73rd largest plant in Arizona · 3289th nationally
Mormon Flat is a hydroelectric power plant in Arizona with a nameplate capacity of 63.5 MW. It generates roughly 67.8k MWh per year — enough to power about 6,460 average U.S. homes.
Its capacity factor of 12% reflects intermittent or peaking operation.
| Plant Name | Mormon Flat |
|---|---|
| Operator | Salt River Project |
| City | Apache Junction |
| County | Maricopa County |
| State | Arizona |
| ZIP | 85119 |
| Coordinates | 33.55360, -111.44310 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| MF2 | Hydroelectric Pumped Storage | Water | 54.3 MW | Operating | 1971 |
| MF1 | Conventional Hydroelectric | Water | 9.2 MW | Operating | 1926 |
| 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.