Ottumwa
Coal power plant in Wapello County, Iowa. 725.9 MW of nameplate capacity across 1 generator, operated by Interstate Power and Light Co.
Also known as Ottumwa Generating Station · EIA plant 6254
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 725.9 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- May 1981First generator online
- Operator
- Interstate Power and Light CoEIA operator ID 9417
- Grid
- MISOBalancing authority MISO
- Price nodes
- 2 MISO nodesResource nodes with prices
- Location
- Wapello County, IA41.0961, −92.5558
- EIA plant ID
- 6254EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Ottumwa produces
Free · EIA-923Net generation, 2025
2.83 TWh
2,832,694 MWh, final
Capacity factor, 2025
44.5%
2024: 29.7%
January to July 2026
1.81 TWh
Provisional
Range, 2015 to 2025
1.9–4.2
TWh a year. Low 2024, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 4,649,990 | Not reported | 12 of 12 |
| 2001 | 4,281,058 | Not reported | 12 of 12 |
| 2002 | 4,480,923 | Not reported | 12 of 12 |
| 2003 | 4,779,413 | Not reported | 12 of 12 |
| 2004 | 4,179,388 | Not reported | 12 of 12 |
| 2005 | 3,240,977 | Not reported | 12 of 12 |
| 2006 | 3,952,075 | Not reported | 12 of 12 |
| 2007 | 3,794,410 | Not reported | 12 of 12 |
| 2008 | 4,206,580 | Not reported | 12 of 12 |
| 2009 | 3,759,760 | Not reported | 12 of 12 |
| 2010 | 3,727,920 | 58.6% | 12 of 12 |
| 2011 | 3,408,573 | Not reported | 12 of 12 |
| 2012 | 2,914,585 | 45.7% | 12 of 12 |
| 2013 | 3,363,217 | 52.9% | 12 of 12 |
| 2014 | 2,632,396 | 41.4% | 12 of 12 |
| 2015 | 3,855,966 | 60.6% | 12 of 12 |
| 2016 | 3,708,987 | 58.2% | 12 of 12 |
| 2017 | 4,019,132 | 63.2% | 12 of 12 |
| 2018 | 3,735,791 | 58.7% | 12 of 12 |
| 2019 | 3,790,697 | 59.6% | 12 of 12 |
| 2020 | 2,520,610 | 39.5% | 12 of 12 |
| 2021 | 4,175,485 | 65.7% | 12 of 12 |
| 2022 | 3,450,747 | 54.3% | 12 of 12 |
| 2023 | 3,140,616 | 49.4% | 12 of 12 |
| 2024 | 1,893,500 | 29.7% | 12 of 12 |
| 2025 | 2,832,694 | 44.5% | 12 of 12 |
| 2026 (provisional, partial year) | 1,813,107 | 49.1% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
3.39M
US short tons. 2024: 2.33M
SO₂, 2025
855
US short tons
NOx, 2025
845
US short tons
CO₂ per MWh, calculated
1.20 t
About 2,392 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (1), matched to EIA plant 6254 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
982
million gallons
Consumption, 2024
869
million gallons
Source
Des Moines River
Surface, Fresh. Induced-draft tower
Watershed stress
Low · 0.245
USGS SUI, HUC12 Middle Avery Creek
8 of 12 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Steam Coal | 725.9 | May 1981 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Interstate Power and Light Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Ottumwa
More plants operated by Interstate Power and Light Co
Questions about Ottumwa
How much power does Ottumwa produce?
Ottumwa reported 2,832,694 MWh (2.83 TWh) of net generation in 2025, a 44.5% capacity factor on 725.9 MW of nameplate capacity. From January to July 2026 it reported 1.81 TWh, which is provisional.
Where is Ottumwa?
Ottumwa is in Wapello County, Iowa, at 41.0961, −92.5558. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Ottumwa?
EIA-860M for August 2026 lists Interstate Power and Light Co as the operator (EIA operator ID 9417). The operator is not always the owner.
When did Ottumwa start operating?
Its first generator began operating in May 1981, according to EIA-860M.
Does InfraMap have power prices for Ottumwa?
Yes. InfraMap has MISO day-ahead and real-time prices at 2 price nodes linked to Ottumwa, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page