Nameplate capacity
726 MW
Rank in Iowa
#3
of 305 plants
In service since
1981
May 1981
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Interstate Power and Light Co
- County
- Wapello County
- Generating units
- 1
- Share of state capacity
- 2.91%
- Rank among coal plants in Iowa
- #3 of 8
- EIA plant code
- 6254
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Steam Coal | 726 MW | 714 MW | 1981 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Iowa
| Walter Scott Jr Energy Center | Coal | 1,648 MW |
| Louisa | Coal | 812 MW |
| Marshalltown Generating Station | Natural gas | 709 MW |
| George Neal South | Coal | 696 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 726 MW solar plant and a 726 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Iowa power plants · What Iowa actually generates