Power plants in the Imperial Irrigation District balancing area
The Imperial Irrigation District balancing area takes in 58 power plants with 2,324 MW of nameplate capacity, the 37th-largest of the 40 areas covered here. All of its plants are in California. Geothermal makes up 34% of the mix, and the largest plant is El Centro Hybrid (388 MW). Since 2020, 524 MW has come online here, 39% of it solar.
- Geothermal788 MW34%
- Natural gas606 MW26%
- Solar585 MW25%
- Battery storage215 MW9.3%
- Hydroelectric83.9 MW3.6%
- Oil and petroleum24.9 MW1.1%
- Biomass and waste21 MW0.9%
Capacity by decade it came online
Natural gasOil and petroleumHydroelectricSolarBattery storageGeothermalBiomass and waste
Above the line: capacity operating in 2025. Below: capacity retired at plants that still run.
The 25 largest plants in the area
| Rank | Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|---|
| 1 | El Centro Hybrid | California | Natural gas | 388 MW | 1952 |
| 2 | Vikings Energy Farm | California | Battery storage | 287 MW | 2024 |
| 3 | Niland Gas Turbine Plant | California | Natural gas | 121 MW | 2008 |
| 4 | Coachella | California | Natural gas | 92.4 MW | 1973 |
| 5 | Heber Geothermal | California | Geothermal | 91.5 MW | 2006 |
| 6 | North Brawley Geothermal Plant | California | Geothermal | 80 MW | 2009 |
| 7 | Arrowleaf Solar and Storage | California | Solar | 77 MW | 2025 |
| 8 | Colgreen North Shore Solar Farm | California | Solar | 74.8 MW | 2018 |
| 9 | Second Imperial Geothermal | California | Geothermal | 74.5 MW | 2006 |
| 10 | Salton Sea Power LLC - Unit 5 | California | Geothermal | 58.3 MW | 2000 |
| 11 | John L. Featherstone Plant | California | Geothermal | 55 MW | 2012 |
| 12 | Salton Sea Power Gen Co - Unit 3 | California | Geothermal | 53.9 MW | 1989 |
| 13 | Midway Solar Farm 1 | California | Solar | 50 MW | 2018 |
| 14 | Rockwood | California | Natural gas | 49.8 MW | 1979 |
| 15 | Salton Sea Power Gen Co - Unit 4 | California | Geothermal | 47.5 MW | 1996 |
| 16 | Ormesa III | California | Geothermal | 45.6 MW | 1989 |
| 17 | CE Leathers | California | Geothermal | 45.5 MW | 1989 |
| 18 | Del Ranch Company | California | Geothermal | 45.5 MW | 1988 |
| 19 | Elmore Company | California | Geothermal | 45.5 MW | 1988 |
| 20 | Vulcan-BN Geothermal Power Company | California | Geothermal | 39.6 MW | 1985 |
| 21 | Pilot Knob | California | Hydroelectric | 33 MW | 1957 |
| 22 | Citizens Imperial Solar | California | Solar | 30 MW | 2019 |
| 23 | Midway Solar Farm II | California | Solar | 30 MW | 2017 |
| 24 | Seville 2 | California | Solar | 30 MW | 2015 |
| 25 | Ormesa II | California | Geothermal | 24 MW | 1989 |
States
| State | Plants | Capacity |
|---|---|---|
| California | 58 | 2,324 MW |
Operators with the most capacity
| Operator | Plants | Capacity |
|---|---|---|
| Imperial Irrigation District | 13 | 761 MW |
| CalEnergy Operating Corporation | 10 | 377 MW |
| Vikings Energy Farm, LLC | 1 | 287 MW |
| Ormat Nevada Inc | 5 | 190 MW |
| ORCAL Geothermal, Inc | 2 | 166 MW |
| ORNI 30 LLC | 1 | 77 MW |
| Sunpin Holdings, LLC | 1 | 74.8 MW |
| Hudson Ranch Power I LLC | 1 | 55 MW |
| 83WI 8ME, LLC | 1 | 50 MW |
| Deriva Energy | 2 | 50 MW |