113th largest plant in Arizona · 5319th nationally
Stewart Mountain is a hydroelectric power plant in Arizona with a nameplate capacity of 13.0 MW. It generates roughly 35.0k MWh per year — enough to power about 3,331 average U.S. homes.
Its capacity factor of 31% reflects intermittent or peaking operation.
| Plant Name | Stewart Mountain |
|---|---|
| Operator | Salt River Project |
| City | Phoenix |
| County | Maricopa County |
| State | Arizona |
| ZIP | 85072 |
| Coordinates | 33.56610, -111.53600 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| SM | Conventional Hydroelectric | Water | 13.0 MW | Operating | 1930 |
| NERC Region | WECC |
|---|---|
| Balancing Authority | Salt River Project |
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.