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Prices here are state averages across all utilities and rate plans, from the U.S. Energy Information Administration — not the rate on any one bill. Generation-mix figures are reported annually, not real time.

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Interstate Power and Light Co

Electric power plant operator — U.S. Energy Information Administration (Forms EIA-860/860M).

Power plants
29
Total nameplate capacity
4,636 MW
States
1
Generators
44

Capacity by technology

Natural Gas Fired Combined Cycle · 2 plants1,311.6 MW
Onshore Wind Turbine · 7 plants1,301.5 MW
Conventional Steam Coal · 1 plant725.9 MW
Solar Photovoltaic · 13 plants520.7 MW
Natural Gas Steam Turbine · 2 plants489.6 MW
Natural Gas Fired Combustion Turbine · 1 plant189 MW
Petroleum Liquids · 1 plant90.2 MW
Batteries · 2 plants7.5 MW
PlantStateTechnologyCapacity
OttumwaIAConventional Steam Coal725.9 MW
Marshalltown Generating StationIANatural Gas Fired Combined Cycle708.8 MW
Emery StationIANatural Gas Fired Combined Cycle602.8 MW
Upland PrairieIAOnshore Wind Turbine299.3 MW
Burlington (IA)IANatural Gas Steam Turbine290.8 MW
Wever Solar (150MW)IASolar Photovoltaic249 MW
Whispering Willow NorthIAOnshore Wind Turbine201.3 MW
Golden PlainsIAOnshore Wind Turbine199.8 MW
Whispering Willow Wind Farm - EastIAOnshore Wind Turbine199.7 MW
Prairie CreekIANatural Gas Steam Turbine198.8 MW
MarshalltownIANatural Gas Fired Combustion Turbine189 MW
English FarmsIAOnshore Wind Turbine171.5 MW
Pleasant Creek Unit 2IASolar Photovoltaic150 MW
Richland (IA)IAOnshore Wind Turbine130.9 MW
Franklin County Wind FarmIAOnshore Wind Turbine99 MW
Lime CreekIAPetroleum Liquids90.2 MW
Creston Solar (50 MW)IASolar Photovoltaic50 MW
Pleasant Creek Unit 1IASolar Photovoltaic50 MW
Grinnell Customer Hosted SolarIASolar Photovoltaic5 MW
Deer Run BatteryIABatteries5 MW
Cedar Rapids Community SolarIASolar Photovoltaic4.5 MW
West Dubuque SolarIASolar Photovoltaic3.8 MW
Decorah BatteryIABatteries2.5 MW
Hy-Vee Customer Hosted 2.25MW SolarIASolar Photovoltaic2.3 MW
ISU Customer Hosted 1MW Solar ProjectIASolar Photovoltaic1.4 MW
Creston School Customer Hosted SolarIASolar Photovoltaic1.4 MW
Clinton SchoolsIASolar Photovoltaic1.3 MW
Fareway Customer Hosted 1 MW SolarIASolar Photovoltaic1 MW
Perry Customer Hosted 1MW Solar ProjectIASolar Photovoltaic1 MW

Source: U.S. Energy Information Administration, Forms EIA-860/EIA-860M — currently operating generators, aggregated to plant then to operator.

Interstate Power and Light Co — Power Plants & Capacity | EnergyAtlasUSA