Sumas Power Plant
Whatcom County, Washington · EIA plant ID 54476 · Operator: Puget Sound Energy Inc
Nameplate126MWSummer 126 MW
Generators2in service
Net generation398GWh12 mo to Dec 2025
Capacity factor36%gas/coal/oil units, summer MW
Heat rate8,467Btu/kWhfossil units, electric fuel, HHV
First online1993Runs as baseload
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1,101.7 | — | — |
| 2002 | 854.7 | — | — |
| 2003 | 924.4 | 84.1% | 8,119 |
| 2004 | 1,027 | 93.2% | 7,935 |
| 2005 | 1,001.1 | 91.1% | 7,935 |
| 2006 | 594.7 | 54.1% | 7,935 |
| 2007 | 228.9 | 20.8% | 7,262 |
| 2008 | 213.2 | 19.7% | 8,588 |
| 2009 | 602.3 | 55.9% | 7,534 |
| 2010 | 285.8 | 26.0% | 12,266 |
| 2011 | 180.7 | 16.4% | 8,559 |
| 2012 | 225.7 | 20.5% | 8,804 |
| 2013 | 537.9 | 48.9% | 8,813 |
| 2014 | 446.1 | 40.6% | 7,866 |
| 2015 | 602.1 | 54.8% | 7,841 |
| 2016 | 395 | 35.8% | 8,504 |
| 2017 | 257.6 | 23.4% | 8,465 |
| 2018 | 272.9 | 24.8% | 8,491 |
| 2019 | 483.6 | 44.0% | 8,359 |
| 2020 | 477.3 | 43.3% | 8,495 |
| 2021 | 517.5 | 47.1% | 8,485 |
| 2022 | 459 | 41.8% | 8,469 |
| 2023 | 834.9 | 75.9% | 8,456 |
| 2024 | 675.8 | 61.3% | 8,463 |
| 2025 | 398.4 | 36.2% | 8,467 |
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 | Natural Gas Fired Combined Cycle | CT | 87.8 | 84.7 | Mar 1993 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combined Cycle | CA | 37.7 | 40.8 | Mar 1993 | Operating | — | 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% | 126 MW |
Nearby plants
Within 80 km.
| Glacier Battery Storage | 2 MW | 26.5 km |
| Encogen | 176 MW | 31.3 km |
| Nooksack Hydro | 2 MW | 34.8 km |
| Ferndale Generating Station | 286 MW | 35 km |
| Koma Kulshan Associates | 12 MW | 53 km |
| Upper Baker | 105 MW | 57.1 km |