In Wapello County, Iowa (IA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

726 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

EIA-860M names Interstate Power and Light Co as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Ottumwa LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Interstate Power and Light Co here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Ottumwa LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Ottumwa still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Ottumwa

Ottumwa is a 726 MW coal power plant in Wapello County, Iowa, operated by Interstate Power and Light Co. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 1981.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 725.9 MW; 714.1 MW net summer
Generating units: 1
In service: 1981
EIA plant ID: 6254

Where it is

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County: Wapello County, Iowa
Coordinates: 41.0961, -92.5558
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: Interstate Power and Light Co
Primary energy source: Coal
Technologies: Conventional Steam Coal
Status: Operating

Every plant Interstate Power and Light Co reports to EIA →

Ottumwa: FAQ

Where is Ottumwa?: In Wapello County, Iowa (IA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Ottumwa?: 726 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Ottumwa?: EIA-860M names Interstate Power and Light Co as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Ottumwa LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Interstate Power and Light Co here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Ottumwa LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Ottumwa still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.