Parent company profile

Alliant Energy

Alliant Energy operates 78 U.S. generating facilities through 2 reported operators, with a combined nameplate capacity of 12.07 GW. The largest share of capacity is natural gas (47%), spread across 3 states.

Ownership reflects the utility or operator reported to EIA (Form EIA-860); equity ownership of individual facilities may differ. The grouping of operators into this parent company is curated by GridAlmanac from public corporate-ownership records.

78
Plants
12.07 GW
Total capacity
2
Subsidiaries
3
States

Capacity mix

Natural Gas 47.0%Coal 24.1%Wind 14.3%Solar 12.6%Oil 1.5%Hydroelectric 0.4%Storage 0.1%

Operating subsidiaries

Wisconsin Power & Light Co36 · 6.24 GWInterstate Power and Light Co42 · 5.83 GW

By state

Iowa40 · 5.82 GWMinnesota4 · 367.5 MWWisconsin34 · 5.88 GW

Operating plants

PlantFuelStateOwnerCapacity
Columbia (WI)CoalWisconsinWisconsin Power & Light Co1.11 GW
West Riverside Energy CenterNatural GasWisconsinWisconsin Power & Light Co727.6 MW
OttumwaCoalIowaInterstate Power and Light Co725.9 MW
Marshalltown Generating StationNatural GasIowaInterstate Power and Light Co708.8 MW
Riverside Energy CenterNatural GasWisconsinWisconsin Power & Light Co674.9 MW
Emery StationNatural GasIowaInterstate Power and Light Co602.8 MW
EdgewaterCoalWisconsinWisconsin Power & Light Co413.7 MW
South Fond Du LacNatural GasWisconsinWisconsin Power & Light Co381.6 MW
Alliant Energy NeenahNatural GasWisconsinWisconsin Power & Light Co371 MW
Sheboygan FallsNatural GasWisconsinWisconsin Power & Light Co346.8 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
Bent Tree Wind Farm Phase 1WindMinnesotaWisconsin Power & Light Co201.3 MW
Whispering Willow NorthWindIowaInterstate Power and Light Co201.3 MW
Grant CountySolarWisconsinWisconsin Power & Light Co200 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
KossuthWindIowaWisconsin Power & Light Co152.2 MW
Onion RiverSolarWisconsinWisconsin Power & Light Co150 MW
Wood CountySolarWisconsinWisconsin Power & Light Co150 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
Springfield Solar (WI)SolarWisconsinWisconsin Power & Light Co100 MW
Wautoma SolarSolarWisconsinWisconsin Power & Light Co99 MW
Franklin County Wind FarmWindIowaInterstate Power and Light Co99 MW
Lime CreekOilIowaInterstate Power and Light Co90.2 MW
Crawfish RiverSolarWisconsinWisconsin Power & Light Co75 MW
Cedar RidgeWindWisconsinWisconsin Power & Light Co67.7 MW
Paddock SolarSolarWisconsinWisconsin Power & Light Co65 MW
Albany Solar (WI)SolarWisconsinWisconsin Power & Light Co50 MW
Bear Creek (WI)SolarWisconsinWisconsin Power & Light Co50 MW
Beaver Dam SolarSolarWisconsinWisconsin Power & Light Co50 MW
Cassville SolarSolarWisconsinWisconsin Power & Light Co50 MW
North RockSolarWisconsinWisconsin Power & Light Co50 MW
Creston Solar (50 MW)SolarIowaInterstate Power and Light Co50 MW
Pleasant Creek Unit 1SolarIowaInterstate Power and Light Co50 MW
Prairie Du SacHydroelectricWisconsinWisconsin Power & Light Co33.4 MW
KilbournHydroelectricWisconsinWisconsin Power & Light Co9.7 MW
Portage Industrial BatteryStorageWisconsinWisconsin Power & Light Co5 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
Boaz Microgrid BatteryStorageWisconsinWisconsin Power & Light Co3.6 MW
Decorah BatteryStorageIowaInterstate Power and Light Co2.5 MW
Kohler SolarSolarWisconsinWisconsin Power & Light Co2.3 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
City of Sheboygan SolarSolarWisconsinWisconsin Power & Light Co0.9 MW
Retired plants (17)
PlantFuelStateOwnerCapacity
Lansingretired 2023CoalIowaInterstate Power and Light Co340.5 MW
Rock Riverretired 2020Natural GasWisconsinWisconsin Power & Light Co318.9 MW
Milton L Kappretired 2018Natural GasIowaInterstate Power and Light Co237.3 MW
Nelson Dewey Generating Stationretired 2015CoalWisconsinWisconsin Power & Light Co227.2 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
Blackhawkretired 2010Natural GasWisconsinWisconsin Power & Light Co50 MW
Grinnellretired 2017Natural GasIowaInterstate Power and Light Co47.6 MW
Sheepskinretired 2020Natural GasWisconsinWisconsin Power & Light Co41.7 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 (7)
PlantFuelStateOwnerCapacity
Grinnell Customer Hosted Solarconstr.SolarIowaInterstate Power and Light Co5 MW
Janesville Community Solarconstr.SolarWisconsinWisconsin Power & Light Co2.3 MW
UW Kegonsa Customer Hosted Solarconstr.SolarWisconsinWisconsin Power & Light Co2.3 MW
Nortera Customer Hosted Solarconstr.SolarWisconsinWisconsin Power & Light Co1.6 MW
Rock County Customer Hosted Solarconstr.SolarWisconsinWisconsin Power & Light Co1.4 MW
Creston School Customer Hosted Solarconstr.SolarIowaInterstate Power and Light Co1.4 MW
Clinton Schoolsconstr.SolarIowaInterstate Power and Light Co1.3 MW

See the full operator directory under owners & operators.