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745.1 MW Natural Gas Fired Combined Cycle (646 MW) + Natural Gas Fired Combustion Turbine (99 MW) operating in Pinal, AZ
745.1 MW
Nameplate Capacity
5
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combined Cycle + Natural Gas Fired Combustion Turbine
2001
Operating Since
Coordinates
32.9042, -111.7889
County
Pinal, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Salt River Project | Salt River Project | — |
| Owner(s) | Salt River Project | Salt River Project | — |
| Status | Operating | — | — |
Desert Basin is a 745.1 MW hybrid natural gas power plant located in Pinal County, Arizona. The plant began operating in 2001 and is owned and operated by Salt River Project. It consists of five generators utilizing both natural gas-fired combined cycle and natural gas-fired combustion turbine technologies. Desert Basin ranks as the 7th largest power plant in Arizona out of 26, and 278th nationally out of 945 plants.
The plant operates within the Salt River Project balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the latest year of available data, Desert Basin generated 2,084,973 MWh of electricity, achieving a capacity factor of 31.8%.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Salt River Project (SRP)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
81.6K MWh
Latest Month
2.1M MWh
Annual Generation
31.8%
Capacity Factor
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CO₂ Intensity
912 lb/MWh
NOx
0.082 lb/MWh
SO₂
0.005 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
45.9%
Annual Net Gen
2995 GWh
CO₂eq
913 lb/MWh
Subregion
WECC Southwest
2013
$965/kW
Est. Construction Cost
Total estimated cost: $719.1M
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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