Midcontinent Independent System Operator, Inc.

Balancing Authority Summary Information

Midcontinent Independent System Operator, Inc. is ranked #2 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	Midcontinent Independent System Operator, Inc.
States	Arkansas Illinois Indiana Iowa Kentucky Louisiana Michigan Minnesota Mississippi Missouri Montana North Dakota South Dakota Texas Wisconsin
Last Update	Nov 2025
Annual Generation	655.1 TWh
Power Plants	2,831
Utilities	1,296
Ranked #2 out of 65 in terms of net annual generation
Ranked #2 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 35.7% Coal \| 29% Wind \| 14.9% Nuclear \| 13.9% Solar \| 4.5% Water \| 1.5% Other Fuel \| 0.6%

Map of Midcontinent Independent System Operator, Inc.

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Daily Net Generation for Midcontinent Independent System Operator, Inc. for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Fitchburg	Madison Gas & Electric Co	Madison, WI	14 MWh	Apr 1973	Dec 2024	Natural Gas
Hot Spring Generating Facility	Entergy Arkansas LLC	Malvern, AR	3 TWh	May 2002	Sep 2025	Natural Gas
Magnet Cove	Arkansas Electric Coop Corp	Malvern, AR	4 TWh	Jun 2005	Sep 2025	Natural Gas
Remmel	Entergy Arkansas LLC	Malvern, AR	30 GWh	Dec 1924	Dec 2024	Water
Independence Wind Farm	Independence Wind Energy LLC	Manchester, IA	211 GWh	Nov 2021	Sep 2025	Wind
CED Manchester Wind	Consolidated Edison Development Inc.	Manchester, IA	31 GWh	Mar 2022	Dec 2024	Wind
R M Heskett	Montana-Dakota Utilities Co	Mandan, ND	57 GWh	Oct 1954	Sep 2025	Natural Gas
Oliver Wind III, LLC	Oliver Wind III, LLC	Mandan, ND	381 GWh	Dec 2016	Sep 2025	Wind
Manistique	Cloverland Electric Co-op	Manistique, MI	1 GWh	Jun 1960	Dec 2024	Distillate Fuel Oil
Manitowoc	Manitowoc Public Utilities	Manitowoc, WI	179 GWh	May 1955	Sep 2025	Wood/Wood Waste Solids : 91.2% Petroleum Coke : 4.8% Bituminous Coal : 3.6%
Custer Energy Center	Manitowoc Public Utilities	Manitowoc, WI	6 GWh	May 1999	Dec 2024	Natural Gas
Wilmarth	Northern States Power Co - Minnesota	Mankato, MN	100 GWh	Aug 1948	Sep 2025	Non-biogenic Municipal Solid Waste : 54.3% Biogenic Municipal Solid Waste : 44.4% Natural Gas : 1.3%
Archer Daniels Midland Mankato	Archer Daniels Midland Co	Mankato, MN	22 GWh	Sep 1987	Dec 2024	Natural Gas
Mankato Energy Center	MEC Holdings, LLC	Mankato, MN	3 TWh	Jun 2006	Dec 2024	Natural Gas
USS Peach Solar LLC	United States Solar Corporation	Mankato, MN	2 GWh	Jun 2022	Dec 2024	Solar
MN CSG 2019-16 LLC	MN CSG 2019-16 LLC	Mankato, MN	2 GWh	May 2022	Dec 2024	Solar
USS Jayhawk Solar LLC (CSG)	United States Solar Corporation	Mankato, MN	2 GWh	Nov 2023	Dec 2024	Solar
SolarClub 35 LLC	Nautilus Solar Solutions	Mankato, MN	2 GWh	Nov 2020	Dec 2024	Solar
Primrose Solar, LLC	National Grid Renewables	Mankato, MN	2 GWh	Mar 2021	Dec 2024	Solar
CF Novel Solar CSG Gardens Eleven, LLC	Cypress Creek Renewables	Mankato, MN	5 GWh	Nov 2017	Dec 2024	Solar
Eastwood Solar	Enel Green Power NA, Inc.	Mankato, MN	11 GWh	Nov 2016	Dec 2024	Solar
Corvus Community Solar	Corvus Community Solar	Mankato, MN	8 GWh	Sep 2018	Dec 2024	Solar
School Sisters CSG	School Sisters CSG LLC	Mankato, MN	2 GWh	Apr 2018	Dec 2024	Solar
Roeder Family Wind Farm LLC	Consolidated Edison Development Inc.	Manly, IA	5 GWh	Aug 2011	Dec 2024	Wind
Mansfield Mill	IPC-Mansfield Mill	Mansfield, LA	811 GWh	Sep 1981	Sep 2025	Natural Gas : 55.4% Black Liquor : 30.8% Wood/Wood Waste Solids : 11.8% Tire-derived Fuels : 2.0%
Kankakee Solar 3	Pivot Energy	Manteno, IL	107 MWh	Oct 2024	Dec 2024	Solar
Novel Debra Solar LLC CSG	REA Investments, LLC	Mantorville, MN	2 GWh	Nov 2020	Dec 2024	Solar
Novel Wayne Solar LLC CSG	REA Investments, LLC	Mantorville, MN	2 GWh	Dec 2020	Dec 2024	Solar
Novel Benedix Solar CSG	REA Investments, LLC	Mantorville, MN	2 GWh	Nov 2020	Dec 2024	Solar
Maple Lake	Great River Energy	Maple Lake, MN	176 MWh	Apr 1978	Dec 2024	Distillate Fuel Oil
CED Peoria Solar	Bay4 Energy Services, LLC	Mapleton, IL	4 GWh	Apr 2021	Dec 2024	Solar
Schull CSG	Schull CSG LLC	Mapleton, MN	2 GWh	Oct 2021	Dec 2024	Solar
Novel - OYA of Mapleton CSG	NRG MN Community LLC	Mapleton, MN	6 GWh	Jun 2018	Dec 2024	Solar
Mapleton Community Solar	Mapleton Community Solar	Mapleton, MN	5 GWh	May 2017	Dec 2024	Solar
Iowa Hydro LLC	Renewable World Energies LLC	Maquoketa, IA	6 GWh	Dec 1923	Sep 2025	Water
Marceline	City of Marceline - (MO)	Marceline, MO	4 MWh	Jul 1989	Dec 2024	Distillate Fuel Oil
Park Mill	Eagle Creek Renewable Energy, LLC	Marinette, WI	9 GWh	Dec 1919	Dec 2024	Water
Marion	Southern Illinois Power Coop	Marion, IL	762 GWh	May 1963	Sep 2025	Bituminous Coal : 85.9% Natural Gas : 14.0%
SV CSG Barrass Farms II LL	SV CSG Barrass Farms II LLC	Marion, IL	4 GWh	Aug 2023	Dec 2024	Solar
Alliant SBD 8602 Marion Sub	Industrial Energy Applications Inc	Marion, IA	19 MWh	Jul 1986	Dec 2024	Distillate Fuel Oil
Prairie State Generating Station	Prairie State Generating Co LLC	Marissa, IL	11 TWh	May 2012	Sep 2025	Bituminous Coal : 99.8%
James R Smith	City of Marquette - (MI)	Marquette, MI	13 GWh	Dec 1918	Dec 2024	Water
Plant Four	City of Marquette - (MI)	Marquette, MI	2 MWh	Apr 1979	Dec 2024	Distillate Fuel Oil
McClure Dam	Upper Peninsula Power Company	Marquette, MI	32 GWh	Jan 1988	Dec 2024	Water
Marquette Energy Center	City of Marquette - (MI)	Marquette, MI	162 GWh	Jul 2017	Dec 2024	Natural Gas : 99.2% Distillate Fuel Oil : 0.8%
Marshall (IL)	City of Marshall - (IL)	Marshall, IL	116 MWh	Mar 2002	Dec 2024	Distillate Fuel Oil
Marshall (MI)	City of Marshall - (MI)	Marshall, MI	704 MWh	May 1928	Dec 2024	Water
GRS C&C	Gas Recovery Systems Inc	Marshall, MI	21 GWh	Jan 1995	Dec 2024	Landfill Gas
Marshall (MN)	City of Marshall - (MN)	Marshall, MN	60 MWh	Jun 1969	Dec 2024	Distillate Fuel Oil
Marshall Wind 1 LLC	Marshall Wind Farm, LLC	Marshall, MN	3 GWh	Nov 2007	Dec 2024	Wind
Marshall Wind 6 LLC	Marshall Wind Farm, LLC	Marshall, MN	3 GWh	Nov 2007	Dec 2024	Wind
Marshall Wind 5 LLC	Marshall Wind Farm, LLC	Marshall, MN	2 GWh	Nov 2007	Dec 2024	Wind
Marshall Wind 4 LLC	Marshall Wind Farm, LLC	Marshall, MN	6 GWh	Nov 2007	Dec 2024	Wind
Marshall Wind 3 LLC	Marshall Wind Farm, LLC	Marshall, MN	6 GWh	Nov 2007	Dec 2024	Wind
Marshall Solar Energy Project	Marshall Solar Energy Project	Marshall, MN	96 GWh	Dec 2016	Sep 2025	Solar
Marshall Wind 2 LLC	Marshall Wind Farm, LLC	Marshall, MN	6 GWh	Nov 2007	Dec 2024	Wind
Marshall Solar Plus LLC	Western Minnesota Mun Pwr Agny	Marshall, MN	539 MWh	Nov 2024	Dec 2024	Solar
Marshalltown	Interstate Power and Light Co	Marshalltown, IA	79 GWh	May 1978	Dec 2024	Natural Gas
Alliant SBD 9107 JBS USA	Industrial Energy Applications Inc	Marshalltown, IA	62 MWh	Jul 1992	Sep 2025	Distillate Fuel Oil
Vienna Wind Farm	MidAmerican Energy Co	Marshalltown, IA	398 GWh	Oct 2012	Dec 2024	Wind
Marshalltown Generating Station	Interstate Power and Light Co	Marshalltown, IA	3 TWh	Mar 2017	Sep 2025	Natural Gas : 99.9%
Marshfield Utilities Gas Plant	City of Marshfield - (WI)	Marshfield, WI	4 GWh	May 2011	Dec 2024	Natural Gas
Eagle Valley (IN)	AES Indiana	Martinsville, IN	6 TWh	Nov 1951	Sep 2025	Natural Gas
Dakota Range Wind	Northern States Power Co - Minnesota	Marvin, SD	896 GWh	Dec 2021	Sep 2025	Wind
Salt Creek Township Solar, LLC	Birch Creek Power, LLC	Mason City, IL	86 GWh	-	Sep 2025	Solar
Glacier Sands Wind Power, LLC	Glacier Sands Wind Power, LLC	Mason City, IL	635 GWh	Oct 2021	Sep 2025	Wind
Moraine Sands Wind Power	Moraine Sands Wind Power, LLC	Mason City, IL	577 GWh	Nov 2023	Sep 2025	Wind
Lime Creek	Interstate Power and Light Co	Mason City, IA	115 MWh	Apr 1991	Aug 2024	Distillate Fuel Oil
CED Mason City Wind	Consolidated Edison Development Inc.	Mason City, IA	24 GWh	Apr 2020	Dec 2024	Wind
Blue Elk II Solar, LLC	Blue Elk II Solar, LLC	Mason, MI	26 GWh	Apr 2024	Dec 2024	Solar
Rolling Hills Wind Farm	MidAmerican Energy Co	Massena, IA	2 TWh	Nov 2011	Sep 2025	Wind
Elroy Solar	Butter Solar, LLC	Mauston, WI	2 GWh	Aug 2019	Dec 2024	Solar
Lemonweir (Oak 1)	Greenbacker Renewable Energy Corporation	Mauston, WI	6 GWh	Nov 2023	Dec 2024	Solar
USS Dressen Family Solar LLC	United States Solar Corporation	Mayer, MN	2 GWh	Jun 2023	Dec 2024	Solar
Wolverine Solar	Wolverine Solar, LLC	Maynard, MN	2 GWh	Oct 2023	Dec 2024	Solar
Centaurus Community Solar	Centaurus Community Solar	Maynard, MN	3 GWh	Aug 2017	Dec 2024	Solar
Butler Ridge	Butler Ridge Wind Energy Center	Mayville, WI	140 GWh	Jan 2009	Sep 2025	Wind
Rochester Hydro	Rochester Public Utilities	Mazeppa, MN	10 GWh	Aug 1984	Dec 2024	Water
Novel Sunnyfield Farms Solar LLC CSG	REA Investments, LLC	Mazeppa, MN	2 GWh	May 2022	Dec 2024	Solar
Siems Solar Project CSG	Siems Community Solar LLC	Mazeppa, MN	2 GWh	Jul 2020	Dec 2024	Solar
National Energy of McBain	National Salvage & Service Corporation	McBain, MI	122 GWh	Nov 1988	Dec 2024	Wood/Wood Waste Solids : 88.5% Tire-derived Fuels : 11.2%
Stoney Corners Wind Farm	DTE Sustainable Generation	McBain, MI	127 GWh	Nov 2009	Dec 2024	Wind
McGregor	City of McGregor- (IA)	McGregor, IA	7 MWh	Nov 1941	Dec 2024	Distillate Fuel Oil
Pioneer Prairie Wind Farm	Pioneer Prairie Wind Farm I, LLC	McIntire, IA	865 GWh	Sep 2008	Sep 2025	Wind
Anchor Wind, LLC	Acciona Energy USA Global, LLC	Mechanicsville, IA	6 GWh	Sep 2012	May 2024	Wind
Medford DPC Solar	SoCore Energy LLC	Medford, WI	3 GWh	Jan 2017	Sep 2025	Solar
New Munich Solar	New Munich Solar LLC	Melrose, MN	2 GWh	Aug 2019	Dec 2024	Solar
USS Midtown Solar LLC CSG	Standard Solar	Melrose, MN	2 GWh	Nov 2019	Dec 2024	Solar
Melrose 2	Melrose Public Utilities	Melrose, MN	3 MWh	Feb 2014	Dec 2024	Distillate Fuel Oil
Melrose	Melrose Public Utilities	Melrose, MN	49 MWh	Jun 1945	Dec 2024	Distillate Fuel Oil
Heartland Divide Wind Project, LLC	Heartland Divide Wind Project, LLC	Melville, IA	424 GWh	Nov 2018	Sep 2025	Wind
Menominee Mill Marinette	Eagle Creek Renewable Energy, LLC	Menominee, MI	12 GWh	Dec 1923	Sep 2025	Water
Harley-Davison Powertrain Operations	Wisconsin Electric Power Co	Menomonee Falls, WI	3 GWh	Sep 2020	Dec 2024	Solar
Downsville DPC Solar	SoCore Energy LLC	Menomonee, WI	2 GWh	Jan 2017	Sep 2025	Solar
Cedar Falls (WI)	Northern States Power Co - Minnesota	Menomonie, WI	34 GWh	Dec 1909	Dec 2024	Water
Menomonie	Northern States Power Co - Minnesota	Menomonie, WI	24 GWh	Dec 1957	Dec 2024	Water
Bayou Galion Solar Project	Bayou Galion Solar Project, LLC	Mer Rouge, LA	211 GWh	Oct 2024	Sep 2025	Solar
Morgan Solar 1 CSG	Morgan Solar 1 LLC	Meredosia, IL	4 GWh	Jul 2021	Dec 2024	Solar
Morgan Solar 1b CSG	Morgan Solar 1b LLC	Meredosia, IL	3 GWh	Jul 2021	Dec 2024	Solar
Meridian Wind Park	DTE Electric Company	Merrill, MI	501 GWh	Mar 2023	Sep 2025	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	696.7 GWh	4
#27	Associated Electric Cooperative, Inc.	23.6 TWh	47
#13	Duke Energy Carolinas	112.5 TWh	565
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.4 TWh	25
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#5	Southwest Power Pool	299.9 TWh	835
#49	Southwestern Power Administration	5.2 TWh	34
#9	Tennessee Valley Authority	161.6 TWh	204

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#2	Midcontinent Independent System Operator, Inc.	655.1 TWh	2,831
#4	Electric Reliability Council of Texas, Inc.	485.0 TWh	1,313
#5	Southwest Power Pool	299.9 TWh	835
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#7	California Independent System Operator	188.0 TWh	2,075
#9	Tennessee Valley Authority	161.6 TWh	204
#10	Florida Power & Light Co.	148.9 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565