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%

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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
Trigen St. Louis	Centerstream STL, LLC	St Louis, MO	86 GWh	May 1999	Jul 2025	Natural Gas
Diamond Willow Wind Facility	Montana-Dakota Utilities Co	Baker, MT	86 GWh	Nov 2007	Dec 2024	Wind
Pleasant Valley (MN)	Great River Energy	Dexter, MN	86 GWh	Apr 2001	Dec 2024	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Prairie Creek	Interstate Power and Light Co	Cedar Rapids, IA	86 GWh	Sep 1958	Sep 2025	Subbituminous Coal : 64.8% Natural Gas : 35.2%
Ewington Energy Systems, LLC	Ewington Energy Systems, LLC	Worthington, MN	86 GWh	Dec 2007	Dec 2024	Wind
Weston RICE	Wisconsin Public Service Corp	Kronenwetter, WI	85 GWh	Jun 2023	Dec 2024	Natural Gas
Expander Turbine	Cleveland Cliffs	East Chicago, IN	85 GWh	Apr 1981	Sep 2025	Blast Furnace Gas
Storm Lake 1	ALLETE Clean Energy	Alta, IA	85 GWh	Apr 1999	Dec 2024	Wind
Purdue University	Purdue University	West Lafayette, IN	84 GWh	Dec 1968	Sep 2025	Natural Gas : 90.8% Bituminous Coal : 9.2%
Louise Solar	National Grid Renewables	Taopi, MN	83 GWh	Nov 2024	Sep 2025	Solar
Cornell	Northern States Power Co - Minnesota	Chippewa Falls, WI	82 GWh	Jun 1976	Dec 2024	Water
Rock Aetna Power Partners	Northern States Power Co - Minnesota	Woodstock, MN	82 GWh	Nov 2022	Dec 2024	Wind
Blanchard	ALLETE, Inc.	Royalton, MN	82 GWh	Jan 1925	Dec 2024	Water
Ridgewind	Ridgewind Power Partners LLC	Woodstock, MN	81 GWh	Dec 2010	Dec 2024	Wind
Flying Cloud Power Partners LLC	Avangrid Power LLC	Lake Park, IA	81 GWh	Nov 2003	Dec 2024	Wind
Iowa State University	Iowa State University	Ames, IA	81 GWh	Sep 1960	Sep 2025	Natural Gas
Grandfather Falls	Wisconsin Public Service Corp	Irma, WI	80 GWh	Nov 1938	Dec 2024	Water
Metro Methane Recovery Facility	WM Renewable Energy LLC	Mitchellville, IA	80 GWh	Dec 1997	Sep 2025	Landfill Gas
Omega Hills Gas Recovery	WM Renewable Energy LLC	Germantown, WI	80 GWh	Nov 1985	Sep 2025	Landfill Gas
Pinckneyville	Union Electric Co - (MO)	Pinckneyville, IL	80 GWh	May 2000	Dec 2024	Natural Gas
Marshalltown	Interstate Power and Light Co	Marshalltown, IA	79 GWh	May 1978	Dec 2024	Natural Gas
Agrilectric Power Partners Ltd	Agrilectric Power Partners Ltd	Lake Charles, LA	79 GWh	Jun 1984	Dec 2024	Agricultural By-Products : 98.9% Natural Gas : 1.1%
Archer Daniels Midland Peoria	BioUrja Renewables LLC	Peoria, IL	79 GWh	Dec 1987	Dec 2024	Natural Gas
Pine Tree Acres WM LFGTE	WM Renewable Energy LLC	Lenox, MI	79 GWh	Feb 2012	Sep 2025	Landfill Gas
Old Gold Energy Center, LLC	Old Gold Energy Center, LLC	Joice, IA	78 GWh	Sep 2001	Dec 2024	Wind
Envoy Solar, LLC	Birch Creek Power, LLC	Mexico, MO	78 GWh	-	Sep 2025	Solar
Jonesboro City Water & Light Plant	City Water and Light Plant	Jonesboro, AR	78 GWh	Jun 1999	Dec 2024	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Gibson Solar	Gibson Solar, LLC	Princeton, IN	76 GWh	-	Sep 2025	Solar
Fillmore County Solar Project	National Grid Renewables	Spring Valley, MN	76 GWh	Nov 2024	Sep 2025	Solar
Earp Solar, LLC	Birch Creek Power, LLC	Monmouth, IL	75 GWh	Mar 2024	Sep 2025	Solar
Heritage Garden Wind Farm I LLC	DTE Sustainable Generation	Garden, MI	75 GWh	Aug 2012	Dec 2024	Wind
MMSD Jones Island Wastewater	Milwaukee Metro Sewerage Dist	Milwaukee, WI	74 GWh	Dec 1970	Sep 2025	Natural Gas : 79.4% Landfill Gas : 19.3% Distillate Fuel Oil : 1.3%
