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	655.2 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 \| 35.8% Coal \| 29% Wind \| 14.8% Nuclear \| 13.9% Solar \| 4.4% 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
Posey Solar	Southern Indiana Gas & Elec Co	Mount Vernon, IN	167 GWh	-	Aug 2025	Solar
Coldwater River Solar	Coldwater River Solar, LLC	Coldwater, MI	4 GWh	-	Aug 2025	Solar
Winfield Solar	Winfield Solar I, LLC	Winfield, MO	114 GWh	-	Aug 2025	Solar
Speedway Solar, LLC	Speedway Solar, LLC	Morrison Town, IN	134 GWh	-	Aug 2025	Solar
Sauk Solar Park	DTE Electric Company	Union City, MI	188 GWh	-	Aug 2025	Solar
Amite Solar, LLC	Amite Solar, LLC	Roseland, LA	120 GWh	-	Aug 2025	Solar
Eldorado Solar I	Sol Systems	Eldorado, IL	228 GWh	-	Aug 2025	Solar
Unbridled Solar	National Grid Renewables	Robards, KY	202 GWh	-	Aug 2025	Solar
Crossover Wind	Crossover Wind, LLC	Wynne, AR	45 GWh	-	Aug 2025	Wind
Green River Solar	Green River Solar, LLC	Guston, KY	160 GWh	-	Aug 2025	Solar
Flat Fork Solar	Flat Fork Solar, LLC	Wheatley, AR	54 GWh	-	Aug 2025	Solar
Morris Solar	AES Clean Energy	Kirksville, MO	128 GWh	-	Aug 2025	Solar
Quartz Solar, LLC	Quartz Solar, LLC	Wynne, AR	182 GWh	-	Aug 2025	Solar
Pine River Solar Park	DTE Electric Company	Alma, MI	56 GWh	-	Aug 2025	Solar
Long Lake Solar, LLC	Long Lake Solar, LLC	West Helena, AR	242 GWh	-	Aug 2025	Solar
Darien Solar	Wisconsin Electric Power Co	Darien, WI	229 GWh	-	Aug 2025	Solar
Fairbanks Solar Project	Fairbanks Solar Energy Center LLC	Fairbanks, IN	221 GWh	-	Aug 2025	Solar
Richland Township Solar, LLC	Birch Creek Power, LLC	Washburn, IL	54 GWh	-	Aug 2025	Solar
Polaris Solar Park	DTE Electric Company	Ashley, MI	46 GWh	-	Aug 2025	Solar
Panther Creek Wind Project	Greenbacker Renewable Energy Corporation	Pittsfield, IL	86 GWh	-	Aug 2025	Wind
Gibson Solar	Gibson Solar, LLC	Princeton, IN	36 GWh	-	Aug 2025	Solar
Salt Creek Township Solar, LLC	Birch Creek Power, LLC	Mason City, IL	74 GWh	-	Aug 2025	Solar
Calhoun County Solar Project	AES Clean Energy	Sheridan Township, MI	152 GWh	-	Aug 2025	Solar
Dunns Bridge II Solar	Dunns Bridge II Solar and Storage Generation LLC	San Pierre, IN	580 GWh	-	Aug 2025	Solar
Envoy Solar, LLC	Birch Creek Power, LLC	Mexico, MO	67 GWh	-	Aug 2025	Solar
Prosperity Wind	Prosperity Wind, LLC	Deland, IL	351 GWh	-	Aug 2025	Wind
Whiting	Consolidated Water Power Co	Whiting, WI	25 GWh	Dec 1890	Dec 2024	Water
Biron	Consolidated Water Power Co	Biron, WI	31 GWh	Dec 1895	Dec 2024	Water
Little Quinnesec Falls Hydro Project	Eagle Creek Renewable Energy, LLC	Niagara, WI	57 GWh	Nov 1900	Dec 2024	Water
Apple River	Northern States Power Co - Minnesota	Somerset, WI	13 GWh	Dec 1900	Dec 2024	Water
Edison Sault	Cloverland Electric Co-op	Sault Ste. Marie, MI	199 GWh	Jun 1901	Dec 2024	Water
Wisconsin Rapids	Consolidated Water Power Co	Wisconsin Rapids, WI	50 GWh	Dec 1902	Dec 2024	Water
Norway (MI)	City of Norway	Norway, MI	27 GWh	May 1905	Dec 2024	Water
Little Falls (MN)	ALLETE, Inc.	Little Falls, MN	32 GWh	Dec 1905	Dec 2024	Water
White River (WI)	Northern States Power Co - Minnesota	Ashland, WI	4 GWh	Dec 1906	Dec 2024	Water
Thomson	ALLETE, Inc.	Carlton, MN	290 GWh	Dec 1906	Dec 2024	Water
Croton	Consumers Energy Co - (MI)	Newaygo, MI	29 GWh	Dec 1906	Dec 2024	Water
