Glen Canyon Dam
Hydro power plant · Coconino County, Arizona
Nameplate capacity
1,312 MW
Rank in Arizona
#4
of 200 plants
In service since
1964
September 1964
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- U S Bureau of Reclamation
- County
- Coconino County
- Generating units
- 8
- Share of state capacity
- 3.07%
- Rank among hydro plants in Arizona
- #1 of 11
- EIA plant code
- 153
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 165 MW | 165 MW | 1964 | Operating |
| 2 | Conventional Hydroelectric | 165 MW | 165 MW | 1964 | Operating |
| 3 | Conventional Hydroelectric | 165 MW | 165 MW | 1964 | Operating |
| 4 | Conventional Hydroelectric | 165 MW | 165 MW | 1965 | Operating |
| 5 | Conventional Hydroelectric | 165 MW | 165 MW | 1965 | Operating |
| 6 | Conventional Hydroelectric | 165 MW | 165 MW | 1965 | Operating |
| 8 | Conventional Hydroelectric | 165 MW | 165 MW | 1966 | Operating |
| 7 | Conventional Hydroelectric | 157 MW | 157 MW | 1966 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Arizona
| Springerville | Coal | 1,779 MW |
| Santan | Natural gas | 1,326 MW |
| Harquahala Generating Project | Natural gas | 1,277 MW |
| West Phoenix | Natural gas | 1,207 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 1,312 MW solar plant and a 1,312 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Arizona power plants · What Arizona actually generates