Hoover Dam (AZ)
Hoover Dam (AZ) is a hydroelectric plant in Mohave County, Arizona, operated by U S Bureau of Reclamation. Within the WAPA Desert Southwest balancing area it is the second-largest of 24 plants. Its oldest working unit dates from 1936, the second-earliest start among Arizona’s 8 hydroelectric plants.
Nameplate capacity, 2025
1,039 MW
1,040 MW net summer capacity
10 operable units
- Hydro1,039 MW100%
Unit by unit, 1936 to 2025
operating in 2025bar height follows unit size
Unit A0 Hydro, 2.4 MW, 1936
Unit A8 Hydro, 61.5 MW, 1937
Unit A6 Hydro, 130 MW, 1939
Unit A7 Hydro, 130 MW, 1939
Unit A1 Hydro, 130 MW, 1941
Unit A2 Hydro, 130 MW, 1942
Unit A5 Hydro, 127 MW, 1943
Unit A3 Hydro, 130 MW, 1952
Unit A4 Hydro, 130 MW, 1952
Unit A9 Hydro, 68.5 MW, 1952
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
- 3Santan1,326 MW
- 6West Phoenix1,207 MW
- 7Red Hawk1,127 MW
- 8Hoover Dam (AZ)this plant
- 9Coronado822 MW
- 10Ocotillo806 MW
Other rankings
- All US power plants
- 290th of 14,286
- Power plants in Arizona
- 8th of 191
- US hydroelectric plants
- 11th of 1,390
- Hydroelectric plants in Arizona
- 2nd of 8
- Plants run by U S Bureau of Reclamation
- 3rd of 57
- Biggest single unit, among Arizona’s plants
- 55th of 191
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| A0 | Hydro | 2.4 MW | 2.7 MW | 1936 | Operating |
| A8 | Hydro | 61.5 MW | 61.5 MW | 1937 | Operating |
| A7 | Hydro | 130 MW | 130 MW | 1939 | Operating |
| A6 | Hydro | 130 MW | 130 MW | 1939 | Operating |
| A1 | Hydro | 130 MW | 130 MW | 1941 | Operating |
| A2 | Hydro | 130 MW | 130 MW | 1942 | Operating |
| A5 | Hydro | 127 MW | 127 MW | 1943 | Operating |
| A9 | Hydro | 68.5 MW | 68.5 MW | 1952 | Operating |
| A4 | Hydro | 130 MW | 130 MW | 1952 | Operating |
| A3 | Hydro | 130 MW | 130 MW | 1952 | Operating |
Grid and site
- Balancing area
- WAPA Desert Southwest
- Reliability region
- Western Electricity Coordinating Council
- Highest grid connection voltage
- 230 kV
- Water source
- Lake Mead Colorado River
- Nearest town on record
- Boulder City
- Operator type
- Utility
- Coordinates
- 36.016°N, 114.738°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Hoover Dam (NV) | Hydroelectric | 1,039 MW | 0.0 mi north |
| Townsite Solar Project Hybrid | Solar | 270 MW | 9.8 mi southwest |
| River Mountains Solar | Solar | 14.4 MW | 10.8 mi west |
| Techren Solar V | Solar | 50 MW | 13.2 mi southwest |
| Techren Solar IV LLC | Solar | 25 MW | 14.0 mi southwest |
| Copper Mountain Solar 3 | Solar | 255 MW | 15.1 mi southwest |
| Saguaro Power | Natural gas | 127 MW | 15.4 mi west |
| Techren Solar II LLC | Solar | 200 MW | 15.9 mi southwest |