Coolidge Generation Station — Plant Summary
- EIA Plant ID
- 56948
- Capacity
- 726 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Operating
- Location
- Pinal, AZ
- Operating Since
- 2011
- Generators
- 12
- Operator
- Salt River Project
- Parent Company
- Salt River Project
- Annual Generation
- 58,818 MWh
- Capacity Factor
- 0.9%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Coolidge Generation Station
OperatingNatural Gas
Ranked #9 of 33 Natural Gas plants in AZ#286 of 2009 nationally
726 MW Natural Gas operating in Pinal, AZ — Salt River Project
EIAWD
726 MW
Nameplate Capacity
12
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2011
Operating Since
Location
Coordinates
32.9174, -111.5033
County
Pinal, AZ
Nearby Plants
- Flatland StorageBESS200 MW · 0.5 km
- Brittlebush SolarSolar200 MW · 1.5 km
- Homer Solar Energy CenterSolar90 MW · 2.9 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Salt River Project | Salt River Project | — |
| Owner(s) | Salt River Project | Salt River Project | — |
| Status | Operating | — | — |
Ownership Chain
About
Coolidge Generation Station is a 726 MW natural gas-fired power plant located in Pinal County, Arizona. The plant began operating in 2011 and is owned and operated by Salt River Project. It consists of 12 natural gas-fired combustion turbine generators. The plant is located within the Salt River Project balancing authority area and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of record, the Coolidge Generation Station produced 58,818 MWh of electricity, operating at a capacity factor of 0.9%. The plant is the 9th largest in Arizona out of 26 plants, and ranks 291st nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Political Subdivision
Sector
Electric Utility
Generation
1.5K MWh
Latest Month
58.8K MWh
Annual Generation
0.9%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (5)Beta
Industry·other
SRP issues 500 MW all-source RFP as potential replacement for new gas resources
A 2021 request for proposals indicated gas resources were most cost-effective but Salt River Project said the “market is changing and...
Salt River Project (operator)
Utility Dive·3 years ago
Industry·other
SRP doesn't need a bigger natural gas power plant to meet demand
There's a less costly and risky way for SRP to secure its energy supply than expanding a natural gas plant. It's not too late to pursue it.
SRP (operator)
The Arizona Republic·3 years ago
Regulatory·state puc
Arizona regulators again reject SRP’s proposed 820-MW gas plant expansion
The Arizona Corporation Commission voted 3-2 on Monday to deny rehearing and reconsideration of Salt River Project's proposed 820-MW expansion of the gas-fired...
Salt River Project (operator)Arizona Corporation Commission (regulator)
Utility Dive·3 years ago
Regulatory·state puc
Arizona regulators deny SRP gas plant expansion, citing community impacts and insufficient supporting evidence
The Arizona Corporation Commission on Tuesday voted 4-1 to deny an 820-MW expansion at a gas plant proposed by Salt River Project.
Arizona Corporation Commission (regulator)Salt River Project (operator)
Utility Dive·3 years ago
Last updated 2026-03-14
View all 5 articles