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	Jan 2026
Annual Generation	656.9 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 \| 35.4% Coal \| 28.9% Wind \| 15.1% Nuclear \| 14% Solar \| 4.6% 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
Green River Solar	Green River Solar, LLC	Guston, KY	235 GWh	-	Oct 2025	Solar
Posey Solar	Southern Indiana Gas & Elec Co	Mount Vernon, IN	238 GWh	-	Oct 2025	Solar
Crossover Wind	Crossover Wind, LLC	Wynne, AR	91 GWh	-	Oct 2025	Wind
Winfield Solar	Winfield Solar I, LLC	Winfield, MO	160 GWh	-	Oct 2025	Solar
Speedway Solar, LLC	Speedway Solar, LLC	Morrison Town, IN	182 GWh	-	Oct 2025	Solar
Heirloom Solar	Heirloom Solar (Ratts 1 Phase 2 Solar, LLC)	Petersburg, IN	8 GWh	-	Oct 2025	Solar
Amite Solar, LLC	Amite Solar, LLC	Roseland, LA	153 GWh	-	Oct 2025	Solar
Pine River Solar Park	DTE Electric Company	Alma, MI	67 GWh	-	Oct 2025	Solar
Unbridled Solar	National Grid Renewables	Robards, KY	256 GWh	-	Oct 2025	Solar
Fairbanks Solar Project	Fairbanks Solar Energy Center LLC	Fairbanks, IN	314 GWh	-	Oct 2025	Solar
Dunns Bridge II Solar	Dunns Bridge II Solar and Storage Generation LLC	San Pierre, IN	738 GWh	-	Oct 2025	Solar
Morris Solar	AES Clean Energy	Kirksville, MO	202 GWh	-	Oct 2025	Solar
Flat Fork Solar	Flat Fork Solar, LLC	Wheatley, AR	102 GWh	-	Oct 2025	Solar
Sauk Solar Park	DTE Electric Company	Union City, MI	188 GWh	-	Oct 2025	Solar
Quartz Solar, LLC	Quartz Solar, LLC	Wynne, AR	232 GWh	-	Oct 2025	Solar
RATTS 1	Ratts 1 Solar LLC	Petersburg, IN	24 GWh	-	Oct 2025	Solar
Long Lake Solar, LLC	Long Lake Solar, LLC	West Helena, AR	324 GWh	-	Oct 2025	Solar
Darien Solar	Wisconsin Electric Power Co	Darien, WI	292 GWh	-	Oct 2025	Solar
Gibson Solar	Gibson Solar, LLC	Princeton, IN	109 GWh	-	Oct 2025	Solar
Coldwater River Solar	Coldwater River Solar, LLC	Coldwater, MI	32 GWh	-	Oct 2025	Solar
Richland Township Solar, LLC	Birch Creek Power, LLC	Washburn, IL	68 GWh	-	Oct 2025	Solar
Sebree Solar, LLC - Hybrid	Sebree Solar, LLC	Robards, KY	83 GWh	-	Oct 2025	Solar
Panther Creek Wind Project	Greenbacker Renewable Energy Corporation	Pittsfield, IL	100 GWh	-	Oct 2025	Wind
Prosperity Wind	Prosperity Wind, LLC	Deland, IL	472 GWh	-	Oct 2025	Wind
Appleseed Solar	Appleseed Solar, LLC	Logansport, IN	75 GWh	-	Oct 2025	Solar
Salt Creek Township Solar, LLC	Birch Creek Power, LLC	Mason City, IL	95 GWh	-	Oct 2025	Solar
Calhoun County Solar Project	AES Clean Energy	Sheridan Township, MI	198 GWh	-	Oct 2025	Solar
Sherco Solar II	Northern States Power Co - Minnesota	Becker, MN	49 GWh	-	Oct 2025	Solar
Polaris Solar Park	DTE Electric Company	Ashley, MI	46 GWh	-	Oct 2025	Solar
Envoy Solar, LLC	Birch Creek Power, LLC	Mexico, MO	86 GWh	-	Oct 2025	Solar
Eldorado Solar I	Sol Systems	Eldorado, IL	282 GWh	-	Oct 2025	Solar
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	184 GWh	Dec 1911	Oct 2025	Black Liquor : 43.1% Natural Gas : 42.3% Water : 14.6%
Five Channels	Consumers Energy Co - (MI)	Oscoda, MI	23 GWh	Dec 1911	Dec 2024	Water
Port Edwards Mill	Domtar Industries Inc	Port Edwards, WI	40 GWh	Dec 1912	Oct 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	111 GWh	Jun 1916	Oct 2025	Black Liquor : 51.8% Bituminous Coal : 19.6% Water : 14.7% Wood/Wood Waste Solids : 6.2% Natural Gas : 4.1% Residual Fuel Oil : 1.8% Sludge Waste : 1.8%
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	Oct 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	Oct 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	Oct 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	49 GWh	Dec 1923	Oct 2025	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#60	Alcoa Power Generating, Inc. - Yadkin Division	643.5 GWh	4
#27	Associated Electric Cooperative, Inc.	23.9 TWh	47
#13	Duke Energy Carolinas	111.6 TWh	565
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#1	PJM Interconnection, LLC	872.9 TWh	2,465
#6	Southern Company Services, Inc. - Trans	249.9 TWh	417
#5	Southwest Power Pool	300.6 TWh	835
#51	Southwestern Power Administration	5.0 TWh	34
#9	Tennessee Valley Authority	161.0 TWh	204

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	872.9 TWh	2,465
#2	Midcontinent Independent System Operator, Inc.	656.9 TWh	2,831
#3	Electric Reliability Council of Texas, Inc.	484.7 TWh	1,313
#5	Southwest Power Pool	300.6 TWh	835
#6	Southern Company Services, Inc. - Trans	249.9 TWh	417
#7	California Independent System Operator	184.8 TWh	2,075
#9	Tennessee Valley Authority	161.0 TWh	204
#10	Florida Power & Light Co.	149.6 TWh	187
#12	New York Independent System Operator	132.6 TWh	1,211
#13	Duke Energy Carolinas	111.6 TWh	565