Stewart Mountain — Maricopa, AZ — Operational Power Plant
EIA 860M DataOperational
Total Capacity
13 MW
Technology
Hydro
1 generator
First Unit Online
March 1, 1930
Stewart Mountain is a hydro power plant in Maricopa County, AZ with a single generating unit rated at 13 MW of nameplate capacity. It is operated by Salt River Project. Its unit came online in 1930.
About this plant
The Stewart Mountain Dam is a concrete thin arch dam located 41 miles northeast of Phoenix, Arizona. The dam is 1,260 feet (380 m) long, 207 feet (63 m) high, and was built between 1928 and 1930. The dam includes a 13,000 kilowatt (kW) hydroelectric generating unit that is operated by SRP, an Arizona public utility. It is primarily operated during the summer months. The dam forms Saguaro Lake as it slows the passage of the Salt River in Maricopa County, Arizona. It was named after a ranch that used to be located nearby known as the Old Stewart Ranch.
Source: Wikipedia
Capacity rank
- #575 in the U.S. by capacity
- #9 in AZ by capacity
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Monthly generation history
Source: EIA Form 923
Generators (1)
Operational
1 generator
| Generator ID | Technology | Prime Mover | Nameplate (MW) | Summer (MW) | Winter (MW) | Status | Completion |
|---|---|---|---|---|---|---|---|
| SM | Conventional Hydroelectric | HY | 13 | 13 | 13 | Operational | March 1, 1930 |
Plant Information
| Plant ID | 150 |
| Plant Name | Stewart Mountain |
| Operator | Salt River Project |
| Sector | Electric Utility |
| Balancing Authority | SRP |
| Power Market | |
| County | Maricopa |
| State | Arizona (all interconnection requests in Arizona) |
| Status | Operational |
| Generation Type(s) | Hydro |
| Total Nameplate Capacity (MW) | 13 |
| Total Summer Capacity (MW) | 13 |
| Total Winter Capacity (MW) | 13 |
| Generating Units | 1 |
| Operational Units | 1 |
| Planned Units | 0 |
U.S. county map showing Maricopa, AZ
Data source: U.S. Energy Information Administration EIA Form 860M
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