Coffeen Solar BESS	Vistra Corp	Coffeen, IL	74 GWh	Nov 2024	Sep 2025	Solar
Moraine II Wind LLC	Avangrid Power LLC	Woodstock, MN	73 GWh	Jan 2009	Dec 2024	Wind
Hoot Lake Solar	Otter Tail Power Co	Fergus Falls, MN	73 GWh	Jul 2023	Sep 2025	Solar
Elk River	Great River Energy	Elk River, MN	73 GWh	Dec 1950	Sep 2025	Natural Gas : 99.1% Distillate Fuel Oil : 0.9%
Hardy	Consumers Energy Co - (MI)	Newaygo, MI	72 GWh	May 1931	Dec 2024	Water
Western Michigan University Power Plant	Western Michigan University	Kalamazoo, MI	70 GWh	Jul 1997	Dec 2024	Natural Gas
Summit Lake	Central Iowa Power Cooperative	Creston, IA	70 GWh	Feb 1951	Dec 2024	Natural Gas : 99.9%
Big Blue	Big Blue Wind Farm LLC (MN)	Blue Earth, MN	70 GWh	Nov 2012	Dec 2024	Wind
Big Turtle Wind Farm, LLC	DTE Sustainable Generation	Harbor Beach, MI	70 GWh	Nov 2014	Dec 2024	Wind
Tilton	Tilton Energy LLC	Tilton, IL	69 GWh	May 1999	Dec 2024	Natural Gas
D G Hunter	City of Alexandria - (LA)	Alexandria, LA	69 GWh	Apr 1965	Dec 2024	Natural Gas
Pine River Solar Park	DTE Electric Company	Alma, MI	67 GWh	-	Sep 2025	Solar
Franklin Heating Station	Franklin Heating Station	Rochester, MN	67 GWh	Dec 1950	Sep 2025	Natural Gas : 79.1% Purchased Steam : 19.3% Distillate Fuel Oil : 1.6%
Altona Solar, LLC	Birch Creek Power, LLC	Centralia, MO	67 GWh	Jul 2024	Sep 2025	Solar
Inver Hills	Northern States Power Co - Minnesota	Inver Grove Heights, MN	64 GWh	Mar 1972	Dec 2024	Natural Gas : 99.7%
Lakefield Junction	Great River Energy	Trimont, MN	64 GWh	May 2001	Dec 2024	Natural Gas
The Andersons Albion Ethanol LLC	The Andersons Albion Ethanol LLC	Albion, MI	63 GWh	Jul 2006	Dec 2024	Natural Gas
Sumpter Energy Associates	NextEra Renewable Fuels, LLC	Belleville, MI	63 GWh	Jun 1992	Dec 2024	Landfill Gas
Pine Tree Acres	NextEra Renewable Fuels, LLC	Lenox Twp, MI	63 GWh	May 1998	Sep 2025	Landfill Gas
Chippewa Falls	Northern States Power Co - Minnesota	Chippewa Falls, WI	63 GWh	Dec 1927	Dec 2024	Water
Richland Township Solar, LLC	Birch Creek Power, LLC	Washburn, IL	62 GWh	-	Sep 2025	Solar
Flambeau Hydroelectric Station	Dairyland Power Coop	Ladysmith, WI	62 GWh	Dec 1950	Dec 2024	Water
Moraine Wind LLC	Avangrid Power LLC	Woodstock, MN	61 GWh	Nov 2003	Dec 2024	Wind
French Island	Northern States Power Co - Minnesota	La Cross, WI	60 GWh	Dec 1939	Sep 2025	Wood/Wood Waste Solids : 47.5% Non-biogenic Municipal Solid Waste : 28.4% Biogenic Municipal Solid Waste : 23.3%
Prairie Creek Solar	Sol Systems	Jacksonville, IL	60 GWh	Oct 2023	Sep 2025	Solar
Shirley Wind	Duke Energy Renewables Services	Denmark, WI	60 GWh	Oct 2010	Dec 2024	Wind
PPG Riverside	Westlake 2 US LLC	Lake Charles, LA	59 GWh	Aug 1947	Jul 2025	Purchased Steam
Winnebago Wind Power Project	Avangrid Power LLC	Forest City, IA	59 GWh	Aug 2008	Dec 2024	Wind
Crossover Wind	Crossover Wind, LLC	Wynne, AR	58 GWh	-	Sep 2025	Wind
Kilbourn	Wisconsin Power & Light Co	Wisconsin Dells, WI	58 GWh	Jun 1926	Dec 2024	Water
R M Heskett	Montana-Dakota Utilities Co	Mandan, ND	57 GWh	Oct 1954	Sep 2025	Natural Gas
Saint Marys Hospital Power Plant	St Mary's Hospital	Rochester, MN	57 GWh	Dec 1970	Sep 2025	Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
Little Quinnesec Falls Hydro Project	Eagle Creek Renewable Energy, LLC	Niagara, WI	57 GWh	Nov 1900	Dec 2024	Water
Montfort Wind Energy Center	Wisconsin Electric Power Co	Montfort, WI	56 GWh	May 2002	Sep 2025	Wind