Webber	Consumers Energy Co - (MI)	Lyons, MI	11 GWh	Dec 1906	Dec 2024	Water
Domtar Paper Company Rothschild	Domtar Paper Company Rothschild	Rothschild, WI	3 GWh	Dec 1909	May 2024	Water
St Croix Falls	Northern States Power Co - Minnesota	St Croix Falls, WI	105 GWh	Dec 1909	Dec 2024	Water
Cedar Falls (WI)	Northern States Power Co - Minnesota	Menomonie, WI	34 GWh	Dec 1909	Dec 2024	Water
High Falls (WI)	Wisconsin Public Service Corp	Town of Stephenson, WI	16 GWh	Jul 1910	Dec 2024	Water
Cooke	Consumers Energy Co - (MI)	Oscoda, MI	25 GWh	Dec 1910	Dec 2024	Water
Georgia-Pacific Corp - Nekoosa Mill	Domtar Industries Inc	Nekoosa, WI	193 GWh	Dec 1911	Aug 2025	Black Liquor : 43.0% Natural Gas : 42.9% Water : 14.1%
Five Channels	Consumers Energy Co - (MI)	Oscoda, MI	23 GWh	Dec 1911	Dec 2024	Water
Port Edwards Mill	Domtar Industries Inc	Port Edwards, WI	39 GWh	Dec 1912	Aug 2025	Water
Sylvan	ALLETE, Inc.	Pillager, MN	11 GWh	Dec 1912	Dec 2024	Water
Saxon Falls	Northern States Power Co - Minnesota	Saxon, WI	8 GWh	Dec 1912	Dec 2024	Water
Loud	Consumers Energy Co - (MI)	Oscoda, MI	17 GWh	Dec 1912	Dec 2024	Water
Keokuk	Union Electric Co - (MO)	Keokuk, IA	888 GWh	Jul 1913	Dec 2024	Water
Big Quinnesec 61	Wisconsin Electric Power Co	Iron Mountain, MI	4 GWh	Apr 1914	Dec 2024	Water
Crystal Falls	City of Crystal Falls	Crystal Falls, MI	5 GWh	May 1914	Dec 2024	Water
Hoot Lake	Otter Tail Power Co	Fergus Falls, MN	3 GWh	Aug 1914	Dec 2024	Water
Prairie Du Sac	Wisconsin Power & Light Co	Prairie du Sac, WI	144 GWh	Sep 1915	Dec 2024	Water
Mio	Consumers Energy Co - (MI)	Mio, MI	14 GWh	Dec 1915	Dec 2024	Water
Mosinee Mill	Ahlstrom-Munksjo NA Specialty Solutions, LLC	Mosinee, WI	118 GWh	Jun 1916	Aug 2025	Black Liquor : 48.6% Bituminous Coal : 23.4% Water : 13.8% Wood/Wood Waste Solids : 6.4% Natural Gas : 3.6% Residual Fuel Oil : 2.3% Sludge Waste : 2.0%
Appleton	Wisconsin Electric Power Co	Appleton, WI	6 GWh	Jul 1916	Dec 2024	Water
Superior Falls	Northern States Power Co - Minnesota	Ironwood, MI	7 GWh	Dec 1916	Dec 2024	Water
Wissota	Northern States Power Co - Minnesota	Chippewa Falls, WI	136 GWh	Dec 1916	Dec 2024	Water
Brainerd Public Utilities	Brainerd Public Utilities	Brainerd, MN	11 GWh	Dec 1916	Dec 2023	Water
Pillager	ALLETE, Inc.	Pillager, MN	7 GWh	Dec 1916	Dec 2024	Water
Merrill	Wisconsin Public Service Corp	Merrill, WI	4 GWh	Feb 1917	Dec 2024	Water
Rhinelander Mill	Ahlstrom-Munksjo	Rhinelander, WI	6 GWh	Nov 1917	Aug 2025	Water
C W Tippy	Consumers Energy Co - (MI)	Wellston, MI	54 GWh	Dec 1917	Dec 2024	Water
Oconto Falls Upper	Eagle Creek Renewable Energy, LLC	Oconto Falls, WI	6 GWh	Dec 1917	Dec 2024	Water
Foote	Consumers Energy Co - (MI)	Oscoda, MI	27 GWh	Dec 1917	Dec 2024	Water
Stevens Point	Consolidated Water Power Co	Stevens Point, WI	29 GWh	Dec 1917	Dec 2024	Water
Grand Rapids	Wisconsin Public Service Corp	Ingalls, MI	32 GWh	May 1918	Dec 2024	Water
James R Smith	City of Marquette - (MI)	Marquette, MI	13 GWh	Dec 1918	Dec 2024	Water
St Louis	City of St Louis - (MI)	St. Louis, MI	29 MWh	Dec 1918	Dec 2024	Water : 75.9% Distillate Fuel Oil : 24.1%
Brule	Wisconsin Electric Power Co	Florence, WI	16 GWh	Dec 1918	Dec 2024	Water
Park Mill	Eagle Creek Renewable Energy, LLC	Marinette, WI	9 GWh	Dec 1919	Dec 2024	Water
Packaging of America Tomahawk Mill	PCA-Tomahawk Mill	Tomahawk, WI	111 GWh	Dec 1919	Dec 2024	Wood/Wood Waste Solids : 35.7% Natural Gas : 34.2% Black Liquor : 18.1% Water : 11.7%
