Owner profile

Interstate Power and Light Co

Part of Alliant Energy →

Interstate Power and Light Co owns or operates 42 generating facilities commissioned between 1921 and 2024, with a combined nameplate capacity of 5.83 GW. The largest share of capacity is natural gas (47%), spread across 2 states.

Ownership reflects the utility or operator reported to EIA (Form EIA-860); equity ownership of individual facilities may differ.

42
Plants
5.83 GW
Total capacity
2
States
725.9 MW
Largest: Ottumwa

Capacity mix

Natural Gas 47.4%Wind 22.3%Coal 19.7%Solar 7.2%Oil 3.2%Storage 0.1%

By state

Iowa39 · 5.67 GWMinnesota3 · 166.2 MW

Operating plants

PlantFuelStateOwnerCapacity
OttumwaCoalIowaInterstate Power and Light Co725.9 MW
Marshalltown Generating StationNatural GasIowaInterstate Power and Light Co708.8 MW
Emery StationNatural GasIowaInterstate Power and Light Co602.8 MW
Upland PrairieWindIowaInterstate Power and Light Co299.3 MW
Burlington (IA)Natural GasIowaInterstate Power and Light Co290.8 MW
Prairie CreekNatural GasIowaInterstate Power and Light Co213.4 MW
Whispering Willow NorthWindIowaInterstate Power and Light Co201.3 MW
Golden PlainsWindIowaInterstate Power and Light Co199.8 MW
Whispering Willow Wind Farm - EastWindIowaInterstate Power and Light Co199.7 MW
MarshalltownNatural GasIowaInterstate Power and Light Co189 MW
English FarmsWindIowaInterstate Power and Light Co171.5 MW
Pleasant Creek Unit 2SolarIowaInterstate Power and Light Co150 MW
Wever Solar (150MW)SolarIowaInterstate Power and Light Co150 MW
Richland (IA)WindIowaInterstate Power and Light Co130.9 MW
Franklin County Wind FarmWindIowaInterstate Power and Light Co99 MW
Lime CreekOilIowaInterstate Power and Light Co90.2 MW
Creston Solar (50 MW)SolarIowaInterstate Power and Light Co50 MW
Pleasant Creek Unit 1SolarIowaInterstate Power and Light Co50 MW
Deer Run BatteryStorageIowaInterstate Power and Light Co5 MW
Cedar Rapids Community SolarSolarIowaInterstate Power and Light Co4.5 MW
West Dubuque SolarSolarIowaInterstate Power and Light Co3.8 MW
Decorah BatteryStorageIowaInterstate Power and Light Co2.5 MW
Hy-Vee Customer Hosted 2.25MW SolarSolarIowaInterstate Power and Light Co2.3 MW
ISU Customer Hosted 1MW Solar ProjectSolarIowaInterstate Power and Light Co1.4 MW
Fareway Customer Hosted 1 MW SolarSolarIowaInterstate Power and Light Co1 MW
Perry Customer Hosted 1MW Solar ProjectSolarIowaInterstate Power and Light Co1 MW
Retired plants (13)
PlantFuelStateOwnerCapacity
Lansingretired 2023CoalIowaInterstate Power and Light Co340.5 MW
Milton L Kappretired 2018Natural GasIowaInterstate Power and Light Co237.3 MW
Sutherlandretired 2017Natural GasIowaInterstate Power and Light Co156.6 MW
Fox Lakeretired 2017Natural GasMinnesotaInterstate Power and Light Co133.4 MW
Dubuqueretired 2017Natural GasIowaInterstate Power and Light Co85.2 MW
Sixth Streetretired 2010CoalIowaInterstate Power and Light Co84.7 MW
Agency GTretired 2010Natural GasIowaInterstate Power and Light Co78.8 MW
Centervilleretired 2017OilIowaInterstate Power and Light Co60 MW
Grinnellretired 2017Natural GasIowaInterstate Power and Light Co47.6 MW
Montgomeryretired 2012OilMinnesotaInterstate Power and Light Co28.8 MW
Red Cedarretired 2018Natural GasIowaInterstate Power and Light Co22.5 MW
Hillsretired 2015OilMinnesotaInterstate Power and Light Co4 MW
Ames Diesel Generating Stationretired 2008OilIowaInterstate Power and Light Co2 MW
Under construction (3)
PlantFuelStateOwnerCapacity
Grinnell Customer Hosted Solarconstr.SolarIowaInterstate Power and Light Co5 MW
Creston School Customer Hosted Solarconstr.SolarIowaInterstate Power and Light Co1.4 MW
Clinton Schoolsconstr.SolarIowaInterstate Power and Light Co1.3 MW