Nameplate capacity
422 MW
Rank in Arizona
#35
of 200 plants
In service since
1959
April 1959
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- Arizona Public Service Co
- County
- Yuma County
- Generating units
- 8
- Share of state capacity
- 0.99%
- Rank among natural gas plants in Arizona
- #22 of 33
- EIA plant code
- 120
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ST1 | Natural Gas Steam Turbine | 87 MW | 75 MW | 1959 | Operating |
| GT3 | Natural Gas Fired Combustion Turbine | 72 MW | 51 MW | 1973 | Operating |
| GT4 | Petroleum Liquids | 72 MW | 50 MW | 1974 | Operating |
| GT5 | Natural Gas Fired Combustion Turbine | 61 MW | 44 MW | 2008 | Operating |
| GT6 | Natural Gas Fired Combustion Turbine | 61 MW | 44 MW | 2008 | Operating |
| GT21 | Petroleum Liquids | 25 MW | 20 MW | 1978 | Operating |
| GT1 | Natural Gas Fired Combustion Turbine | 22 MW | 17 MW | 1971 | Operating |
| GT2 | Natural Gas Fired Combustion Turbine | 22 MW | 17 MW | 1971 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Arizona
| McFarland B Solar and Storage | Solar | 450 MW |
| Sun Streams 3 | Solar | 430 MW |
| Serrano | Battery storage | 384 MW |
| Mohave County Wind Farm | Wind | 350 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 422 MW solar plant and a 422 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Arizona power plants · What Arizona actually generates