Power plants operated by Tucson Electric Power Co
Tucson Electric Power Co operates 10 power plants in the 2025 EIA-860 data, with 2,987 MW of nameplate capacity, the 78th-largest fleet among the 5,826 operators on file. They are spread over two states: Arizona and New Mexico. Coal is 59% of the capacity; the largest site is Springerville. Its oldest working unit dates from 1962, at H Wilson Sundt Generating Station. Units added from 2020 to 2025 total 556 MW.
- Coal1,766 MW59%
- Natural gas722 MW24%
- Wind250 MW8.4%
- Battery storage200 MW6.7%
- Solar49.3 MW1.7%
Capacity by decade it came online
CoalNatural gasWindSolarBattery storage
Above the line: capacity operating in 2025. Below: capacity retired at these plants.
Plants
| Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|
| Springerville | Arizona | Coal | 1,779 MW | 1985 |
| H Wilson Sundt Generating Station | Arizona | Natural gas | 529 MW | 1962 |
| Oso Grande Wind Farm | New Mexico | Wind | 250 MW | 2021 |
| Roadrunner Reserve Phase 1 | Arizona | Battery storage | 200 MW | 2025 |
| North Loop | Arizona | Natural gas | 108 MW | 1972 |
| Demoss Petrie | Arizona | Natural gas | 85 MW | 2001 |
| Fort Huachuca Solar PV Project | Arizona | Solar | 17.7 MW | 2014 |
| Raptor Ridge | Arizona | Solar | 12.5 MW | 2022 |
| Prairie Fire | Arizona | Solar | 4.5 MW | 2012 |
| UASTP I | Arizona | Solar | 1.2 MW | 2010 |