Sumas Power Plant — Plant Summary
- EIA Plant ID
- 54476
- Capacity
- 125.5 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Whatcom, WA
- Operating Since
- 1993
- Generators
- 2
- Operator
- Puget Sound Energy Inc
- Parent Company
- PUGET HOLDINGS
- Annual Generation
- 675,821 MWh
- Capacity Factor
- 61.2%
- Balancing Authority
- Puget Sound Energy
- ISO/RTO
- —
- NERC Region
- WECC
Sumas Power Plant
OperatingNatural Gas
Ranked #13 of 16 Natural Gas plants in WA#869 of 2009 nationally
125.5 MW Natural Gas operating in Whatcom, WA — Puget Sound Energy
EIAWD
125.5 MW
Nameplate Capacity
2
Generators
units
Natural Gas Fired Combined Cycle
Technology
1993
Operating Since
Location
Coordinates
48.9902, -122.2738
County
Whatcom, WA
Nearby Plants
- Glacier Battery StorageBESS2 MW · 26.5 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Puget Sound Energy Inc | Puget Sound Energy | — |
| Owner(s) | Puget Sound Energy Inc | PUGET HOLDINGS | — |
| Status | Operating | — | — |
Ownership Chain
About
The Sumas Power Plant is a 125.5 MW natural gas-fired combined cycle facility located in Whatcom County, Washington. The plant began operating in 1993 and consists of two generators. It is owned by PUGET HOLDINGS and operated by Puget Sound Energy Inc. The plant is within the Puget Sound Energy balancing authority and the WECC NERC region.
In the most recent year with available data, the Sumas Power Plant generated 675,821 MWh, achieving a capacity factor of 61.2%. According to available rankings, the plant is the 13th largest in Washington state out of 13 plants, and 867th nationally out of 945 plants. Financial data indicates an installed cost of $567.48 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Puget Sound Energy
Grid Voltage
115 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
90.8K MWh
Latest Month
675.8K MWh
Annual Generation
61.2%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$683/kW
Installed Cost
$37.3/MWh
Operating Cost
Puget Sound Energy, Inc.
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (7)Beta
General
Amazon wins bidding for giant Sunstone solar project in Oregon
Amazon outbid Puget Sound Energy with $83M for Oregon's Sunstone solar project to help power its growing data center operations in the...
The Business Journals·2 months ago
Hazards·flooding
Live updates: Tens of thousands still without power in Western Washington with more wind ahead
Flood waters are receding Thursday, but a flood watch remains in effect for several Western Washington counties. Meanwhile, farmers continue to assess...
KUOW·3 months ago
Hazards·flooding
LIVE UPDATES: Evacuations, major river flooding across western WA
Severe flooding is expected across western Washington as rivers hit record levels, leading to widespread evacuations and road closures.
western WA (other)Washington (other)
FOX 13 Seattle·3 months ago
General
Washington’s last coal power plant will transition to natural gas
The facility was set to close this year. A deal TransAlta announced with Puget Sound Energy on Tuesday will keep it producing power with a...
Washington State Standard·3 months ago
Last updated 2026-03-26
View all 7 articles