← Back to map

H Wilson Sundt Generating Station

Pima County, Arizona · EIA plant ID 126 · Operator: Tucson Electric Power Co
Natural gasNatural Gas Fired Combustion TurbineNatural Gas Internal Combustion EngineNatural Gas Steam Turbine⛽ Dual-fuelBA: TEPC
📍 Open in Google Maps
Nameplate529MWSummer 490 MW
Generators14in service
Net generation1,604GWh12 mo to Aug 2026
Capacity factor45%gas/coal/oil units, summer MW
Heat rate10,452Btu/kWhfossil units, electric fuel, HHV
First online1962Runs as intermediate

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
0100200GWh2001200320052007200920112013201520172019202120232025

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%20%40%2005201020152020202544.9% · 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.
9,00010,00011,00012,0002005201020152020202510,452 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
20011,645.7——
20021,404——
20031,046.924.7%10,702
20041,150.627.0%11,032
20051,152.827.2%10,985
2006942.822.5%11,474
20071,03924.8%11,028
20081,061.625.6%9,971
200968816.6%11,524
2010856.420.7%11,673
201190721.9%12,343
2012803.219.4%11,827
2013668.916.3%11,792
2014842.820.5%11,708
2015771.818.7%10,560
2016777.318.8%10,628
2017752.418.3%11,310
20181,412.434.3%11,429
20191,64841.7%11,861
20201,463.534.7%10,685
2021818.619.1%10,320
2022937.821.9%10,520
20231,390.932.4%10,540
20241,805.541.9%10,051
20251,637.538.1%10,224

Fuel capability

Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo870 MMBtu
Last month with liquid burnApr 2026
Switch while operatingYes
Net summer MW on gas48
Net summer MW on oil48
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)

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
4Natural Gas Steam TurbineST173.3156Jul 1967Operating—coming soon
GT1Natural Gas Fired Combustion TurbineGT2724Dec 1972Operating—coming soon
GT2Natural Gas Fired Combustion TurbineGT2724Dec 1972Operating—coming soon
RIC1Natural Gas Internal Combustion EngineIC18.818.2Mar 2020Operating—coming soon
RIC10Natural Gas Internal Combustion EngineIC18.818.2Dec 2019Operating—coming soon
RIC2Natural Gas Internal Combustion EngineIC18.818.2Mar 2020Operating—coming soon
RIC3Natural Gas Internal Combustion EngineIC18.818.2Mar 2020Operating—coming soon
RIC4Natural Gas Internal Combustion EngineIC18.818.2Mar 2020Operating—coming soon
RIC5Natural Gas Internal Combustion EngineIC18.818.2Mar 2020Operating—coming soon
RIC6Natural Gas Internal Combustion EngineIC18.818.2Dec 2019Operating—coming soon
RIC7Natural Gas Internal Combustion EngineIC18.818.2Dec 2019Operating—coming soon
RIC8Natural Gas Internal Combustion EngineIC18.818.2Dec 2019Operating—coming soon
RIC9Natural Gas Internal Combustion EngineIC18.818.2Dec 2019Operating—coming soon
ST3Natural Gas Steam TurbineST113.6104Jun 1962Operating—coming soon
ST1Natural Gas Steam TurbineST108.881Dec 1958Retired Nov 2019—coming soon
ST2Natural Gas Steam TurbineST108.881Oct 1960Retired Nov 2019—coming soon

Owner / operator

Operator: Tucson Electric Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Tucson Electric Power Co100.0%529 MW

Nearby plants

Within 80 km.
Davis Monthan AFB (AZ) West Airfield13 MW1.6 km
Raptor Ridge13 MW2.9 km
Valencia Solar10 MW3.9 km
TJX Tucson1 MW4 km
Actus Lend Lease DMAFB3 MW4.6 km
Amazon TUS23 MW7.1 km