Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/54476
EIA plant 54476
Sumas · Whatcom · WA
Sumas Power Plant
Operated by Puget Sound Energy Inc
Published location
Where is Sumas Power Plant?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
48.990500, -122.273300
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Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the WA plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
193,881
287,219
369,931
40
50
620,778
753,453
879,965
926,096
1069,677
1184,066
1290,755
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 93,881 |
| 2 | 87,219 |
| 3 | 69,931 |
| 4 | 0 |
| 5 | 0 |
| 6 | 20,778 |
| 7 | 53,453 |
| 8 | 79,965 |
| 9 | 26,096 |
| 10 | 69,677 |
| 11 | 84,066 |
| 12 | 90,755 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 93,881 MWh |
| 2 | 87,219 MWh |
| 3 | 69,931 MWh |
| 4 | 0 MWh |
| 5 | 0 MWh |
| 6 | 20,778 MWh |
| 7 | 53,453 MWh |
| 8 | 79,965 MWh |
| 9 | 26,096 MWh |
| 10 | 69,677 MWh |
| 11 | 84,066 MWh |
| 12 | 90,755 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | NG | 87.8 | OP |
| GEN2 | Natural Gas Fired Combined Cycle | NG | 37.7 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
54476
Sector
Electric Utility
Water source
Municipality
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Sumas Power Plant power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Sumas Power Plant
Variation in the published months
Across 12 numeric monthly generation entries, 1 has the highest recorded value (93,881 MWh) and 4, 5 the lowest (0 MWh). Their difference is 93,881 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | 87.8 | 84.7 | 96.5 | 50.0 |
| GEN2 | Natural Gas Fired Combined Cycle | 37.7 | 40.8 | 40.8 | 20.0 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.