106th largest plant in Alaska · 10186th nationally
Silvis is a hydroelectric power plant in Alaska with a nameplate capacity of 2.1 MW. It generates roughly 11.5k MWh per year — enough to power about 1,091 average U.S. homes.
Its capacity factor of 62% puts it in the middle range — running steadily but not full-time.
| Plant Name | Silvis |
|---|---|
| Operator | Ketchikan Public Utilities |
| City | Ketchikan |
| County | Ketchikan Gateway County |
| State | Alaska |
| ZIP | 99901 |
| Coordinates | 55.38140, -131.51776 |
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 | 2.1 MW | Operating | 1968 |
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.