H Wilson Sundt Generating Station — United States of America
Gas power plant in Arizona, United States of America. Approximate location 32.16, -110.9047.
GasArizonaUnited States of AmericaSteamCO₂ modelled
H Wilson Sundt Generating Station is a 434.9 MW gas power station in Arizona, United States of America. It is operated by Tucson Electric Power Co. Based on reported annual generation of 1,648 GWh, it can supply roughly 471k homes. It ranks #1320 of 10,884 United States of America power plants by installed capacity. Commissioned in 1977, it is around 49 years old — long-established. Its modelled annual emissions are 828,070 t CO₂/yr (Climate TRACE), equivalent to about 193k cars driven for a year. In context, gas supplies about 40.0% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0000126.
Data status
Known data
Modelled source data
Calculated from dataset
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 434.9 MW, H Wilson Sundt Generating Station is well above the median gas plant in United States of America (121.2 MW). Technically it is described as Steam. Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
~828,070 t CO₂/yr (modelled) — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Key facts
- Load factor
- 43%, from 1,648 GWh of reported generation; the median for 1622 gas plants in United States of America that report generation is 26%
- Share of United States of America gas capacity
- less than 0.1% of 789,950 MW across 2,165 plants in this dataset
- Age among peers
- 284 of 1,973 dated gas plants in United States of America are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Tucson Electric Power Co. All plants by this company →
Local climate & thermal context
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a hot semi-arid steppe climate (Köppen BSh) — Northern Hemisphere, latitude 32.2°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 64% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 25/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~3% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a benign, low-corrosion environment (estimated ISO 9223 class C1 — Very low), with dust abrasion the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #642 largest gas power plant of 2165 in United States of America by capacity.
United States of America has 2165 gas power plants in this dataset, together about 789,950 MW of capacity.
Nearby power plants
- H. Wilson Sundt Generating Station · Coal · 475.3 MW · Arizona
- Davis Monthan AFB (AZ) West Airfield · Solar · 12.6 MW · Arizona
- Valencia Solar · Solar · 10 MW · Arizona
- Actus Lend Lease DMAFB · Solar · 3 MW · Arizona
- Pima Community College - East Campus · Solar · 1.3 MW · Arizona
- Pima Community College · Solar · 1.1 MW · Arizona
Location
Coordinates 32.16, -110.9047 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is H Wilson Sundt Generating Station?
H Wilson Sundt Generating Station is a 434.9 MW gas power plant in Arizona, United States of America, commissioned in 1977.
How much electricity does H Wilson Sundt Generating Station generate?
H Wilson Sundt Generating Station generates about 1,648 GWh of electricity per year.
Who operates H Wilson Sundt Generating Station?
H Wilson Sundt Generating Station is operated by Tucson Electric Power Co.
How much CO₂ does H Wilson Sundt Generating Station emit?
H Wilson Sundt Generating Station has modelled emissions of about 828,070 tonnes of CO₂ per year (Climate TRACE).