Hydroelectric Power Plants in Arizona
Every operating hydroelectric power plant in Arizona on EIA-860M for 2026-07: 8 plants, 30 generating units and 3 GW of nameplate capacity across 4 counties.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 8
- 30 generating units
- Nameplate capacity
- 3 GW
- Counties
- 4
- Grid operator
- Mixed
- no single ISO covers a majority
Map of hydroelectric power plants in Arizona
Every one of the 8 plants is drawn at the coordinate EIA files for it.
Loading map…
- Hydro · 8
List of hydroelectric power plants in Arizona
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| Glen Canyon DamConventional Hydroelectric | U S Bureau of Reclamation | Coconino | 1,312 | 8 | 1964 | Operating |
| Hoover Dam (AZ)Conventional Hydroelectric | U S Bureau of Reclamation | Mohave | 1,039.4 | 10 | 1936 | Operating |
| Davis DamConventional Hydroelectric | U S Bureau of Reclamation | Mohave | 254.8 | 5 | 1951 | Operating |
| RooseveltConventional Hydroelectric | Salt River Project | Maricopa | 36 | 1 | 1973 | Operating |
| Headgate RockConventional Hydroelectric | Colorado River Indian Irr Proj | La Paz | 19.5 | 3 | 1993 | Out of service but expected to return to service in next calendar year |
| Stewart MountainConventional Hydroelectric | Salt River Project | Maricopa | 13 | 1 | 1930 | Operating |
| CrosscutConventional Hydroelectric | Salt River Project | Maricopa | 3 | 1 | 1939 | Out of service and NOT expected to return to service in next calendar year |
| South ConsolidatedConventional Hydroelectric | Salt River Project | Maricopa | 1.4 | 1 | 1981 | Out of service and NOT expected to return to service in next calendar year |
Largest hydroelectric power plants in Arizona
- 1Glen Canyon DamCoconino County, Arizona1,312 MW
- 2Hoover Dam (AZ)Mohave County, Arizona1,039.4 MW
- 3Davis DamMohave County, Arizona254.8 MW
- 4RooseveltMaricopa County, Arizona36 MW
- 5Headgate RockLa Paz County, Arizona19.5 MW
- 6Stewart MountainMaricopa County, Arizona13 MW
- 7CrosscutMaricopa County, Arizona3 MW
- 8South ConsolidatedMaricopa County, Arizona1.4 MW
Hydroelectric power plants by county in Arizona
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| Coconino | 1 | 1,312 |
| Mohave | 2 | 1,294.2 |
| Maricopa | 4 | 53.4 |
| La Paz | 1 | 19.5 |
Hydroelectric Power Plants in Arizona: FAQ
- How many hydroelectric power plants are in Arizona?
- 8, with 3 GW of nameplate capacity between them, spread over 4 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of Arizona hydroelectric power plants?
- Yes — the map above. Each dot is one hydroelectric power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest hydroelectric power plant in Arizona?
- Glen Canyon Dam, at 1 GW. The table is sorted largest first, so the rest follow it.
- Is there a hydroelectric power plant near me in Arizona?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs Arizona's hydroelectric power plants?
- No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Arizona is largely a vertically integrated utility rather than an organised market.
- How current is this, and what is left out?
- EIA-860M for 2026-07. Conventional hydroelectric. Pumped storage is counted separately. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.