Marshalltown

3001 E. Main St Rd, Marshalltown, IA 50158

Plant Summary Information

Marshalltown is ranked #17 out of 50 natural gas power plants in Iowa in terms of total annual net electricity generation.

Marshalltown is comprised of 3 generators and generated 4.0 GWh during the 3-month period between September 2025 to December 2025.

Plant Name	Marshalltown
Utility Name	Interstate Power and Light Co
Location	Marshall County, IA
Initial Operation Date	June 1978
Last Update	Dec 2025
Annual Generation	20.3 GWh
Annual Consumption	342.5 k MMBtu
Ranked #5,346 out of 13,081 Power Plants Nationwide
Ranked #1,377 out of 2,206 Natural Gas Power Plants Nationwide
Ranked #124 out of 283 Iowa Power Plants
Ranked #17 out of 50 Iowa Natural Gas Power Plants
Fuel Types	Natural Gas

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Summary Information
Plant Name	Marshalltown (1068)
Plant Address	3001 E. Main St Rd, Marshalltown, IA 50158
Utility	Interstate Power and Light Co (9417)
Latitude, Longitude	42.0474, -92.85944
Generation Dates on File	Jan 2001 to Dec 2025
Initial Operation Date	June 1978
Annual Generation	20.3 GWh
Fuel Types	Natural Gas

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	MRO
Balancing Authority	Midcontinent Independent Transmission System Operator, Inc.. (MISO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source
Ash Impoundment	No
Transmission / Distribution Owner	ITC Midwest LLC (56161)
Grid Voltage	115.00 kV / 161.00 kV
Energy Storage	No

Natural Gas Information
Pipeline Name	NORTHERN BORDER P L CO
Natural Gas Storage	No

* Data obtained from the 2025 EIA 860 Report

Technology	Natural Gas Fired Combustion Turbine
Prime Mover	Combustion Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	ALTW.MTOWNCT1
RTO ISO Location Designation For Reporting Wholesale Sales Data	ALTW.MTOWNCT1
Nameplate Capacity	63 MW
Nameplate Power Factor	0.9
Summer Capacity	51.2 MW
Winter Capacity	65.8 MW
Minimum Load	15 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	June 1978
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No
Cofire Fuels	No

Technology	Natural Gas Fired Combustion Turbine
Prime Mover	Combustion Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	ALTW.MTOWNCT2
RTO ISO Location Designation For Reporting Wholesale Sales Data	ALTW.MTOWNCT2
Nameplate Capacity	63 MW
Nameplate Power Factor	0.9
Summer Capacity	52.1 MW
Winter Capacity	67 MW
Minimum Load	15 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	June 1978
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No
Cofire Fuels	No

Technology	Natural Gas Fired Combustion Turbine
Prime Mover	Combustion Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	ALTW.MTOWNCT3
RTO ISO Location Designation For Reporting Wholesale Sales Data	ALTW.MTOWNCT3
Nameplate Capacity	63 MW
Nameplate Power Factor	0.9
Summer Capacity	53.2 MW
Winter Capacity	59.9 MW
Minimum Load	15 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	July 1978
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No
Cofire Fuels	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Natural Gas.

Rank	Plant Name	Plant Location	Annual Generation
#1367	Hibbing	Hibbing, MN	39.8 GWh
#1368	Tracy 210	Tracy, CA	20.6 GWh
#1369	Bronx Zoo	New York, NY	20.6 GWh
#1370	Brookside Newark	Newark, DE	20.5 GWh
#1371	UI RCP New Haven Fuel Cell	New Haven, CT	20.5 GWh
#1372	Frederickson	Tacoma, WA	20.8 GWh
#1373	Hancock	Commerce Twp, MI	20.4 GWh
#1374	POET Bioprocessing- Mitchell	Mitchell, SD	20.3 GWh
#1375	Nalco	Naperville, IL	20.3 GWh
#1376	South Fond Du Lac	Fond du Lac, WI	20.3 GWh
#1378	Island Street Peaking Plant	Kaukauna, WI	20.2 GWh
#1379	George Neal North	Sergeant Bluff, IA	1.6 TWh
#1380	Elkins Generating Center	Elkins, AR	20.2 GWh
#1381	CCCSD Wastewater Treatment Plnt	Martinez, CA	20.2 GWh
#1382	Live Oak Limited	Bakersfield, CA	20.1 GWh
#1383	TLR000 Hansen Fuel Cell	Salinas, CA	19.9 GWh
#1384	Spreckels Sugar Company	Brawley, CA	19.9 GWh
#1385	El Cajon Energy Center	El Cajon, CA	19.8 GWh
#1386	Sagamore Plant Cogeneration	Lafayette, IN	19.8 GWh
#1387	Great Bend - Sunflower	Great Bend, KS	19.8 GWh

Below are closest 20 power plants surrounding Marshalltown.

Plant Name	Plant Location	Annual Generation	Distance
Alliant SBD 9107 JBS USA	Marshalltown, IA	61.7 MWh	2 mi
Brooklyn	Brooklyn, IA	14.0 MWh	30.6 mi
Brooklyn City North Plant	Brooklyn, IA	7.0 MWh	30.3 mi
FPL Energy Story Wind LLC	Zearing, IA	571.3 GWh	21.5 mi
Garden Wind LLC	Zearing, IA	342.8 GWh	29 mi
Grinnell College	Grinnell, IA	1.6 GWh	21.1 mi
Grundy Center City Light Plant	Grundy Center, IA	109.0 MWh	22.3 mi
Ivester Wind Farm	Wellsburg, IA	323.0 GWh	20.2 mi
Laurel Wind Farm	Laurel, IA	470.0 GWh	12 mi
Marshalltown Generating Station	Marshalltown, IA	3.1 TWh	0.7 mi
Optimum Wind 7 LLC	Nevada, IA	9.2 GWh	29.3 mi
Salt Creek Wind	Traer, IA	360.0 GWh	19.6 mi
State Center	State Center, IA	153.0 MWh	15.7 mi
Traer East	Tracer, IA	6.0 MWh	22.2 mi
Traer Main	Traer, IA	65.0 MWh	22.6 mi
Traer South	Traer, IA	12.0 MWh	22.1 mi
Traer Wind Project	Traer, IA	5.6 GWh	22.8 mi
Venus Wind 3 LLC	Grinnell, IA	9.5 GWh	23.2 mi
Vienna Wind Farm	Marshalltown, IA	621.7 GWh	8.8 mi
Wellsburg Wind Project	Wellsburg, IA	304.8 GWh	24.4 mi