Seattle City Light
Balancing Authority Summary Information
Seattle City Light is ranked #48 out of 64 balancing authorities in terms of total annual electricity generation.
| Balancing Authority | Seattle City Light |
|---|---|
| States | Washington |
| Last Update | Aug 2026 |
| Annual Generation | 6.7 TWh |
| Power Plants | 9 |
| Utilities | 3 |
| Ranked #48 out of 64 in terms of net annual generation | |
| Ranked #48 out of 64 in terms of annual generation from all | |
| 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 |
|---|---|---|---|---|---|---|
| West Point Treatment Plant | King County Dept-Natural Res - (WA) | Seattle, WA | 14 GWh | May 2012 | Dec 2025 | Other Biomass Gas |
| University of Washington Power Plant | University of Washington | Seattle, WA | 127 MWh | Dec 1968 | Jun 2026 | Distillate Fuel Oil |
| Ross | City of Seattle - (WA) | Rockport, WA | 750 GWh | Nov 1952 | Jun 2026 | Water |
| Gorge | City of Seattle - (WA) | Rockport, WA | 939 GWh | Aug 1924 | Jun 2026 | Water |
| Diablo | City of Seattle - (WA) | Rockport, WA | 518 GWh | Sep 1936 | Dec 2025 | Water |
| South Fork Tolt | City of Seattle - (WA) | North Bend, WA | 49 GWh | Oct 1995 | Dec 2025 | Water |
| Cedar Falls (WA) | City of Seattle - (WA) | North Bend, WA | 54 GWh | Oct 1921 | Dec 2025 | Water |
| Boundary | City of Seattle - (WA) | Metaline, WA | 4 TWh | Jul 1967 | Jun 2026 | Water |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #45 | Avangrid Renewables, LLC | 8.8 TWh | 19 |
| #44 | Avista Corporation | 9.2 TWh | 33 |
| #16 | Bonneville Power Administration | 91.5 TWh | 167 |
| #56 | City of Tacoma, Department of Public Utilities, Light Division | 2.4 TWh | 9 |
| #34 | Gridforce Energy Management, LLC | 16.2 TWh | 1 |
| #41 | PacifiCorp West | 9.7 TWh | 140 |
| #47 | Portland General Electric Company | 6.9 TWh | 109 |
| #43 | Public Utility District No. 1 of Chelan County | 9.4 TWh | 4 |
| #39 | Public Utility District No. 2 of Grant County, Washington | 10.5 TWh | 5 |
| #52 | Puget Sound Energy, Inc. | 4.3 TWh | 40 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #43 | Public Utility District No. 1 of Chelan County | 9.4 TWh | 4 |
| #44 | Avista Corporation | 9.2 TWh | 33 |
| #45 | Avangrid Renewables, LLC | 8.8 TWh | 19 |
| #46 | El Paso Electric Company | 7.3 TWh | 37 |
| #47 | Portland General Electric Company | 6.9 TWh | 109 |
| #48 | Seattle City Light | 6.7 TWh | 9 |
| #49 | Imperial Irrigation District | 6.3 TWh | 66 |
| #50 | Duke Energy Progress West | 4.5 TWh | 15 |
| #51 | PUD No. 1 of Douglas County | 4.4 TWh | 4 |
| #52 | Puget Sound Energy, Inc. | 4.3 TWh | 40 |