Cedar Hills Wind Farm	Montana-Dakota Utilities Co	Rhame, ND	56 GWh	May 2010	Dec 2024	Wind
Grant County Wind LLC	Grant County Wind, LLC	Woodstock, MN	55 GWh	Jul 2010	Dec 2024	Wind
Fond Du Lac	ALLETE, Inc.	Duluth, MN	54 GWh	Dec 1923	Dec 2024	Water
C W Tippy	Consumers Energy Co - (MI)	Wellston, MI	54 GWh	Dec 1917	Dec 2024	Water
Carroll Area Wind Farm	SRIV Partnership LLC	Templeton, IA	54 GWh	Dec 2014	Dec 2024	Wind
Ivanhoe Generation Facility	Orion Engineered Carbons	Franklin, LA	53 GWh	Mar 2023	Dec 2024	Waste Heat
Hargis-Hebert Electric Generating	Lafayette Utilities System	Lafayette, LA	53 GWh	May 2006	Dec 2024	Natural Gas
McKinley Wind Park	DTE Electric Company	Pigeon, MI	52 GWh	Nov 2012	Sep 2025	Wind
South Fork Wind Farm	South Fork Wind, LLC	Round Lake, MN	52 GWh	Nov 2016	Dec 2024	Wind
Benndale	Cooperative Energy	Benndale, MS	52 GWh	Sep 1969	Dec 2024	Natural Gas
Grand Blanc Generating Station	Energy Developments, Inc d/b/a EDL	Grand Blanc, MI	52 GWh	Jun 1994	Dec 2024	Landfill Gas
Koda Biomass Plant	Koda Energy LLC	Shakopee, MN	51 GWh	Apr 2009	Dec 2024	Agricultural By-Products : 69.2% Wood/Wood Waste Solids : 22.8% Natural Gas : 8.1%
Brent Run Generating Station	Energy Developments, Inc d/b/a EDL	Montrose, MI	51 GWh	Dec 1997	Dec 2024	Landfill Gas
Interstate	City of Springfield - (IL)	Springfield, IL	51 GWh	Aug 1997	Dec 2024	Natural Gas : 99.9%
St. Cloud Hydro	St. Cloud Hydroelectric Generation Facility	St Cloud, MN	51 GWh	May 1988	Dec 2024	Water
Wisconsin Rapids	Consolidated Water Power Co	Wisconsin Rapids, WI	50 GWh	Dec 1902	Dec 2024	Water
Blount Street	Madison Gas & Electric Co	Madison, WI	49 GWh	May 1957	Dec 2024	Natural Gas
Pheasant Run Landfill Gas Recovery	WM Renewable Energy LLC	Bristol, WI	48 GWh	Jan 1992	Dec 2024	Landfill Gas
Kalkaska CT #1	Michigan Public Power Agency	Kalkaska, MI	48 GWh	Nov 2002	Dec 2024	Natural Gas
New Badger	City of Kaukauna	Kaukauna, WI	47 GWh	Dec 2013	Sep 2025	Water
International Falls Power	Boise White Paper LLC	International Falls, MN	47 GWh	Dec 1923	Sep 2025	Water
Taconite Ridge 1 Wind Energy Center	ALLETE, Inc.	Mountain Iron, MN	47 GWh	Apr 2008	Dec 2024	Wind
Hennepin Island	Northern States Power Co - Minnesota	Minneapolis, MN	47 GWh	Sep 1954	Dec 2024	Water
Olmsted Waste Energy	Olmsted County Public Works	Rochester, MN	47 GWh	Mar 1987	Dec 2024	Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.5%
Danielson Wind Farms LLC	BEAM US, LLC	Cosmos, MN	47 GWh	Feb 2011	Dec 2024	Wind
Adams Wind Generations LLC	BEAM US, LLC	Cosmos, MN	46 GWh	Feb 2011	Dec 2024	Wind
Polaris Solar Park	DTE Electric Company	Ashley, MI	46 GWh	-	Sep 2025	Solar
Arbor Hill Solar	MidAmerican Energy Co	Greenfield, IA	46 GWh	Dec 2021	Sep 2025	Solar
St. James Solar (LA)	St. James Solar, LLC	Vacherie, LA	45 GWh	Jan 2023	Dec 2024	Solar
Top of Iowa Windfarm III	Madison Gas & Electric Co	Kensett, IA	44 GWh	Jan 2008	Dec 2024	Wind
West Marinette 34	Madison Gas & Electric Co	Peshtigo, WI	44 GWh	May 2000	Dec 2024	Natural Gas
Otter Creek Ethanol Poet - Ashton	Otter Creek Ethanol LLC - Poet Ashton	Ashton, IA	43 GWh	Feb 2004	Sep 2025	Natural Gas
Combined Locks	City of Kaukauna	Combined Locks, WI	43 GWh	Jan 1988	Dec 2024	Water
Port Allen (LA)	Placid Refining Co LLC	Port Allen, LA	43 GWh	Apr 1990	Dec 2024	Natural Gas

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