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	Oct 2026
Annual Generation	677.7 TWh
Power Plants	3,095
Utilities	1,372
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 \| 37.1% Coal \| 26.2% Wind \| 15% Nuclear \| 13.8% Solar \| 6.1% Water \| 1.4% Other Fuel \| 0.5%

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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Harley-Davison Powertrain Operations	Wisconsin Electric Power Co	Menomonee Falls, WI	3 GWh	Sep 2020	Dec 2025	Solar
City of Milwaukee Landfill	Wisconsin Electric Power Co	Milwaukee, WI	3 GWh	Jan 2021	Dec 2025	Solar
ATI	Wisconsin Electric Power Co	Cudahy, WI	3 GWh	Oct 2020	Dec 2025	Solar
CREE	Wisconsin Electric Power Co	Racine, WI	2 GWh	Jul 2021	Dec 2025	Solar
Jones Dairy	Wisconsin Electric Power Co	Fort Atkinson, WI	4 GWh	Jun 2021	Dec 2025	Solar
Regal Ware	Wisconsin Electric Power Co	West Bend, WI	3 GWh	Mar 2021	May 2025	Solar
Washington County	Wisconsin Electric Power Co	West Bend, WI	4 GWh	Dec 2019	Dec 2025	Solar
UW Parkside	Wisconsin Electric Power Co	Kenosha, WI	4 GWh	Oct 2020	Dec 2025	Solar
Lannon Stone	Wisconsin Electric Power Co	Pewaukee, WI	4 GWh	Nov 2021	Dec 2025	Solar
Paris Solar	Wisconsin Electric Power Co	Union Grove, WI	294 GWh	Nov 2024	Jul 2026	Solar
Silver Lake Solar WI, LLC	Wisconsin Electric Power Co	Salem, WI	9 GWh	Nov 2023	Dec 2025	Solar
Auburn Solar WI, LLC	Wisconsin Electric Power Co	Campbellsport, WI	9 GWh	Nov 2024	Dec 2025	Solar
Bonduel Solar WI, LLC	Wisconsin Electric Power Co	Bonduel, WI	12 GWh	Nov 2023	Dec 2025	Solar
Caledonia Solar WI, LLC	Wisconsin Electric Power Co	Caledonia, WI	9 GWh	Mar 2025	Dec 2025	Solar
Spring Brook Solar WI, LLC	Wisconsin Electric Power Co	Whitewater, WI	630 MWh	Sep 2025	Dec 2025	Solar
Hackbarth Solar WI, LLC	Wisconsin Electric Power Co	Fort Atkinson, WI	9 GWh	Nov 2024	Dec 2025	Solar
Adams Road Solar	Wisconsin Electric Power Co	Franksville, WI	6 MWh	Nov 2025	Dec 2025	Solar
Jackson Solar WI, LLC	Wisconsin Electric Power Co	Cedarburg, WI	12 GWh	Nov 2023	Dec 2025	Solar
LaFayette Solar WI, LLC	Wisconsin Electric Power Co	Elkhorn, WI	10 GWh	Nov 2024	Dec 2025	Solar
Raymond Solar WI, LLC	Wisconsin Electric Power Co	Franksville, WI	8 GWh	Jan 2025	Dec 2025	Solar
Spring Prairie Solar WI, LLC	Wisconsin Electric Power Co	Burlington, WI	13 GWh	Nov 2023	Dec 2025	Solar
Twin Falls (WI)	Wisconsin Electric Power Co	Florence, WI	37 GWh	Jun 2016	Dec 2025	Water
Badger Hollow II	Wisconsin Electric Power Co	Cobb, WI	214 GWh	Nov 2023	Jul 2026	Solar
Darien Solar	Wisconsin Electric Power Co	Darien, WI	365 GWh	Feb 2025	Jul 2026	Solar
Rothschild Biomass Cogen Facility	Wisconsin Electric Power Co	Rothschild, WI	166 GWh	Oct 2013	Dec 2025	Wood/Wood Waste Solids : 94.7% Natural Gas : 5.3%
Big Quinnesec 92	Wisconsin Electric Power Co	Iron Mountain, MI	100 GWh	Oct 1949	Dec 2025	Water
Paris (WI)	Wisconsin Electric Power Co	Union Grove, WI	215 GWh	Feb 1995	Dec 2025	Natural Gas
Big Quinnesec 61	Wisconsin Electric Power Co	Iron Mountain, MI	2 GWh	Apr 1914	Dec 2025	Water
Glacier Hills	Wisconsin Electric Power Co	Cambria, WI	331 GWh	Nov 2011	Jul 2026	Wind
Way Dam	Wisconsin Electric Power Co	Crystal Falls, MI	6 GWh	Nov 1949	Dec 2025	Water
Germantown	Wisconsin Electric Power Co	Germantown, WI	33 GWh	Jun 1978	Dec 2025	Natural Gas : 83.1% Distillate Fuel Oil : 16.9%
Blue Sky Green Field Wind Project	Wisconsin Electric Power Co	Fond du Lac, WI	317 GWh	Apr 2008	Jul 2026	Wind
Concord	Wisconsin Electric Power Co	Watertown, WI	203 GWh	Jun 1993	Dec 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Appleton	Wisconsin Electric Power Co	Appleton, WI	12 GWh	Jul 1916	Dec 2025	Water
Valley (WI)	Wisconsin Electric Power Co	Milwaukee, WI	327 GWh	May 1968	Jul 2026	Natural Gas
South Oak Creek	Wisconsin Electric Power Co	Oak Creek, WI	2 TWh	Nov 1959	Jul 2026	Subbituminous Coal : 99.5%
Port Washington Generating Station	Wisconsin Electric Power Co	Port Washington, WI	7 TWh	Jun 2005	Jul 2026	Natural Gas
Montfort Wind Energy Center	Wisconsin Electric Power Co	Montfort, WI	50 GWh	May 2002	Jul 2026	Wind
Elm Road Generating Station	Wisconsin Electric Power Co	Oak Creek, WI	8 TWh	Jan 2010	Jul 2026	Subbituminous Coal : 88.7% Bituminous Coal : 7.8% Natural Gas : 3.5%
Pine	Wisconsin Electric Power Co	Florence, WI	11 GWh	May 1922	Dec 2025	Water
White Rapids	Wisconsin Electric Power Co	Stephenson, MI	33 GWh	Sep 1927	Dec 2025	Water
Peavy Falls	Wisconsin Electric Power Co	Crystal Falls, MI	48 GWh	Dec 1942	Dec 2025	Water
Michigamme Falls	Wisconsin Electric Power Co	Crystal Falls, MI	29 GWh	May 1953	Dec 2025	Water
Kingsford	Wisconsin Electric Power Co	Kingsford, MI	26 GWh	Apr 1924	Dec 2025	Water
Hemlock Falls	Wisconsin Electric Power Co	Crystal Falls, MI	9 GWh	Jul 1953	Oct 2025	Water
Chalk Hill	Wisconsin Electric Power Co	Stephenson, MI	34 GWh	Apr 1927	Dec 2025	Water
Brule	Wisconsin Electric Power Co	Florence, WI	12 GWh	Dec 1918	Dec 2025	Water
Whitewater Generating Station	Wisconsin Electric Power Co	Whitewater, WI	230 GWh	Aug 1997	Jul 2026	Natural Gas : 99.0% Distillate Fuel Oil : 1.0%
Wiota	Wiota Wind Energy, LLC #1	Wiota, IA	5 GWh	Apr 2012	Dec 2025	Wind
Winona Solar	Winona Solar I LLC	Altura, MN	4 GWh	Jul 2019	Dec 2025	Solar
Winona Garden	Winona Garden LLC	Altura, MN	2 GWh	Oct 2023	Dec 2025	Solar
Winnebago County Landfill Gas	Winnebago County - (WI)	Oshkosh, WI	3 GWh	Jan 2000	Dec 2025	Landfill Gas
