# Ottumwa

MISO asset profile · https://askthegrid.com/assets/facilities/ottumwa

## Current generation inventory

EIA plant 6254 · Inventory reporting month: 2026-08.

- coal: 725.9 MW operating nameplate
- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T02:12:40.665346+00:00
- Filed coordinate (longitude, latitude): -92.55583, 41.0961
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2023-01-25 04:37:37+00:00
- Map prepared: 2026-10-10T02:28:20.823804+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Ottumwa Generating Station is a single-unit coal-fired plant in Ottumwa, Iowa, with a boiler installed in 1981. A renovation costing $491 million added spray dryer scrubbers, completed in November 2014, and a modernized steam turbine upgraded to 790 MW gross.

## Reviewed metrics

- **Nameplate capacity:** 725.9 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 6254 — plant-6254

## Facts

- **Technology:** Conventional Steam Coal
- **Operator:** Interstate Power and Light
- **Operating status:** Operating

## Related parties

- **Parent company:** Alliant Energy — parent_company ([source](https://www.alliantenergy.com))
- **Parent company:** Berkshire Hathaway Energy — parent_company ([source](https://www.brkenergy.com))
- **Equipment supplier:** Toshiba — equipment_supplier ([source](https://www.toshiba.com))

## Sources

- [powermag.com](https://www.powermag.com/ottumwa-generating-station-ottumwa-iowa/) — powermag.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/ottumwa
Website: [Interstate Power and Light](https://www.alliantenergy.com)

Source: Ask the Grid — https://askthegrid.com/