Santan
Santan is a natural gas plant in Maricopa County, Arizona, operated by Salt River Project. It ranks third by nameplate capacity among Arizona’s 191 power plants. It is the biggest of Arizona’s 33 natural gas plants. Within the Salt River Project balancing area it is the second-largest of 44 plants.
Nameplate capacity, 2025
1,326 MW
1,286 MW net summer capacity
9 operable units
- Gas combined cycle1,326 MW100%
Unit by unit, 1974 to 2025
operating in 2025bar height follows unit size
Unit ST1 Gas combined cycle, 104 MW, 1974
Unit ST2 Gas combined cycle, 104 MW, 1974
Unit ST3 Gas combined cycle, 104 MW, 1974
Unit ST4 Gas combined cycle, 104 MW, 1975
Unit ST5A Gas combined cycle, 154 MW, 2005
Unit ST5B Gas combined cycle, 154 MW, 2005
Unit ST5S Gas combined cycle, 314 MW, 2005
Unit ST6A Gas combined cycle, 154 MW, 2006
Unit ST6S Gas combined cycle, 136 MW, 2006
Among Arizona’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Palo Verde4,210 MW
- 2Springerville1,779 MW
- 3Santanthis plant
- 4Glen Canyon Dam1,312 MW
- 5Harquahala Generating Project1,277 MW
Other rankings
- All US power plants
- 175th of 14,286
- US natural gas plants
- 69th of 1,961
- Plants run by Salt River Project
- 1st of 19
- Biggest single unit, among Arizona’s plants
- 9th of 191
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ST1 | Gas combined cycle | 104 MW | 92 MW | 1974 | Operating |
| ST3 | Gas combined cycle | 104 MW | 92 MW | 1974 | Operating |
| ST2 | Gas combined cycle | 104 MW | 92 MW | 1974 | Operating |
| ST4 | Gas combined cycle | 104 MW | 92 MW | 1975 | Operating |
| ST5A | Gas combined cycle | 154 MW | 163 MW | 2005 | Operating |
| ST5B | Gas combined cycle | 154 MW | 163 MW | 2005 | Operating |
| ST5S | Gas combined cycle | 314 MW | 290 MW | 2005 | Operating |
| ST6A | Gas combined cycle | 154 MW | 171 MW | 2006 | Operating |
| ST6S | Gas combined cycle | 136 MW | 131 MW | 2006 | Operating |
Grid and site
- Balancing area
- Salt River Project
- Reliability region
- Western Electricity Coordinating Council
- Highest grid connection voltage
- 230 kV
- Water source
- Eastern Canal (SRP)
- Nearest town on record
- Gilbert
- Operator type
- Utility
- Coordinates
- 33.333°N, 111.750°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Gilbert Solar Facility I, LLC | Solar | 2 MW | 3.4 mi northwest |
| Superstition Energy Storage | Battery storage | 90 MW | 5.0 mi west |
| Mesa Carport PV | Solar | 4.6 MW | 8.6 mi east |
| Queen Creek Solar Farm | Solar | 19 MW | 9.2 mi southeast |
| South Consolidated | Hydroelectric | 1.4 MW | 9.4 mi north |
| Intel - Ocotillo Campus Solar | Solar | 4.2 MW | 10.3 mi southwest |
| Kyrene | Natural gas | 596 MW | 10.8 mi west |
| Ocotillo | Natural gas | 806 MW | 11.2 mi northwest |