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
Washington County	Wisconsin Electric Power Co	West Bend, WI	4 GWh	Dec 2019	Dec 2024	Solar
UW Parkside	Wisconsin Electric Power Co	Kenosha, WI	4 GWh	Oct 2020	Dec 2024	Solar
Lannon Stone	Wisconsin Electric Power Co	Pewaukee, WI	4 GWh	Nov 2021	Dec 2024	Solar
Spring Prairie Solar WI, LLC	Wisconsin Electric Power Co	Burlington, WI	4 GWh	Nov 2023	May 2024	Solar
Silver Lake Solar WI, LLC	Wisconsin Electric Power Co	Salem, WI	2 GWh	Nov 2023	May 2024	Solar
LaFayette Solar WI, LLC	Wisconsin Electric Power Co	Elkhorn, WI	15 MWh	Nov 2024	Dec 2024	Solar
Jackson Solar WI, LLC	Wisconsin Electric Power Co	Cedarburg, WI	4 GWh	Nov 2023	May 2024	Solar
Bonduel Solar WI, LLC	Wisconsin Electric Power Co	Bonduel, WI	1 GWh	Nov 2023	Feb 2024	Solar
Auburn Solar WI, LLC	Wisconsin Electric Power Co	Campbellsport, WI	80 MWh	Nov 2024	Dec 2024	Solar
Valley (WI)	Wisconsin Electric Power Co	Milwaukee, WI	353 GWh	May 1968	Sep 2025	Natural Gas
Pine	Wisconsin Electric Power Co	Florence, WI	10 GWh	May 1922	Dec 2024	Water
Appleton	Wisconsin Electric Power Co	Appleton, WI	6 GWh	Jul 1916	Dec 2024	Water
Glacier Hills	Wisconsin Electric Power Co	Cambria, WI	375 GWh	Nov 2011	Sep 2025	Wind
South Oak Creek	Wisconsin Electric Power Co	Oak Creek, WI	2 TWh	Nov 1959	Sep 2025	Subbituminous Coal : 99.7%
Port Washington Generating Station	Wisconsin Electric Power Co	Port Washington, WI	7 TWh	Jun 2005	Sep 2025	Natural Gas
Whitewater Generating Station	Wisconsin Electric Power Co	Whitewater, WI	863 GWh	Aug 1997	Sep 2025	Natural Gas
White Rapids	Wisconsin Electric Power Co	Stephenson, MI	30 GWh	Sep 1927	Dec 2024	Water
Big Quinnesec 61	Wisconsin Electric Power Co	Iron Mountain, MI	4 GWh	Apr 1914	Dec 2024	Water
Brule	Wisconsin Electric Power Co	Florence, WI	16 GWh	Dec 1918	Dec 2024	Water
Chalk Hill	Wisconsin Electric Power Co	Stephenson, MI	14 GWh	Apr 1927	Dec 2024	Water
Hemlock Falls	Wisconsin Electric Power Co	Crystal Falls, MI	6 GWh	Jul 1953	Dec 2024	Water
Kingsford	Wisconsin Electric Power Co	Kingsford, MI	25 GWh	Apr 1924	Dec 2024	Water
Michigamme Falls	Wisconsin Electric Power Co	Crystal Falls, MI	23 GWh	May 1953	Dec 2024	Water
Montfort Wind Energy Center	Wisconsin Electric Power Co	Montfort, WI	56 GWh	May 2002	Sep 2025	Wind
Elm Road Generating Station	Wisconsin Electric Power Co	Oak Creek, WI	7 TWh	Jan 2010	Sep 2025	Subbituminous Coal : 79.7% Bituminous Coal : 17.0% Natural Gas : 3.3%
Big Quinnesec 92	Wisconsin Electric Power Co	Iron Mountain, MI	89 GWh	Oct 1949	Dec 2024	Water
Paris (WI)	Wisconsin Electric Power Co	Union Grove, WI	227 GWh	Feb 1995	Dec 2024	Natural Gas
Concord	Wisconsin Electric Power Co	Watertown, WI	175 GWh	Jun 1993	Dec 2024	Natural Gas : 99.8%
Peavy Falls	Wisconsin Electric Power Co	Crystal Falls, MI	37 GWh	Dec 1942	Dec 2024	Water
Way Dam	Wisconsin Electric Power Co	Crystal Falls, MI	5 GWh	Nov 1949	Dec 2024	Water
Germantown	Wisconsin Electric Power Co	Germantown, WI	28 GWh	Jun 1978	Dec 2024	Natural Gas : 94.1% Distillate Fuel Oil : 5.9%
Blue Sky Green Field Wind Project	Wisconsin Electric Power Co	Fond du Lac, WI	341 GWh	Apr 2008	Sep 2025	Wind
Wiota	Wiota Wind Energy, LLC #1	Wiota, IA	4 GWh	Apr 2012	Dec 2024	Wind
Winona Solar	Winona Solar I LLC	Altura, MN	2 GWh	Jul 2019	Dec 2024	Solar
Winona Garden	Winona Garden LLC	Altura, MN	2 GWh	Oct 2023	Dec 2024	Solar
Winnebago County Landfill Gas	Winnebago County	Oshkosh, WI	9 GWh	Jan 2000	Dec 2024	Landfill Gas
Winfield Solar	Winfield Solar I, LLC	Winfield, MO	140 GWh	-	Sep 2025	Solar
Windcurrent Farms LLC	Windcurrent Farms LLC	Woodstock, MN	5 GWh	Aug 2003	Dec 2024	Wind
Wind GEM	Wind GEM, LLC	Stuart, IA	5 GWh	Aug 2015	Dec 2024	Wind
Wilton Wind II LLC	Wilton Wind II LLC	Wilton, ND	200 GWh	Oct 2009	Dec 2024	Wind
Willmar	Willmar Municipal Utilities	Willmar, MN	5 GWh	Aug 1956	Jul 2024	Wind
Willmar Municipal East Substation	Willmar Municipal Utilities	Willmar, MN	23 MWh	May 2000	Dec 2024	Distillate Fuel Oil
Willmar Municipal SW Substation	Willmar Municipal Utilities	Willmar, MN	22 MWh	May 2000	Dec 2024	Distillate Fuel Oil
Willford Solar, LLC	Willford Solar, LLC	Gladwin, MI	34 GWh	Sep 2023	Dec 2024	Solar
Whiteside Solar 1 CSG	Whiteside Solar 1, LLC	Fulton, IL	2 GWh	Nov 2020	Dec 2024	Solar
White Oak Energy LLC	White Oak Energy LLC	Carlock, IL	376 GWh	May 2011	Dec 2024	Wind
Westside Solar	Westside Solar, LLC (Ecofin)	Rochester, MN	17 GWh	Nov 2022	Dec 2024	Solar
WestRock (TX)	WestRock (TX)	Evadale, TX	415 GWh	May 1954	Dec 2024	Black Liquor : 58.9% Wood/Wood Waste Solids : 22.0% Natural Gas : 19.1%
Westrock Hodge (LA)	Westrock (LA)	Hodge, LA	466 GWh	Nov 1952	Dec 2024	Black Liquor : 50.4% Natural Gas : 35.5% Wood/Wood Waste Solids : 14.2%
Westridge Windfarm LLC	Westridge Windfarm LLC	Woodstock, MN	288 MWh	Oct 2003	Dec 2024	Wind
Westlake Plaquemine	Westlake Chemicals & Vinyls LLC	Plaquemine, LA	2 TWh	Apr 1997	Sep 2025	Natural Gas : 98.5% Other Gas : 1.5%
PPG Plant C Caustic	Westlake 2 US LLC	Lake Charles, LA	14 GWh	Sep 1986	Dec 2024	Natural Gas
PPG Powerhouse C	Westlake 2 US LLC	Lake Charles, LA	2 TWh	Jul 1977	Sep 2025	Natural Gas : 99.5%
RS Cogen	Westlake 2 US LLC	Lake Charles, LA	3 TWh	Nov 2002	Sep 2025	Natural Gas
PPG Riverside	Westlake 2 US LLC	Lake Charles, LA	59 GWh	Aug 1947	Jul 2025	Purchased Steam
Red Rock Hydro Plant	Western Minnesota Mun Pwr Agny	Pella, IA	165 GWh	Apr 2021	Sep 2025	Water
Marshall Solar Plus LLC	Western Minnesota Mun Pwr Agny	Marshall, MN	539 MWh	Nov 2024	Dec 2024	Solar
Western Michigan University Power Plant	Western Michigan University	Kalamazoo, MI	70 GWh	Jul 1997	Dec 2024	Natural Gas
Webster Holdco Solar CSG	Webster Holdco LLC	Webster, MN	7 GWh	Jun 2017	Dec 2024	Solar
South Plant (IA)	Waverly Municipal Elec Utility	Waverly, IA	51 MWh	Apr 2000	Dec 2024	Distillate Fuel Oil
Waverly Community Wind Project	Waverly Municipal Elec Utility	Waverly, IA	6 GWh	Nov 2001	Dec 2024	Wind
Waverly Municipal Electric North Plant	Waverly Municipal Elec Utility	Waverly, IA	232 MWh	Jul 1958	Dec 2024	Distillate Fuel Oil : 55.1% Natural Gas : 44.9%
Waterford Holdco CSG	Waterford Holdco LLC	Waterford, MN	4 GWh	Oct 2017	Dec 2024	Solar
Washington Island	Washington Island El Coop, Inc	Washington Island, WI	9 MWh	Nov 1945	Dec 2023	Distillate Fuel Oil
Wapello Solar LLC	Wapello Solar LLC	Wapello, IA	210 GWh	Feb 2021	Sep 2025	Solar
Walnut Bend Solar Station PV	Walnut Bend Solar Station	Moro, AR	227 GWh	Aug 2024	Sep 2025	Solar
Walleye Wind	Walleye Wind, LLC	Beaver Creek, MN	472 GWh	Nov 2022	Sep 2025	Wind
Wabasha Solar	Wabasha Solar LLC	Wabasha, MN	2 GWh	Jul 2019	Dec 2024	Solar
Wabasha Holdco Solar CSG	Wabasha Holdco LLC	Wabasha, MN	2 GWh	Feb 2017	Dec 2024	Solar
Clinton LFGTE	Wabash Valley Power Assn, Inc	Clinton, IL	18 GWh	Jan 2006	Sep 2025	Landfill Gas
Wabash Valley Power IGCC	Wabash Valley Power Assn, Inc	Terre Haute, IN	340 GWh	Nov 1953	Sep 2025	Natural Gas
Deercroft I & II LFGTE	Wabash Valley Power Assn, Inc	Michigan City, IN	19 GWh	Jul 1999	Dec 2024	Landfill Gas
Oak Ridge LFGTE	Wabash Valley Power Assn, Inc	Logansport, IN	26 GWh	Nov 2003	Dec 2024	Landfill Gas
Liberty I & II LFGTE	Wabash Valley Power Assn, Inc	Monticello, IN	27 GWh	Jul 2005	Dec 2023	Landfill Gas
Prairie View I & II LFGTE	Wabash Valley Power Assn, Inc	Wyatt, IN	31 GWh	Sep 1994	Dec 2023	Landfill Gas
Twin Bridges LFGTE	Wabash Valley Power Assn, Inc	Danville, IN	6 GWh	Sep 1994	Dec 2023	Landfill Gas
Baldwin Solar BESS	Vistra Corp	Baldwin, IL	121 GWh	Nov 2024	Sep 2025	Solar
Coffeen Solar BESS	Vistra Corp	Coffeen, IL	74 GWh	Nov 2024	Sep 2025	Solar
Viresco Turtle Lake	Viresco Turtle Lake	Turtle Lake, WI	8 GWh	Aug 2013	Dec 2024	Other Biomass Gas
Viola	Village of Viola - (WI)	Viola, WI	5 MWh	Dec 2001	Dec 2024	Distillate Fuel Oil
Pine Street	Village of Sebewaing - (MI)	Sebewaing, MI	14 GWh	May 1969	Dec 2024	Natural Gas
Main Street (MI)	Village of Sebewaing - (MI)	Sebewaing, MI	1 MWh	May 1947	Dec 2023	Distillate Fuel Oil
Rantoul	Village of Rantoul - (IL)	Rantoul, IL	200 MWh	Dec 1950	Sep 2025	Distillate Fuel Oil
Freeburg	Village of Freeburg - (IL)	Freeburg, IL	122 MWh	Jul 1948	Dec 2024	Distillate Fuel Oil
Cashton	Village of Cashton - (WI)	Cashton, WI	8 MWh	Jul 1932	Dec 2024	Distillate Fuel Oil : 98.9% Natural Gas : 1.1%
Viking Solar CSG	Viking Solar, LLC	Palmyra, IL	5 GWh	May 2021	Dec 2024	Solar
Veseli Community Solar Garden	Veseli Solar I LLC	Webster, MN	2 GWh	Jan 2018	Dec 2024	Solar
Vermilion Solar 1, LLC CSG	Vermilion Solar 1, LLC	Danville, IL	3 GWh	Nov 2020	Dec 2024	Solar
Venus Wind 3 LLC	Venus Wind 3 LLC	Grinnell, IA	10 GWh	Feb 2017	Dec 2024	Wind
Vega Community Solar	Vega Community Solar	Glenwood, MN	8 GWh	Sep 2017	Dec 2024	Solar
Valley Queen Cheese	Valley Queen Cheese Factory, Inc.	Milbank, SD	24 MWh	Mar 2002	Jun 2025	Distillate Fuel Oil
USG Paper, LLC - Orange Mill	USG Paper LLC	Orange, TX	239 GWh	Oct 1967	Dec 2023	Black Liquor : 59.3% Wood/Wood Waste Solids : 39.8% Tire-derived Fuels : 0.9%
Blakely Mountain	USCE -Vickburg District	Royal, AR	158 GWh	Aug 1955	Dec 2024	Water
Degray	USCE -Vickburg District	Arkadelphia, AR	211 GWh	Jan 1972	Sep 2025	Water
Sam Rayburn Dam	USACE-Fort Worth District	Jasper, TX	199 GWh	Aug 1965	Dec 2024	Water
Saint Marys Falls	USACE-Detroit District	Sault Ste. Marie, MI	155 GWh	Jun 1932	Dec 2024	Water
Ursa Community Solar	Ursa Community Solar	Farmington, MN	8 GWh	Dec 2016	Dec 2024	Solar
Victoria Dam	Upper Peninsula Power Company	Rockland, MI	26 GWh	Dec 1930	Dec 2024	Water
Hoist	Upper Peninsula Power Company	Negaunee, MI	13 GWh	Jan 1988	Dec 2024	Water
McClure Dam	Upper Peninsula Power Company	Marquette, MI	32 GWh	Jan 1988	Dec 2024	Water

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