Midcontinent Independent System Operator, Inc.

Balancing Authority Summary Information

Midcontinent Independent System Operator, Inc. is ranked #2 out of 64 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	Jul 2026
Annual Generation	669.4 TWh
Power Plants	3,038
Utilities	1,345
Ranked #2 out of 64 in terms of net annual generation
Ranked #2 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 37% Coal \| 26.5% Wind \| 14.9% Nuclear \| 13.9% Solar \| 5.7% Water \| 1.4% Other Fuel \| 0.6%

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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Albany Solar (WI)	Wisconsin Power & Light Co	Broadhead, WI	99 GWh	Nov 2023	May 2026	Solar
Hodag Solar	Wisconsin Public Service Corp	Rhinelander, WI	13 GWh	Dec 2021	Dec 2025	Solar
Red Barn Energy	Wisconsin Public Service Corp	Montfort, WI	257 GWh	Mar 2023	May 2026	Wind
Antigo-Forrest Street Solar Project	Wisconsin Public Service Corp	Antigo, WI	9 GWh	Oct 2024	Dec 2025	Solar
Weston RICE	Wisconsin Public Service Corp	Kronenwetter, WI	144 GWh	Jun 2023	Dec 2025	Natural Gas
Grand Rapids	Wisconsin Public Service Corp	Ingalls, MI	35 GWh	May 1918	Dec 2025	Water
Weston	Wisconsin Public Service Corp	Rothschild, WI	4 TWh	Nov 1954	May 2026	Subbituminous Coal : 99.3% Natural Gas : 0.7%
Wausau	Wisconsin Public Service Corp	Wausau, WI	24 GWh	Feb 1921	Dec 2025	Water
West Marinette	Wisconsin Public Service Corp	Peshtigo, WI	90 GWh	May 1971	Dec 2025	Natural Gas
Tomahawk	Wisconsin Public Service Corp	Tomahawk, WI	11 GWh	Dec 1937	Dec 2025	Water
Sandstone Rapids	Wisconsin Public Service Corp	Town of Stephenson, WI	10 GWh	Dec 1924	Dec 2025	Water
Potato Rapids	Wisconsin Public Service Corp	Town of Porterfield, WI	4 GWh	Apr 1921	Dec 2025	Water
De Pere Energy Center	Wisconsin Public Service Corp	De Pere, WI	180 GWh	May 1999	Dec 2025	Natural Gas : 59.9% Distillate Fuel Oil : 40.1%
Pulliam	Wisconsin Public Service Corp	Green Bay, WI	103 GWh	Aug 1949	May 2026	Natural Gas
Merrill	Wisconsin Public Service Corp	Merrill, WI	4 GWh	Feb 1917	Dec 2025	Water
Alexander	Wisconsin Public Service Corp	Merrill, WI	14 GWh	Dec 1924	Dec 2025	Water
Crane Creek Wind Energy Center	Wisconsin Public Service Corp	Riceville, IA	284 GWh	Nov 2009	Dec 2025	Wind
Fox Energy Center	Wisconsin Public Service Corp	Wrightstown, WI	4 TWh	May 2005	May 2026	Natural Gas
Johnson Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	11 GWh	Jun 1923	Dec 2025	Water
Forward Wind Energy Center	Wisconsin Public Service Corp	Brownsville, WI	125 GWh	Jun 2008	May 2026	Wind
High Falls (WI)	Wisconsin Public Service Corp	Town of Stephenson, WI	16 GWh	Jul 1910	Dec 2025	Water
Hat Rapids	Wisconsin Public Service Corp	Rhinelander, WI	7 GWh	May 1923	Dec 2025	Water
Grandfather Falls	Wisconsin Public Service Corp	Irma, WI	79 GWh	Nov 1938	Dec 2025	Water
Caldron Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	11 GWh	Oct 1924	Dec 2025	Water
Two Creeks Solar	Wisconsin Public Service Corp	Two Rivers, WI	185 GWh	Oct 2020	May 2026	Solar
Badger Hollow I	Wisconsin Public Service Corp	Montfort, WI	201 GWh	Oct 2021	May 2026	Solar
Castle Rock	Wisconsin River Power Company	Adams, WI	83 GWh	Jul 1950	Dec 2025	Water
Petenwell	Wisconsin River Power Company	Necedah, WI	97 GWh	Jul 1949	Dec 2025	Water
Tazewell Gas Recovery	WM Illinois Renewable Energy LLC	East Peoria, IL	11 GWh	Jun 1989	Dec 2025	Landfill Gas
Milam Gas Recovery	WM Illinois Renewable Energy LLC	East St. Lois, IL	19 GWh	Mar 1991	Dec 2025	Natural Gas
Timberline Trail Gas Recovery	WM Renewable Energy LLC	Weyerhaeser, WI	19 GWh	Jan 2006	Dec 2025	Landfill Gas
Eagle Valley (MI)	WM Renewable Energy LLC	Orion, MI	23 GWh	Jun 2011	Dec 2025	Landfill Gas
Deertrack Park Gas Recovery	WM Renewable Energy LLC	Watertown, WI	33 GWh	Jan 2006	Dec 2025	Landfill Gas
Berlin Landfill Gas	WM Renewable Energy LLC	Berlin, WI	12 GWh	Jul 2001	Dec 2025	Landfill Gas
Lake Mills Gas Recovery	WM Renewable Energy LLC	Lake Mills, IA	32 GWh	Feb 2006	Dec 2025	Landfill Gas