Winfield Solar	Winfield Solar I, LLC	Winfield, MO	289 GWh	Apr 2025	Jul 2026	Solar
Windcurrent Farms LLC	Windcurrent Farms LLC	Woodstock, MN	5 GWh	Aug 2003	Dec 2025	Wind
Wind GEM	Wind GEM, LLC	Stuart, IA	5 GWh	Aug 2015	Dec 2025	Wind
Wilton Wind II LLC	Wilton Wind II LLC	Wilton, ND	201 GWh	Oct 2009	Dec 2025	Wind
Willmar Municipal East Substation	Willmar Municipal Utilities (MN)	Willmar, MN	32 MWh	May 2000	Dec 2025	Distillate Fuel Oil
Willmar Municipal SW Substation	Willmar Municipal Utilities (MN)	Willmar, MN	30 MWh	May 2000	Dec 2025	Distillate Fuel Oil
Willford Solar, LLC	Willford Solar, LLC	Gladwin, MI	41 GWh	Sep 2023	Dec 2025	Solar
Wildwood Solar Plant	Wildwood Solar, LLC	Tutwiler, MS	164 GWh	Nov 2025	Jul 2026	Solar
Whiteside Solar 1 CSG	Whiteside Solar 1, LLC	Fulton, IL	4 GWh	Nov 2020	Dec 2025	Solar
White Tail Solar	White Tail Solar, LLC	Milan, MI	163 GWh	Oct 2025	Jul 2026	Solar
White Oak Energy LLC	White Oak Energy LLC	Carlock, IL	400 GWh	May 2011	Dec 2025	Wind
Westside Solar	Westside Solar, LLC (Ecofin)	Rochester, MN	19 GWh	Nov 2022	Dec 2025	Solar
WestRock (TX)	WestRock (TX)	Evadale, TX	441 GWh	May 1954	Dec 2025	Black Liquor : 65.1% Natural Gas : 20.7% Wood/Wood Waste Solids : 14.2%
Westrock Hodge (LA)	Westrock (LA)	Hodge, LA	489 GWh	Nov 1952	Dec 2025	Black Liquor : 51.3% Natural Gas : 35.6% Wood/Wood Waste Solids : 13.1%
Westridge Windfarm LLC	Westridge Windfarm LLC	Woodstock, MN	288 MWh	Oct 2003	Dec 2024	Wind
Westlake Plaquemine	Westlake Chemicals & Vinyls LLC	Plaquemine, LA	1 TWh	Apr 1997	Jul 2026	Natural Gas : 99.3% Other Gas : 0.7%
PPG Powerhouse C	Westlake 2 US LLC	Lake Charles, LA	1 TWh	Jul 1977	Jul 2026	Natural Gas : 99.9%
PPG Plant C Caustic	Westlake 2 US LLC	Lake Charles, LA	14 GWh	Sep 1986	Dec 2025	Natural Gas
PPG Riverside	Westlake 2 US LLC	Lake Charles, LA	127 GWh	Aug 1947	Jul 2026	Purchased Steam
RS Cogen	Westlake 2 US LLC	Lake Charles, LA	3 TWh	Nov 2002	Jul 2026	Natural Gas
Pierre Solar	Western Minnesota Mun Pwr Agny	Pierre, SD	2 GWh	Aug 2016	Dec 2025	Solar
Red Rock Hydro Plant	Western Minnesota Mun Pwr Agny	Pella, IA	202 GWh	Apr 2021	Jul 2026	Water
Marshall Solar Plus LLC	Western Minnesota Mun Pwr Agny	Marshall, MN	17 GWh	Nov 2024	Dec 2025	Solar
Western Michigan University Power Plant	Western Michigan University	Kalamazoo, MI	81 GWh	Jul 1997	Dec 2025	Natural Gas
Webster Holdco Solar CSG	Webster Holdco LLC	Webster, MN	8 GWh	Jun 2017	Dec 2025	Solar
Waverly Municipal Electric North Plant	Waverly Municipal Elec Utility - (IA)	Waverly, IA	212 MWh	Jul 1958	Dec 2025	Distillate Fuel Oil : 67.7% Natural Gas : 32.3%
South Plant (IA)	Waverly Municipal Elec Utility - (IA)	Waverly, IA	71 MWh	Apr 2000	Dec 2025	Distillate Fuel Oil
