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63.5 MW Conventional Hydroelectric (9 MW) + Hydroelectric Pumped Storage (54 MW) operating in Maricopa, AZ — Salt River Project
63.5 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Conventional Hydroelectric + Hydroelectric Pumped Storage
1926
Operating Since
Coordinates
33.5536, -111.4431
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Salt River Project | Salt River Project | — |
| Owner(s) | Salt River Project | Salt River Project | — |
| Status | Operating | operating | — |
The Mormon Flat Dam is a dam on the Salt River located Northeast of Phoenix, Arizona.
Read more on WikipediaMormon Flat is a 63.5 MW hybrid hydroelectric power plant located in Maricopa County, Arizona. The plant, which began operating in 1926, is owned and operated by Salt River Project. It utilizes conventional hydroelectric and pumped storage technologies, with water (WAT) as its primary fuel source. The facility consists of two generators.
Mormon Flat ranks as the 5th largest hydroelectric plant in Arizona (out of 11) and 266th nationally (out of 1464). In the most recent year of reported data, the plant generated 45,690 MWh of electricity, achieving a capacity factor of 8.2%. The plant operates within the Salt River Project balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−443 MWh
Net Charging
45.7K MWh
Annual Net Energy
8.2%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $145.7M
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Mormon FlatSalt River Project (SRP)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility