Ottumwa
Wapello County, Iowa · EIA plant ID 6254 · Operator: Interstate Power and Light Co
Nameplate726MWSummer 714 MW
Generators1in service
Net generation3,540GWh12 mo to Aug 2026
Capacity factor57%gas/coal/oil units, summer MW
Heat rate10,938Btu/kWhfossil units, electric fuel, HHV
First online1981Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 4,281.1 | 66.2% | 11,105 |
| 2002 | 4,480.9 | 71.0% | 11,174 |
| 2003 | 4,779.4 | 74.7% | 11,312 |
| 2004 | 4,179.4 | 66.4% | 11,678 |
| 2005 | 3,241 | 55.2% | 11,922 |
| 2006 | 3,952.1 | 67.1% | 12,128 |
| 2007 | 3,794.4 | 61.0% | 11,769 |
| 2008 | 4,206.6 | 67.4% | 11,193 |
| 2009 | 3,759.8 | 60.4% | 11,193 |
| 2010 | 3,727.9 | 61.2% | 10,947 |
| 2011 | 3,408.6 | 55.8% | 11,033 |
| 2012 | 2,914.6 | 46.9% | 10,895 |
| 2013 | 3,363.2 | 53.4% | 10,768 |
| 2014 | 2,632.4 | 40.3% | 10,903 |
| 2015 | 3,856 | 60.3% | 10,268 |
| 2016 | 3,709 | 57.8% | 10,342 |
| 2017 | 4,019.1 | 63.9% | 10,253 |
| 2018 | 3,735.8 | 58.8% | 10,260 |
| 2019 | 3,790.7 | 59.7% | 10,907 |
| 2020 | 2,520.6 | 40.4% | 10,962 |
| 2021 | 4,175.5 | 66.9% | 10,550 |
| 2022 | 3,450.7 | 54.0% | 10,703 |
| 2023 | 3,140.6 | 50.8% | 11,070 |
| 2024 | 1,893.5 | 30.8% | 11,316 |
| 2025 | 2,832.7 | 45.3% | 10,947 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Steam Coal | ST | 725.9 | 714.1 | May 1981 | Operating | — | coming soon |
Owner / operator
Operator: Interstate Power and Light Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| MidAmerican Energy Co | 52.0% | 378 MW |
| Interstate Power and Light Co | 48.0% | 348 MW |
Nearby plants
Within 80 km.
| Cargill Corn Milling Division | 40 MW | 9 km |
| Ottumwa City of | 3 MW | 14.8 km |
| Bloomfield Municipal Utilities Solar | 2 MW | 39.5 km |
| Prairie Wind Farm | 168 MW | 39.9 km |
| Bloomfield | 9 MW | 45.1 km |
| Red Rock Hydro Plant | 55 MW | 46.8 km |