United States › Power plants › Hydroelectric plants › Arizona
HYDROELECTRIC PLANTSHorse Mesa
Horse Mesa is a 131 MW operating hydroelectric plant in Maricopa County, Arizona, operated by Salt River Project.
Generators
Each generating unit EIA lists at this plant.
| Unit | Technology | Capacity | Status |
|---|---|---|---|
| HM4 | Hydroelectric Pumped Storage | 100 MW | |
| HM3 | Conventional Hydroelectric | 12 MW | |
| HM1 | Conventional Hydroelectric | 9.9 MW | |
| HM2 | Conventional Hydroelectric | 9.9 MW |
Plant details
- Operator
- Salt River Project
- Location
- Maricopa County, Arizona
- Balancing authority
- SRP
- Sector
- Electric Utility
- Capacity
- Operating: 131 MW
- First unit online
- Apr 1927
- EIA plant ID
- 145
Location
33.5907, -111.3440
Nearby power plants
- Mormon FlatHydroelectric plants · 63.5 MW · 6.3 mi
- Stewart MountainHydroelectric plants · 13.0 MW · 11.2 mi
- RooseveltHydroelectric plants · 36.0 MW · 11.9 mi
- Pediment BESS IBattery storage · 250 MW · 22.0 mi
- Mesa Carport PVSolar farms · 4.6 MW · 22.5 mi
- Queen Creek Solar FarmSolar farms · 19.0 MW · 27.2 mi
- Banner Solar IronwoodSolar farms · 1.4 MW · 29.1 mi
- SantanGas power plants · 1,326 MW · 29.4 mi
- Box Canyon (AZ)Solar farms · 300 MW · 29.8 mi
- Poseidon Solar, LLCSolar farms · 20.0 MW · 30.8 mi
Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem