Coolidge Generation Station
Natural gas power plant in Pinal County, Arizona. 1,023 MW of nameplate capacity across 18 generators, operated by Salt River Project.
Also known as EIA plant 56948
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,023 MWNameplate
- Generators
- 18 operatingEIA-860M, August 2026
- Operating since
- May 2011First generator online
- Operator
- Salt River ProjectEIA operator ID 16572
- Grid
- SRPBalancing authority SRP
- Price nodes
- None linkedNo verified ISO node
- Location
- Pinal County, AZ32.9174, −111.5033
- EIA plant ID
- 56948EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Coolidge Generation Station produces
Free · EIA-923Net generation, 2025
58.8 GWh
58,818 MWh, final
Capacity factor, 2025
0.9%
2024: 3.1%
January to July 2026
65.2 GWh
Provisional
Range, 2015 to 2025
58.8–499.6
GWh a year. Low 2025, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | 113,961 | Not reported | 8 of 12 |
| 2012 | 314,231 | 4.9% | 12 of 12 |
| 2013 | 234,212 | 3.7% | 12 of 12 |
| 2014 | 211,114 | 3.3% | 12 of 12 |
| 2015 | 277,290 | 4.4% | 12 of 12 |
| 2016 | 167,696 | 2.6% | 12 of 12 |
| 2017 | 167,265 | 2.6% | 12 of 12 |
| 2018 | 155,334 | 2.4% | 12 of 12 |
| 2019 | 330,192 | 5.2% | 12 of 12 |
| 2020 | 499,566 | 7.8% | 12 of 12 |
| 2021 | 276,761 | 4.4% | 12 of 12 |
| 2022 | 329,946 | 5.2% | 12 of 12 |
| 2023 | 422,113 | 6.6% | 12 of 12 |
| 2024 | 197,336 | 3.1% | 12 of 12 |
| 2025 | 58,818 | 0.9% | 12 of 12 |
| 2026 (provisional, partial year) | 65,152 | Not reported | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
40,668
US short tons. 2024: 123,377
SO₂, 2025
0
US short tons
NOx, 2025
7
US short tons
CO₂ per MWh, calculated
0.69 t
About 1,383 lb per MWh
12 of 12 EPA units reported CO₂ in 2025 (CT01, CT02, CT03, CT04, CT05, CT06, CT07, CT08, and others), matched to EIA plant 56948 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 2 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 3 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 4 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 5 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 6 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 7 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 8 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 9 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 10 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 11 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| 12 | Natural Gas Fired Combustion Turbine | 60.5 | May 2011 |
| COE13 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
| COE14 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
| COE15 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
| COE16 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
| COE17 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
| COE18 | Natural Gas Fired Combustion Turbine | 49.5 | June 2026 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Salt River Project as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Coolidge Generation Station
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Questions about Coolidge Generation Station
How much power does Coolidge Generation Station produce?
Coolidge Generation Station reported 58,818 MWh (58.8 GWh) of net generation in 2025, a 0.9% capacity factor on 1,023 MW of nameplate capacity. From January to July 2026 it reported 65.2 GWh, which is provisional.
Where is Coolidge Generation Station?
Coolidge Generation Station is in Pinal County, Arizona, at 32.9174, −111.5033. It is in the Salt River Project balancing area (SRP).
Who operates Coolidge Generation Station?
EIA-860M for August 2026 lists Salt River Project as the operator (EIA operator ID 16572). The operator is not always the owner.
When did Coolidge Generation Station start operating?
Its first generator began operating in May 2011, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page