Power plant · Iowa, United States

Milton L Kapp Power Plant

Milton L Kapp Power Plant is a closed gas power plant in Iowa, United States, with 237 MW of capacity, operated by Interstate Power and Light Co.

Grid connection

It closed in 2018, which freed up a 237 MW grid connection at 161 kV to the grid of ITC Midwest LLC, unless it has been reassigned since.

Retiring power plants in the United States

Facts

Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.

Fact	Value	Source
Location	Iowa	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Status	Closed	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Start year	1947	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
End year	2018	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Operator	Interstate Power and Light Co	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Capacity	237 MW (nameplate of its retired generators)	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Technology	Natural Gas Steam Turbine	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Grid operator	ITC Midwest LLC	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Voltage	161 kV	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026
Coordinates	41.8081, -90.2336	EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026

Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.

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How it compares

Milton L Kapp is the 14th-largest of 19 power plants in Iowa and the 893rd-largest of 1,009 in the United States by capacity; its 237 MW is <0.1% of the 917,512 MW we hold for the United States. Ranks and totals cover the power plants in our data that report their capacity, not every one in existence. Power plants planned, permitted or under construction are ranked apart.

Within	Rank	Total	Share
Iowa	14th of 19	9,232 MW	2.6%
United States	893rd of 1,009	917,512 MW	<0.1%
All power plants in our data	1,766th of 15,799	1,918,113 MW	<0.1%

Timeline

Dated facts about this power plant from its sources, oldest first.

1947Started operating
2018Retired

Nearby

Within 50 km of this power plant: 1 data center, measured from the coordinates in the facts above.

Name	Kind	Size	Status	Distance
Geneseo Communications Inc	Data center	—	—	35 km

Operator, grid operator and place

Other power plants in Iowa

All 24 power plants in Iowa, United States

Data on this page

Contains public sector information licensed under the Open Government Licence v3.0. DUKES 5.11: Power stations in the United Kingdom, Open Government Licence v3.0.
Contains public sector information licensed under the Open Government Licence v3.0. DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
JRC Open Power Plants Database (JRC-PPDB-OPEN), European Commission, Joint Research Centre. JRC Open Power Plants Database (JRC-PPDB-OPEN), CC BY 4.0.
Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
Dutch power station owners' and operators' pages. Dutch power station owners' and operators' pages, Facts only, each linked to its page.
Contains public sector information licensed under the Open Government Licence v3.0. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.
Wikidata. Wikidata, CC0 1.0.