Power plants operated by Salt River Project
Salt River Project operates 19 power plants in the 2025 EIA-860 data, with 8,518 MW of nameplate capacity, the 29th-largest fleet among the 5,826 operators on file. All of them are in Arizona. Natural gas is 87% of the capacity; the largest site is Santan. Its oldest working unit dates from 1926, at Mormon Flat. Units added from 2020 to 2025 total 322 MW.
- Natural gas7,372 MW87%
- Coal822 MW9.6%
- Pumped-storage hydro154 MW1.8%
- Hydroelectric94.1 MW1.1%
- Solar50.2 MW0.6%
- Battery storage25 MW0.3%
Capacity by decade it came online
CoalNatural gasHydroelectricPumped-storage hydroSolarBattery storage
Above the line: capacity operating in 2025. Below: capacity retired at these plants.
Plants
| Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|
| Santan | Arizona | Natural gas | 1,326 MW | 1974 |
| Coronado | Arizona | Coal | 822 MW | 1979 |
| Desert Basin | Arizona | Natural gas | 745 MW | 2001 |
| Agua Fria | Arizona | Natural gas | 738 MW | 1957 |
| Coolidge Generation Station | Arizona | Natural gas | 726 MW | 2011 |
| Mesquite Generating Station Block 1 | Arizona | Natural gas | 692 MW | 2003 |
| Gila River Power Block 1 | Arizona | Natural gas | 619 MW | 2003 |
| Gila River Power Block 2 | Arizona | Natural gas | 619 MW | 2003 |
| Gila River Power Block 3 | Arizona | Natural gas | 619 MW | 2003 |
| Gila River Power Block 4 | Arizona | Natural gas | 619 MW | 2003 |
| Kyrene | Arizona | Natural gas | 596 MW | 1952 |
| Horse Mesa | Arizona | Pumped-storage hydro | 131 MW | 1927 |
| Copper Crossing Energy and Research Cent | Arizona | Natural gas | 99 MW | 2024 |
| Mormon Flat | Arizona | Pumped-storage hydro | 63.5 MW | 1926 |
| Bonnybrooke PV | Arizona | Solar | 50 MW | 2016 |
| Roosevelt | Arizona | Hydroelectric | 36 MW | 1973 |
| Stewart Mountain | Arizona | Hydroelectric | 13 MW | 1930 |
| Crosscut | Arizona | Hydroelectric | 3 MW | 1939 |
| South Consolidated | Arizona | Hydroelectric | 1.4 MW | 1981 |