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Sundance

Pinal County, Arizona · EIA plant ID 55522 · Operator: Arizona Public Service Co
Natural gasNatural Gas Fired Combustion TurbineBA: WALC
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Nameplate695MWSummer 490 MW
Generators12in service
Net generation153GWh12 mo to Aug 2026
Capacity factor4%gas/coal/oil units, summer MW
Heat rate10,642Btu/kWhfossil units, electric fuel, HHV
First online2002Runs 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
020406080GWh200320052007200920112013201520172019202120232025

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%15%200520102015202020253.7% · 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.
9,50010,00010,50011,0002005201020152020202510,642 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
200258.22.7%11,255
2003177.75.3%10,326
2004138.94.1%10,419
2005641.8%9,831
20061032.9%9,961
2007137.73.8%10,027
2008188.25.2%10,338
20091674.7%10,426
2010107.83.0%10,382
2011117.83.3%10,389
2012134.73.7%10,386
2013131.63.7%10,293
201452.91.5%10,792
201556.51.6%10,928
2016234.46.5%10,996
2017381.310.6%11,003
2018364.110.1%10,830
2019303.28.4%10,567
2020421.611.7%10,405
2021366.110.2%10,531
2022390.310.9%10,391
2023522.714.5%10,294
202438410.9%10,150
2025313.18.6%10,488

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
CT1Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT10Natural Gas Fired Combustion TurbineGT60.540Jun 2002Operating—coming soon
CT11Natural Gas Fired Combustion TurbineGT4545Nov 2025Operating—coming soon
CT12Natural Gas Fired Combustion TurbineGT4545Nov 2025Operating—coming soon
CT2Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT3Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT4Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT5Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT6Natural Gas Fired Combustion TurbineGT60.540May 2002Operating—coming soon
CT7Natural Gas Fired Combustion TurbineGT60.540Jun 2002Operating—coming soon
CT8Natural Gas Fired Combustion TurbineGT60.540Jun 2002Operating—coming soon
CT9Natural Gas Fired Combustion TurbineGT60.540Jun 2002Operating—coming soon

Owner / operator

Operator: Arizona Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Arizona Public Service Co100.0%695 MW

Nearby plants

Within 80 km.
Pinal Central Energy Center Hybrid30 MW6.9 km
Eleven Mile Solar Center600 MW7.5 km
Coolidge Generation Station1,023 MW8.2 km
Flatland Storage200 MW8.6 km
Brittlebush Solar200 MW9.3 km
East Line Solar100 MW9.4 km