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
RS Cogen	Westlake 2 US LLC	Lake Charles, LA	3 TWh	Nov 2002	May 2026	Natural Gas
Westlake Plaquemine	Westlake Chemicals & Vinyls LLC	Plaquemine, LA	1 TWh	Apr 1997	May 2026	Natural Gas : 99.0% Other Gas : 1.0%
Westridge Windfarm LLC	Westridge Windfarm LLC	Woodstock, MN	4 GWh	Oct 2003	Dec 2025	Wind
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%
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%
Westside Solar	Westside Solar, LLC (Ecofin)	Rochester, MN	19 GWh	Nov 2022	Dec 2025	Solar
White Oak Energy LLC	White Oak Energy LLC	Carlock, IL	400 GWh	May 2011	Dec 2025	Wind
White Tail Solar	White Tail Solar, LLC	Milan, MI	99 GWh	Oct 2025	May 2026	Solar
Whiteside Solar 1 CSG	Whiteside Solar 1, LLC	Fulton, IL	4 GWh	Nov 2020	Dec 2025	Solar
Wildwood Solar Plant	Wildwood Solar, LLC	Tutwiler, MS	104 GWh	Nov 2025	May 2026	Solar
Willford Solar, LLC	Willford Solar, LLC	Gladwin, MI	41 GWh	Sep 2023	Dec 2025	Solar
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
Wilton Wind II LLC	Wilton Wind II LLC	Wilton, ND	201 GWh	Oct 2009	Dec 2025	Wind
Wind GEM	Wind GEM, LLC	Stuart, IA	5 GWh	Aug 2015	Dec 2025	Wind
Windcurrent Farms LLC	Windcurrent Farms LLC	Woodstock, MN	5 GWh	Aug 2003	Dec 2025	Wind
Winfield Solar	Winfield Solar I, LLC	Winfield, MO	281 GWh	Apr 2025	May 2026	Solar
Winnebago County Landfill Gas	Winnebago County - (WI)	Oshkosh, WI	3 GWh	Jan 2000	Dec 2025	Landfill Gas
Winona Garden	Winona Garden LLC	Altura, MN	2 GWh	Oct 2023	Dec 2025	Solar
Winona Solar	Winona Solar I LLC	Altura, MN	4 GWh	Jul 2019	Dec 2025	Solar
Wiota	Wiota Wind Energy, LLC #1	Wiota, IA	5 GWh	Apr 2012	Dec 2025	Wind
Badger Hollow II	Wisconsin Electric Power Co	Cobb, WI	213 GWh	Nov 2023	May 2026	Solar
Twin Falls (WI)	Wisconsin Electric Power Co	Florence, WI	37 GWh	Jun 2016	Dec 2025	Water
Darien Solar	Wisconsin Electric Power Co	Darien, WI	366 GWh	Feb 2025	May 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%
Lannon Stone	Wisconsin Electric Power Co	Pewaukee, WI	4 GWh	Nov 2021	Dec 2025	Solar
Regal Ware	Wisconsin Electric Power Co	West Bend, WI	3 GWh	Mar 2021	May 2025	Solar
ATI	Wisconsin Electric Power Co	Cudahy, WI	3 GWh	Oct 2020	Dec 2025	Solar
Spring Brook Solar WI, LLC	Wisconsin Electric Power Co	Whitewater, WI	630 MWh	Sep 2025	Dec 2025	Solar
Rock LakeSolar WI, LLC	Wisconsin Electric Power Co	Waterloo, WI	318 MWh	Oct 2025	Dec 2025	Solar
Antigo Solar Partners, LLC	Wisconsin Electric Power Co	Antigo, WI	9 GWh	Oct 2025	Dec 2025	Solar
La Grange Solar Partners, LLC	Wisconsin Electric Power Co	Elkhorn, WI	405 MWh	Oct 2025	Dec 2025	Solar
Jones Dairy	Wisconsin Electric Power Co	Fort Atkinson, WI	4 GWh	Jun 2021	Dec 2025	Solar
Washington County	Wisconsin Electric Power Co	West Bend, WI	4 GWh	Dec 2019	Dec 2025	Solar
Adams Road Solar	Wisconsin Electric Power Co	Franksville, WI	6 MWh	Nov 2025	Dec 2025	Solar
UW Parkside	Wisconsin Electric Power Co	Kenosha, WI	4 GWh	Oct 2020	Dec 2025	Solar
CREE	Wisconsin Electric Power Co	Racine, WI	2 GWh	Jul 2021	Dec 2025	Solar
