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Coolidge Generation Station

Pinal County, Arizona · EIA plant ID 56948 · Operator: Salt River Project
Natural gasNatural Gas Fired Combustion TurbineBA: SRP

297 MW under construction (Natural Gas Fired Combustion Turbine), first expected Jul 2027 · EIA-860M

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Nameplate1,023MWSummer 773 MW
Generators18in service · 297 MW building
Net generation115GWh12 mo to Aug 2026
Capacity factor2%gas/coal/oil units, summer MW
Heat rate11,182Btu/kWhfossil units, electric fuel, HHV
First online2011Runs as peaking

The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.

Monthly net generation

EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
0255075100GWh201220132014201520162017201820192020202120222023202420252026

Capacity factor by year

Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
0%5%10%201220142016201820202022202420262.2% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
9,00010,00011,00012,0002012201420162018202020222024202611,182 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
20111143.7%9,855
2012314.26.9%9,964
2013234.25.1%10,226
2014211.14.6%10,060
2015277.36.1%10,160
2016167.73.7%10,195
2017167.33.7%10,243
2018155.33.4%10,303
2019330.27.2%10,420
2020499.610.9%10,211
2021276.86.1%10,503
2022329.97.2%10,384
2023422.19.3%10,337
2024197.34.3%10,445
202558.81.3%11,820

Generators

EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
Gen IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
1Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
10Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
11Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
12Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
2Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
3Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
4Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
5Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
6Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
7Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
8Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
9Natural Gas Fired Combustion TurbineGT60.543.4May 2011Operating—coming soon
COE13Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE14Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE15Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE16Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE17Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE18Natural Gas Fired Combustion TurbineGT49.542Jun 2026Operating—coming soon
COE19Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon
COE20Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon
COE21Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon
COE22Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon
COE23Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon
COE24Natural Gas Fired Combustion TurbineGT49.542planned Jul 2027Under construction—coming soon

Owner / operator

Operator: Salt River Project. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Salt River Project100.0%1,023 MW

Nearby plants

Within 80 km.
Flatland Storage200 MW0.5 km
Brittlebush Solar200 MW1.5 km
Storey Solar and Storage210 MW3.3 km
Saint Energy Storage II LLC100 MW5.4 km
Valley Farms Energy Center—5.4 km
Saint Solar100 MW5.7 km