Seattle City Light
Balancing Authority Summary Information
Seattle City Light is ranked #51 out of 65 balancing authorities in terms of total annual electricity generation.
| Balancing Authority | Seattle City Light |
|---|---|
| States | Washington |
| Last Update | Nov 2025 |
| Annual Generation | 4.5 TWh |
| Power Plants | 9 |
| Utilities | 3 |
| Ranked #51 out of 65 in terms of net annual generation | |
| Ranked #19 out of 47 in terms of annual generation from water | |
| Power Plant Types | Water | 100% |
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Daily Net Generation for Seattle City Light for the past 3 Years
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| University of Washington Power Plant | University of Washington | Seattle, WA | 4 GWh | Dec 1968 | Sep 2025 | Natural Gas : 97.1% Distillate Fuel Oil : 2.9% |
| Boundary | City of Seattle - (WA) | Metaline, WA | 3 TWh | Jul 1967 | Aug 2025 | Water |
| Ross | City of Seattle - (WA) | Rockport, WA | 401 GWh | Nov 1952 | Jul 2025 | Water |
| Gorge | City of Seattle - (WA) | Rockport, WA | 715 GWh | Aug 1924 | Jul 2025 | Water |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | 45 GWh | Oct 1995 | Dec 2024 | Water |
| Cedar Falls (WA) | City of Seattle - (WA) | North Bend, WA | 6 GWh | Oct 1921 | Dec 2024 | Water |
| Diablo | City of Seattle - (WA) | Rockport, WA | 361 GWh | Sep 1936 | Dec 2024 | Water |
| West Point Treatment Plant | King County Dept-Natural Res | Seattle, WA | 10 GWh | May 2012 | Dec 2024 | Other Biomass Gas |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #43 | Avangrid Renewables, LLC | 8.3 TWh | 19 |
| #42 | Avista Corporation | 8.3 TWh | 33 |
| #16 | Bonneville Power Administration | 80.5 TWh | 163 |
| #57 | City of Tacoma, Department of Public Utilities, Light Division | 2.1 TWh | 9 |
| #33 | Gridforce Energy Management, LLC | 18.3 TWh | 1 |
| #50 | PacifiCorp West | 5.0 TWh | 136 |
| #44 | Portland General Electric Company | 8.2 TWh | 108 |
| #45 | Public Utility District No. 1 of Chelan County | 7.7 TWh | 4 |
| #41 | Public Utility District No. 2 of Grant County, Washington | 8.5 TWh | 5 |
| #48 | Puget Sound Energy, Inc. | 6.2 TWh | 40 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #46 | El Paso Electric Company | 6.8 TWh | 32 |
| #47 | Imperial Irrigation District | 6.3 TWh | 66 |
| #48 | Puget Sound Energy, Inc. | 6.2 TWh | 40 |
| #49 | Southwestern Power Administration | 5.2 TWh | 34 |
| #50 | PacifiCorp West | 5.0 TWh | 136 |
| #51 | Seattle City Light | 4.5 TWh | 9 |
| #52 | Duke Energy Progress West | 4.3 TWh | 10 |
| #53 | PUD No. 1 of Douglas County | 3.7 TWh | 3 |
| #54 | Arlington Valley, LLC | 3.4 TWh | 1 |
| #55 | City of Tallahassee | 3.1 TWh | 5 |