Waverly Community Wind Project	Waverly Municipal Elec Utility - (IA)	Waverly, IA	4 GWh	Nov 2001	Dec 2025	Wind
Waterford Holdco CSG	Waterford Holdco LLC	Waterford, MN	4 GWh	Oct 2017	Dec 2025	Solar
Washington Island	Washington Island El Coop, Inc	Washington Island, WI	5 MWh	Nov 1945	Dec 2025	Distillate Fuel Oil
Wapello Solar LLC	Wapello Solar LLC	Wapello, IA	203 GWh	Feb 2021	Jul 2026	Solar
Walleye Wind	Walleye Wind, LLC	Beaver Creek, MN	457 GWh	Nov 2022	Jul 2026	Wind
Wabasha Solar	Wabasha Solar LLC	Wabasha, MN	3 GWh	Jul 2019	Dec 2025	Solar
Wabasha Holdco Solar CSG	Wabasha Holdco LLC	Wabasha, MN	3 GWh	Feb 2017	Dec 2025	Solar
Clinton LFGTE	Wabash Valley Power Assn, Inc	Clinton, IL	16 GWh	Jan 2006	Jul 2026	Landfill Gas
Wabash Valley Power IGCC	Wabash Valley Power Assn, Inc	Terre Haute, IN	477 GWh	Nov 1953	Jul 2026	Natural Gas
Oak Ridge LFGTE	Wabash Valley Power Assn, Inc	Logansport, IN	23 GWh	Nov 2003	Dec 2025	Landfill Gas
Liberty I & II LFGTE	Wabash Valley Power Assn, Inc	Monticello, IN	10 MWh	Jul 2005	Dec 2025	Landfill Gas
Deercroft I & II LFGTE	Wabash Valley Power Assn, Inc	Michigan City, IN	19 GWh	Jul 1999	Dec 2025	Landfill Gas
Coffeen Solar BESS	Vistra Corp	Coffeen, IL	95 GWh	Nov 2024	Jul 2026	Solar
Baldwin Solar BESS	Vistra Corp	Baldwin, IL	148 GWh	Nov 2024	Jul 2026	Solar
Newton Solar BESS LLC	Vistra Corp	Newton, IL	58 GWh	-	Jul 2026	Solar
Viresco Turtle Lake	Viresco Turtle Lake	Turtle Lake, WI	8 GWh	Aug 2013	Dec 2025	Other Biomass Gas
Viola	Village of Viola - (WI)	Viola, WI	15 MWh	Dec 2001	Dec 2025	Distillate Fuel Oil
Pine Street	Village of Sebewaing - (MI)	Sebewaing, MI	462 MWh	May 1969	Dec 2025	Natural Gas
Rantoul	Village of Rantoul - (IL)	Rantoul, IL	313 MWh	Dec 1950	Jul 2026	Distillate Fuel Oil
Freeburg	Village of Freeburg - (IL)	Freeburg, IL	145 MWh	Jul 1948	Dec 2025	Distillate Fuel Oil
Cashton	Village of Cashton - (WI)	Cashton, WI	10 MWh	Jul 1932	Dec 2025	Distillate Fuel Oil : 98.3% Natural Gas : 1.7%

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#26	Associated Electric Cooperative, Inc.	22.9 TWh	47
#13	Duke Energy Carolinas	113.4 TWh	578
#50	Duke Energy Progress West	4.6 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#6	Southern Company Services, Inc. - Trans	259.3 TWh	423
#5	Southwest Power Pool	314.5 TWh	876
#53	Southwestern Power Administration	3.5 TWh	37
#9	Tennessee Valley Authority	166.2 TWh	209

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#2	Midcontinent Independent System Operator, Inc.	677.7 TWh	3,095
#3	Electric Reliability Council of Texas, Inc.	506.3 TWh	1,487
#5	Southwest Power Pool	314.5 TWh	876
#6	Southern Company Services, Inc. - Trans	259.3 TWh	423
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578