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619 MW Natural Gas operating in Maricopa, AZ — Salt River Project
619 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2003
Operating Since
Coordinates
32.9750, -112.6944
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Salt River Project | Tucson Electric Power | — |
| Owner(s) | Tucson Electric Power Co | Fortis | — |
| Status | Operating | — | — |
Gila River Power Block 2 is a 619 MW natural gas-fired combined cycle power plant located in Maricopa County, Arizona. The plant began operating in 2003 and consists of 3 generators. It is owned by Fortis, a Canadian company, and operated by Salt River Project (SRP). Gila River Power Block 2 operates within the Salt River Project balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, the plant generated 2,890,336 MWh of electricity, achieving a capacity factor of 53.3%. Gila River Power Block 2 ranks as the 18th largest power plant in Arizona out of 26, and 383rd nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
173.3K MWh
Latest Month
2.9M MWh
Annual Generation
53.3%
Capacity Factor
CO₂ Intensity
856 lb/MWh
NOx
2 lb/MWh
SO₂
2013
$965/kW
Est. Construction Cost
Total estimated cost: $597.4M
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 Gila River Power Block 2Salt River Project (SRP)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility
0.004 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
51.9%
Annual Net Gen
2814 GWh
CO₂eq
857 lb/MWh
Subregion
WECC Southwest