Ridgeview	WM Renewable Energy LLC	Whitelaw, WI	37 GWh	Aug 2002	Dec 2025	Landfill Gas
Two Pine Landfill Gas Recovery	WM Renewable Energy LLC	North Little Rock, AR	30 GWh	Sep 2006	Dec 2025	Landfill Gas
Waste Management Eco Vista LFGTE	WM Renewable Energy LLC	Springdale, AR	22 GWh	Oct 2010	Dec 2024	Natural Gas
Omega Hills Gas Recovery	WM Renewable Energy LLC	Germantown, WI	78 GWh	Nov 1985	May 2026	Landfill Gas
Five Oaks Gas Recovery	WM Renewable Energy LLC	Taylorville, IL	24 GWh	Jan 2008	Dec 2025	Landfill Gas
Waste Management Northern Oaks LFGTE	WM Renewable Energy LLC	Harrison, MI	9 GWh	Oct 2010	Dec 2025	Landfill Gas
Spruce Ridge Gas Recovery	WM Renewable Energy LLC	Glencoe, MN	25 GWh	Mar 2008	Dec 2025	Landfill Gas
Metro Methane Recovery Facility	WM Renewable Energy LLC	Mitchellville, IA	85 GWh	Dec 1997	May 2026	Landfill Gas
Pheasant Run Landfill Gas Recovery	WM Renewable Energy LLC	Bristol, WI	47 GWh	Jan 1992	Dec 2025	Landfill Gas
Venice Resources Gas Recovery	WM Renewable Energy LLC	Lennon, MI	13 GWh	Feb 1992	Dec 2025	Landfill Gas
Metro Gas Recovery	WM Renewable Energy LLC	Franklin, WI	41 GWh	Nov 1985	Dec 2025	Landfill Gas
Pine Tree Acres WM LFGTE	WM Renewable Energy LLC	Lenox, MI	89 GWh	Feb 2012	May 2026	Landfill Gas
Wolf Run Solar	Wolf Run Solar LLC	Chapin, IL	305 GWh	Oct 2024	May 2026	Solar
Alpine Power Plant	Wolverine Power Supply Coop	Elmira, MI	776 GWh	May 2016	Dec 2025	Natural Gas
Claude Vandyke	Wolverine Power Supply Coop	Dorr, MI	8 GWh	Dec 1966	Dec 2025	Natural Gas
Vestaburg	Wolverine Power Supply Coop	Vestaburg, MI	4 GWh	Dec 1958	Dec 2025	Natural Gas
Sumpter	Wolverine Power Supply Coop	Belleville, MI	291 GWh	Jun 2002	Dec 2025	Natural Gas
Gaylord - Wolverine	Wolverine Power Supply Coop	Gaylord, MI	37 GWh	May 2001	Dec 2025	Natural Gas
George Johnson	Wolverine Power Supply Coop	Hersey, MI	43 GWh	Aug 1993	Dec 2025	Natural Gas
Tower	Wolverine Power Supply Coop	Tower, MI	61 MWh	Feb 1971	Dec 2025	Distillate Fuel Oil
Wolverine Solar	Wolverine Solar, LLC	Maynard, MN	2 GWh	Oct 2023	Dec 2025	Solar
Wolverine	Wolverine Wind Energy, LLC	Greenfield, IA	5 GWh	Sep 2010	Dec 2025	Wind
Workman Road Solar Farm, LLC	Workman Road Solar Farm, LLC	Lake City, MI	4 GWh	Nov 2020	Dec 2025	Solar
Island Street Peaking Plant	WPPI Energy	Kaukauna, WI	20 GWh	May 2004	Dec 2025	Natural Gas
Wyandotte	Wyandotte Municipal Serv Comm - (MI)	Wyandotte, MI	110 MWh	Dec 1947	May 2026	Distillate Fuel Oil
Clam River Dam	Zero6 Energy Hydro	Danbury, WI	5 GWh	Mar 1942	Dec 2025	Water
Arpin Dam	Zero6 Energy Hydro	Radisson, WI	6 GWh	Aug 1971	Aug 2025	Water
Flambeau Crowley Rapids Project	Zero6 Energy Hydro	Park Falls, WI	4 GWh	Dec 1929	Dec 2025	Water
Flambeau Lower Project	Zero6 Energy Hydro	Park Falls, WI	3 GWh	Dec 1922	Dec 2025	Water
Danbury Dam	Zero6 Energy Hydro	Danbury, WI	2 GWh	Dec 1920	Dec 2025	Water
Iowa Hydro LLC	Zero6 Energy Hydro	Maquoketa, IA	6 GWh	Dec 1923	May 2026	Water
LAC Courte Oreilles Hydroelect	Zero6 Energy Hydro	Winter, WI	7 GWh	Nov 1986	Dec 2025	Water
Zumbro Solar Garden	Zumbro Garden LLC	Kasson, MN	2 GWh	Mar 2020	Dec 2025	Solar
Zumbro Community Solar Garden	Zumbro Solar LLC	Zumbrota, MN	2 GWh	Mar 2018	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	442.5 GWh	4
#26	Associated Electric Cooperative, Inc.	23.4 TWh	47
#13	Duke Energy Carolinas	112.6 TWh	577
#50	Duke Energy Progress West	4.5 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#6	Southern Company Services, Inc. - Trans	253.5 TWh	422
#5	Southwest Power Pool	306.8 TWh	856
#53	Southwestern Power Administration	4.1 TWh	34
#9	Tennessee Valley Authority	163.4 TWh	207

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#2	Midcontinent Independent System Operator, Inc.	669.4 TWh	3,038
#3	Electric Reliability Council of Texas, Inc.	494.1 TWh	1,471
#5	Southwest Power Pool	306.8 TWh	856
#6	Southern Company Services, Inc. - Trans	253.5 TWh	422
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577