Paris Solar	Wisconsin Electric Power Co	Union Grove, WI	296 GWh	Nov 2024	May 2026	Solar
City of Milwaukee Landfill	Wisconsin Electric Power Co	Milwaukee, WI	3 GWh	Jan 2021	Dec 2025	Solar
Hackbarth Solar WI, LLC	Wisconsin Electric Power Co	Fort Atkinson, WI	9 GWh	Nov 2024	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
Caledonia Solar WI, LLC	Wisconsin Electric Power Co	Caledonia, WI	9 GWh	Mar 2025	Dec 2025	Solar
Raymond Solar WI, LLC	Wisconsin Electric Power Co	Franksville, WI	8 GWh	Jan 2025	Dec 2025	Solar
Silver Lake Solar WI, LLC	Wisconsin Electric Power Co	Salem, WI	9 GWh	Nov 2023	Dec 2025	Solar
Bonduel Solar WI, LLC	Wisconsin Electric Power Co	Bonduel, WI	12 GWh	Nov 2023	Dec 2025	Solar
Auburn Solar WI, LLC	Wisconsin Electric Power Co	Campbellsport, WI	9 GWh	Nov 2024	Dec 2025	Solar
Harley-Davison Powertrain Operations	Wisconsin Electric Power Co	Menomonee Falls, WI	3 GWh	Sep 2020	Dec 2025	Solar
Spring Prairie Solar WI, LLC	Wisconsin Electric Power Co	Burlington, WI	13 GWh	Nov 2023	Dec 2025	Solar
Glacier Hills	Wisconsin Electric Power Co	Cambria, WI	336 GWh	Nov 2011	May 2026	Wind
Big Quinnesec 92	Wisconsin Electric Power Co	Iron Mountain, MI	100 GWh	Oct 1949	Dec 2025	Water
Big Quinnesec 61	Wisconsin Electric Power Co	Iron Mountain, MI	2 GWh	Apr 1914	Dec 2025	Water
Whitewater Generating Station	Wisconsin Electric Power Co	Whitewater, WI	441 GWh	Aug 1997	May 2026	Natural Gas
Pine	Wisconsin Electric Power Co	Florence, WI	11 GWh	May 1922	Dec 2025	Water
Appleton	Wisconsin Electric Power Co	Appleton, WI	12 GWh	Jul 1916	Dec 2025	Water
Valley (WI)	Wisconsin Electric Power Co	Milwaukee, WI	376 GWh	May 1968	May 2026	Natural Gas
South Oak Creek	Wisconsin Electric Power Co	Oak Creek, WI	2 TWh	Nov 1959	May 2026	Subbituminous Coal : 99.5%
Germantown	Wisconsin Electric Power Co	Germantown, WI	33 GWh	Jun 1978	Dec 2025	Natural Gas : 83.1% Distillate Fuel Oil : 16.9%
Port Washington Generating Station	Wisconsin Electric Power Co	Port Washington, WI	7 TWh	Jun 2005	May 2026	Natural Gas
Brule	Wisconsin Electric Power Co	Florence, WI	12 GWh	Dec 1918	Dec 2025	Water
Chalk Hill	Wisconsin Electric Power Co	Stephenson, MI	34 GWh	Apr 1927	Dec 2025	Water
Hemlock Falls	Wisconsin Electric Power Co	Crystal Falls, MI	9 GWh	Jul 1953	Oct 2025	Water
Concord	Wisconsin Electric Power Co	Watertown, WI	203 GWh	Jun 1993	Dec 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Kingsford	Wisconsin Electric Power Co	Kingsford, MI	26 GWh	Apr 1924	Dec 2025	Water
Montfort Wind Energy Center	Wisconsin Electric Power Co	Montfort, WI	51 GWh	May 2002	May 2026	Wind
Michigamme Falls	Wisconsin Electric Power Co	Crystal Falls, MI	29 GWh	May 1953	Dec 2025	Water
Elm Road Generating Station	Wisconsin Electric Power Co	Oak Creek, WI	8 TWh	Jan 2010	May 2026	Subbituminous Coal : 86.7% Bituminous Coal : 10.5% Natural Gas : 2.8%
Paris (WI)	Wisconsin Electric Power Co	Union Grove, WI	215 GWh	Feb 1995	Dec 2025	Natural Gas