Prairie River	ALLETE, Inc.	Grand Rapids, MN	2 GWh	Mar 1920	Dec 2024	Water
Danbury Dam	Renewable World Energies LLC	Danbury, WI	3 GWh	Dec 1920	Dec 2024	Water
Wausau	Wisconsin Public Service Corp	Wausau, WI	19 GWh	Feb 1921	Dec 2024	Water
Potato Rapids	Wisconsin Public Service Corp	Town of Porterfield, WI	4 GWh	Apr 1921	Dec 2024	Water
Rogers	Consumers Energy Co - (MI)	Big Rapids, MI	16 GWh	Dec 1921	Dec 2024	Water
Big Falls	Northern States Power Co - Minnesota	Glen Fora, WI	36 GWh	Dec 1921	Dec 2024	Water
Knife Falls	ALLETE, Inc.	Cloquet, MN	10 GWh	Dec 1921	Dec 2024	Water
Pine	Wisconsin Electric Power Co	Florence, WI	10 GWh	May 1922	Dec 2024	Water
Flambeau Lower Project	Renewable World Energies LLC	Park Falls, WI	3 GWh	Dec 1922	Dec 2024	Water
Dells	Northern States Power Co - Minnesota	Eau Claire, WI	42 GWh	Dec 1922	Dec 2024	Water
Scanlon	ALLETE, Inc.	Scanlon, MN	7 GWh	Dec 1922	Dec 2024	Water
Lanesboro	Lanesboro Public Utility Comm	Lanesboro, MN	184 MWh	Dec 1922	Dec 2024	Water : 81.0% Distillate Fuel Oil : 19.0%
Hat Rapids	Wisconsin Public Service Corp	Rhinelander, WI	6 GWh	May 1923	Dec 2024	Water
Norway (IN)	Northern Indiana Pub Serv Co	Monticello, IN	16 GWh	May 1923	Dec 2024	Water
Johnson Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	10 GWh	Jun 1923	Dec 2024	Water
Winton	ALLETE, Inc.	Winton, MN	10 GWh	Jul 1923	Dec 2024	Water
Barron	City of Barron - (WI)	Barron, WI	342 MWh	Jul 1923	Dec 2024	Water
Menominee Mill Marinette	Eagle Creek Renewable Energy, LLC	Menominee, MI	12 GWh	Dec 1923	Aug 2025	Water
Fond Du Lac	ALLETE, Inc.	Duluth, MN	54 GWh	Dec 1923	Dec 2024	Water
Iowa Hydro LLC	Renewable World Energies LLC	Maquoketa, IA	6 GWh	Dec 1923	Aug 2025	Water
Alcona	Consumers Energy Co - (MI)	Glennie, MI	26 GWh	Dec 1923	Dec 2024	Water
International Falls Power	Boise White Paper LLC	International Falls, MN	48 GWh	Dec 1923	Aug 2025	Water
Kingsford	Wisconsin Electric Power Co	Kingsford, MI	25 GWh	Apr 1924	Dec 2024	Water
Twin Cities Hydro LLC	Twin Cities Hydro LLC	St. Paul, MN	90 GWh	Sep 1924	Dec 2024	Water
Caldron Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	14 GWh	Oct 1924	Dec 2024	Water
Sandstone Rapids	Wisconsin Public Service Corp	Town of Stephenson, WI	9 GWh	Dec 1924	Dec 2024	Water
Dayton Hydro	Eagle Creek Renewable Energy, LLC	Ottawa, IL	16 GWh	Dec 1924	Dec 2024	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	699.8 GWh	4
#27	Associated Electric Cooperative, Inc.	23.5 TWh	47
#13	Duke Energy Carolinas	112.7 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	870.3 TWh	2,465
#6	Southern Company Services, Inc. - Trans	250.6 TWh	417
#5	Southwest Power Pool	299.8 TWh	835
#49	Southwestern Power Administration	5.3 TWh	34
#9	Tennessee Valley Authority	161.5 TWh	204

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	870.3 TWh	2,465
#2	Midcontinent Independent System Operator, Inc.	655.2 TWh	2,831
#4	Electric Reliability Council of Texas, Inc.	484.6 TWh	1,313
#5	Southwest Power Pool	299.8 TWh	835
#6	Southern Company Services, Inc. - Trans	250.6 TWh	417
#7	California Independent System Operator	188.1 TWh	2,075
#9	Tennessee Valley Authority	161.5 TWh	204
#10	Florida Power & Light Co.	148.6 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.7 TWh	565