Power plants operated by MidAmerican Energy Co
MidAmerican Energy Co operates 57 power plants in the 2025 EIA-860 data, with 13.2 GW of nameplate capacity, the 13th-largest fleet among the 5,826 operators on file. They are spread over two states: Iowa and Illinois. Wind is 59% of the capacity; the largest site is Walter Scott Jr Energy Center. Its oldest working unit dates from 1942, at Moline. Units added from 2020 to 2025 total 1,780 MW.
- Wind7,771 MW59%
- Coal3,740 MW28%
- Natural gas1,486 MW11%
- Solar142 MW1.1%
- Oil and petroleum54 MW0.4%
- Hydroelectric3.6 MW0.0%
- Battery storage1.1 MW0.0%
Capacity by decade it came online
CoalNatural gasOil and petroleumHydroelectricWindSolarBattery storage
Above the line: capacity operating in 2025. Below: capacity retired at these plants.
Plants
| Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|
| Walter Scott Jr Energy Center | Iowa | Coal | 1,648 MW | 1978 |
| Louisa | Iowa | Coal | 812 MW | 1983 |
| George Neal South | Iowa | Coal | 696 MW | 1979 |
| George Neal North | Iowa | Coal | 584 MW | 1975 |
| Greater Des Moines | Iowa | Natural gas | 576 MW | 2003 |
| Highland Wind Project (IA) | Iowa | Wind | 502 MW | 2015 |
| Orient Wind Farm | Iowa | Wind | 501 MW | 2018 |
| Rolling Hills Wind Farm | Iowa | Wind | 484 MW | 2011 |
| Beaver Creek Wind | Iowa | Wind | 340 MW | 2017 |
| North English | Iowa | Wind | 340 MW | 2018 |
| Palo Alto Wind Farm | Iowa | Wind | 340 MW | 2020 |
| Arbor Hill Wind Farm | Iowa | Wind | 310 MW | 2018 |
| Ida Grove Wind | Iowa | Wind | 301 MW | 2016 |
| Pomeroy Wind Farm | Iowa | Wind | 286 MW | 2007 |
| Lundgren Wind Project | Iowa | Wind | 271 MW | 2014 |
| Electrifarm | Iowa | Natural gas | 264 MW | 1975 |
| Southern Hills Wind Farm | Iowa | Wind | 254 MW | 2021 |
| Diamond Trail Wind Farm | Iowa | Wind | 252 MW | 2020 |
| O’Brien Wind | Iowa | Wind | 250 MW | 2016 |
| Shenandoah Hills Wind Farm | Iowa | Wind | 214 MW | 2025 |
| Eclipse Wind Farm | Iowa | Wind | 207 MW | 2012 |
| Plymouth Wind | Iowa | Wind | 203 MW | 2022 |
| Chickasaw Wind Farm | Iowa | Wind | 202 MW | 2023 |
| Century | Iowa | Wind | 201 MW | 2005 |
| Ida Grove II | Iowa | Wind | 201 MW | 2019 |
| Pleasant Hill | Iowa | Natural gas | 180 MW | 1990 |
| Intrepid | Iowa | Wind | 176 MW | 2004 |
| Adair Wind Farm | Iowa | Wind | 175 MW | 2008 |
| Prairie Wind Farm | Iowa | Wind | 168 MW | 2018 |
| Walnut Wind Farm | Iowa | Wind | 165 MW | 2008 |
| Carroll Wind Farm | Iowa | Wind | 159 MW | 2008 |
| Sycamore (IA) | Iowa | Natural gas | 158 MW | 1974 |
| Adams Wind | Iowa | Wind | 154 MW | 2015 |
| Vienna Wind Farm | Iowa | Wind | 150 MW | 2012 |
| Wellsburg Wind Project | Iowa | Wind | 141 MW | 2014 |
| River Hills | Iowa | Natural gas | 128 MW | 1966 |
| Laurel Wind Farm | Iowa | Wind | 123 MW | 2011 |
| Macksburg Wind Project | Iowa | Wind | 120 MW | 2014 |
| Contrail Wind Farm | Iowa | Wind | 112 MW | 2020 |
| Morning Light Wind Farm | Iowa | Wind | 111 MW | 2012 |
| Victory Wind Farm | Iowa | Wind | 105 MW | 2006 |
| Holliday Creek Solar | Iowa | Solar | 100 MW | 2022 |
| Ivester Wind Farm | Iowa | Wind | 90.8 MW | 2018 |
| Charles City Wind Farm | Iowa | Wind | 80 MW | 2008 |
| Pocahontas Prairie Wind Farm | Iowa | Wind | 80 MW | 2012 |
| Moline | Illinois | Natural gas | 75.6 MW | 1942 |
| Coralville GT | Iowa | Natural gas | 72 MW | 1970 |
| Merl Parr | Iowa | Natural gas | 36 MW | 1969 |
| Arbor Hill Solar | Iowa | Solar | 25 MW | 2022 |
| Shenandoah | Iowa | Oil and petroleum | 20 MW | 2000 |
| Waterloo Lundquist | Iowa | Oil and petroleum | 18 MW | 2000 |
| Knoxville Industrial | Iowa | Oil and petroleum | 16 MW | 2000 |
| Franklin County Solar | Iowa | Solar | 7 MW | 2022 |
| Neal Energy Center Solar | Iowa | Solar | 4 MW | 2022 |
| Johnson County Hills Solar | Iowa | Solar | 3 MW | 2022 |
| Waterloo Solar (IA) | Iowa | Solar | 3 MW | 2022 |
| Knoxville Battery Energy Storage | Iowa | Battery storage | 1.1 MW | 2018 |