Coal power plant in Illinois, United States of America. Approximate location 38.9155, -90.2902.
CoalIllinoisUnited States of AmericaCO₂ reported
Sioux is a 1,099 MW coal power station in Illinois, United States of America. It is operated by Union Electric Co - (MO). Based on reported annual generation of 3,886 GWh, it can supply roughly 1,110,171 homes. It ranks #277 of 9,833 United States of America power plants by installed capacity. Commissioned in 1967, it is around 59 years old — an older, legacy facility. Its measured emissions of 3,233,285 t CO₂/yr (US EPA GHGRP) are equivalent to about 753,679 cars driven for a year. In context, coal supplies about 16.3% 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 USA0002107.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions reported to US EPA GHGRP.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by Union Electric Co - (MO). All plants by this company →
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 38.9°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 3% above 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: 51/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.
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.
The #99 largest coal power plant of 286 in United States of America by capacity.
United States of America has 286 coal power plants in this dataset, together about 249,149 MW of capacity.
Coordinates 38.9155, -90.2902 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
