operator
Operator: PUD 1 of Snohomish County. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PUD 1 of Snohomish County | 100.0% | 112 MW |
Nearby plants
Within 80 km.
| Youngs Creek Hydroelectric Project | 8 MW | 13 km |
| South Fork Tolt | 17 MW | 23.4 km |
| MESA 2 | retired | 29.5 km |
| MESA 1 | retired | 32.4 km |
| Calligan Creek Hydroelectric Project | 6 MW | 35.5 km |
| Arlington Battery Energy Storage System | — | 36.9 km |