Blue Sky Green Field Wind Project	Wisconsin Electric Power Co	Fond du Lac, WI	320 GWh	Apr 2008	May 2026	Wind
Peavy Falls	Wisconsin Electric Power Co	Crystal Falls, MI	48 GWh	Dec 1942	Dec 2025	Water
Way Dam	Wisconsin Electric Power Co	Crystal Falls, MI	6 GWh	Nov 1949	Dec 2025	Water
White Rapids	Wisconsin Electric Power Co	Stephenson, MI	33 GWh	Sep 1927	Dec 2025	Water
Columbia (WI)	Wisconsin Power & Light Co	Pardeville, WI	6 TWh	Apr 1975	May 2026	Subbituminous Coal : 99.9%
Alliant Energy Neenah	Wisconsin Power & Light Co	Neenah, WI	483 GWh	Apr 2000	Dec 2025	Natural Gas
Bent Tree Wind Farm Phase 1	Wisconsin Power & Light Co	Hartland, MN	334 GWh	Jan 2011	Dec 2025	Wind
Prairie Du Sac	Wisconsin Power & Light Co	Prairie du Sac, WI	153 GWh	Sep 1915	Dec 2025	Water
Kilbourn	Wisconsin Power & Light Co	Wisconsin Dells, WI	49 GWh	Jun 1926	Dec 2025	Water
Edgewater	Wisconsin Power & Light Co	Sheboygan, WI	2 TWh	Jun 1951	May 2026	Subbituminous Coal : 99.8%
Cedar Ridge	Wisconsin Power & Light Co	Eden, WI	185 GWh	Nov 2008	Dec 2025	Wind
Sheboygan Falls	Wisconsin Power & Light Co	Sheboygan, WI	452 GWh	May 2005	Dec 2025	Natural Gas
Riverside Energy Center	Wisconsin Power & Light Co	Beloit, WI	4 TWh	May 2004	May 2026	Natural Gas
South Fond Du Lac	Wisconsin Power & Light Co	Fond du Lac, WI	20 GWh	Apr 1993	Dec 2025	Natural Gas : 99.8%
Kossuth	Wisconsin Power & Light Co	Lu Verne, IA	539 GWh	Sep 2020	May 2026	Wind
West Riverside Energy Center	Wisconsin Power & Light Co	Beloit, WI	4 TWh	Apr 2020	May 2026	Natural Gas : 99.9%
Springfield Solar (WI)	Wisconsin Power & Light Co	Lomira, WI	206 GWh	Nov 2023	May 2026	Solar
Nortera Customer Hosted Solar	Wisconsin Power & Light Co	Fairwater, WI	307 MWh	Jul 2025	Dec 2025	Solar
UW Kegonsa Customer Hosted Solar	Wisconsin Power & Light Co	Stoughton, WI	2 GWh	Apr 2025	Dec 2025	Solar
Rock County Customer Hosted Solar	Wisconsin Power & Light Co	Janesville, WI	2 GWh	Mar 2025	Dec 2025	Solar
Janesville Community Solar	Wisconsin Power & Light Co	Janesville, WI	3 GWh	Mar 2025	Dec 2025	Solar
Kohler Solar	Wisconsin Power & Light Co	Kohler, WI	3 GWh	May 2022	Dec 2025	Solar
Onion River	Wisconsin Power & Light Co	Sheboygan Cedar Grove, WI	260 GWh	Nov 2023	May 2026	Solar
Crawfish River	Wisconsin Power & Light Co	Jefferson, WI	130 GWh	Nov 2023	May 2026	Solar
Wood County	Wisconsin Power & Light Co	Nekoosa, WI	273 GWh	Nov 2022	May 2026	Solar
North Rock	Wisconsin Power & Light Co	Edgerton, WI	93 GWh	Sep 2022	May 2026	Solar
Bear Creek (WI)	Wisconsin Power & Light Co	Lone Rock, WI	100 GWh	Aug 2022	May 2026	Solar
Cassville Solar	Wisconsin Power & Light Co	Cassville, WI	99 GWh	Nov 2023	May 2026	Solar
Grant County	Wisconsin Power & Light Co	Town of Potosi, WI	375 GWh	Apr 2024	May 2026	Solar
Beaver Dam Solar	Wisconsin Power & Light Co	Dodge, WI	101 GWh	Nov 2023	May 2026	Solar
Wautoma Solar	Wisconsin Power & Light Co	Wautoma, WI	190 GWh	Nov 2023	May 2026	Solar
Paddock Solar	Wisconsin Power & Light Co	Beloit, WI	135 GWh	Oct 2023	May 2026	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