90th largest plant in Washington · 5025th nationally
South Fork Tolt is a hydroelectric power plant in Washington with a nameplate capacity of 16.8 MW. It generates roughly 30.1k MWh per year — enough to power about 2,869 average U.S. homes.
Its capacity factor of 20% reflects intermittent or peaking operation.
| Plant Name | South Fork Tolt |
|---|---|
| Operator | City Of Seattle - (Wa) |
| City | North Bend |
| County | King County |
| State | Washington |
| ZIP | 98045 |
| Coordinates | 47.69917, -121.78333 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | Water | 16.8 MW | Operating | 1995 |
| NERC Region | WECC |
|---|---|
| Balancing Authority | Seattle City Light |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.