Sumas Power Plant
Natural gas power plant · Whatcom County, Washington
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Puget Sound Energy Inc
- County
- Whatcom County
- Generating units
- 2
- Share of state capacity
- 0.40%
- Rank among natural gas plants in Washington
- #13 of 16
- EIA plant code
- 54476
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | 88 MW | 85 MW | 1993 | Operating |
| GEN2 | Natural Gas Fired Combined Cycle | 38 MW | 41 MW | 1993 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Washington
| Skookumchuck Wind Facility | Wind | 136 MW |
| Yale | Hydro | 134 MW |
| H M Jackson | Hydro | 112 MW |
| Palouse | Wind | 105 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 126 MW solar plant and a 126 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Washington power plants · What Washington actually generates