Valencia
Natural gas power plant · Santa Cruz County, Arizona
Nameplate capacity
108 MW
Rank in Arizona
#81
of 200 plants
In service since
1989
August 1989
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combustion Turbine
- Operator
- UNS Electric, Inc
- County
- Santa Cruz County
- Generating units
- 4
- Share of state capacity
- 0.25%
- Rank among natural gas plants in Arizona
- #26 of 33
- EIA plant code
- 6515
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GT4 | Natural Gas Fired Combustion Turbine | 54 MW | 20 MW | 2006 | Operating |
| GT1 | Natural Gas Fired Combustion Turbine | 18 MW | 12 MW | 1989 | Standby/Backup: available for service but not normally used |
| GT2 | Natural Gas Fired Combustion Turbine | 18 MW | 12 MW | 1989 | Standby/Backup: available for service but not normally used |
| GT3 | Natural Gas Fired Combustion Turbine | 18 MW | 12 MW | 1989 | Standby/Backup: available for service but not normally used |
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
| Mesquite Solar 5, LLC | Solar | 120 MW |
| Sierra Pinta BESS | Battery storage | 113 MW |
| North Loop | Natural gas | 108 MW |
| Central Line Solar, LLC | Solar | 100 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 108 MW solar plant and a 108 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