Darrington
Snohomish County, Washington · EIA plant ID 57969 · Operator: Hampton Lumber Mills - Washington Inc
Nameplate5MWSummer 5 MW
Generators1in service
Net generation12GWh12 mo to Dec 2025
Capacity factor31%other units, summer MW
Heat rate—thermal plants only
First online2007
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) |
|---|---|---|---|
| 2011 | 13.6 | 34.5% | — |
| 2012 | 14 | 35.5% | — |
| 2013 | 18.8 | 47.8% | — |
| 2014 | 19 | 48.2% | — |
| 2015 | 17.8 | 45.0% | — |
| 2016 | 19.1 | 48.3% | — |
| 2017 | 17.9 | 45.4% | — |
| 2018 | 16.9 | 43.0% | — |
| 2019 | 16.8 | 42.6% | — |
| 2020 | 16.3 | 41.3% | — |
| 2021 | 15.5 | 39.4% | — |
| 2022 | 16.6 | 42.1% | — |
| 2023 | 16 | 40.5% | — |
| 2024 | 17 | 43.1% | — |
| 2025 | 12.3 | 31.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Wood/Wood Waste Biomass | ST | 4.5 | 4.5 | Feb 2007 | Operating | — | coming soon |
Owner / operator
Operator: Hampton Lumber Mills - Washington Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Hampton Lumber Mills - Washington Inc | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| Lower Baker | 104 MW | 32.6 km |
| Arlington Battery Energy Storage System | — | 42.2 km |
| Arlington Microgrid | 2 MW | 42.7 km |
| Upper Baker | 105 MW | 42.7 km |
| H M Jackson | 112 MW | 43.2 km |
| Koma Kulshan Associates | 12 MW | 46.5 km |