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
Osage Dam	Union Electric Co - (MO)	Eldon, MO	499 GWh	Sep 1931	Dec 2025	Water
Sioux	Union Electric Co - (MO)	West Alton, MO	4 TWh	Apr 1967	Jul 2026	Subbituminous Coal : 80.6% Bituminous Coal : 19.3%
Keokuk	Union Electric Co - (MO)	Keokuk, IA	962 GWh	Jul 1913	Dec 2025	Water
Audrain Generating Station	Union Electric Co - (MO)	Vandalia, MO	403 GWh	Jan 2001	Dec 2025	Natural Gas
Pinckneyville	Union Electric Co - (MO)	Pinckneyville, IL	67 GWh	May 2000	Nov 2025	Natural Gas
Peno Creek	Union Electric Co - (MO)	Bowling Green, MO	156 GWh	Apr 2002	Dec 2025	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Callaway	Union Electric Co - (MO)	Fulton, MO	10 TWh	Nov 1984	Jul 2026	Nuclear
Venice	Union Electric Co - (MO)	Venice, IL	18 GWh	May 2002	Dec 2025	Natural Gas
Kinmundy	Union Electric Co - (MO)	Patoka, IL	3 GWh	Mar 2001	Nov 2025	Natural Gas
USS Peach Solar LLC	United States Solar Corporation	Mankato, MN	2 GWh	Jun 2022	Dec 2025	Solar
USS Danube Solar LLC	United States Solar Corporation	Danube, MN	2 GWh	Nov 2021	Dec 2025	Solar
MN Buffalo Lake 212-2 LLC (CSG)	United States Solar Corporation	Buffalo Lake, MN	2 GWh	Nov 2023	Dec 2025	Solar
USS Quail Solar LLC	United States Solar Corporation	Monticello, MN	2 GWh	Dec 2021	Dec 2025	Solar
Helen CSG 1 LLC	United States Solar Corporation	Plato, MN	2 GWh	Oct 2021	Dec 2025	Solar
USS Wildcat Solar LLC	United States Solar Corporation	Goodhue, MN	2 GWh	Oct 2021	Dec 2025	Solar
USS Golly Gee Solar LLC	United States Solar Corporation	Clear Lake, MN	2 GWh	Jun 2023	Dec 2025	Solar
USS Dressen Family Solar LLC	United States Solar Corporation	Mayer, MN	2 GWh	Jun 2023	Dec 2025	Solar
USS Wolf Solar LLC	United States Solar Corporation	Wood Lake, MN	2 GWh	Jun 2023	Dec 2025	Solar
USS Franklin Solar LLC	United States Solar Corporation	Franklin, MN	2 GWh	Dec 2022	Dec 2025	Solar
USS Wonder Solar LLC	United States Solar Corporation	Bird Island, MN	2 GWh	Jun 2023	Dec 2025	Solar
MP CSG 1 LLC	United States Solar Corporation	Wrenshall, MN	2 GWh	Dec 2017	Dec 2025	Solar
USS Martha Solar (CSG)	United States Solar Corporation	Hamburg, MN	2 GWh	Dec 2023	Dec 2025	Solar
USS Cosmo Solar LLC (CSG)	United States Solar Corporation	Danube, MN	2 GWh	Nov 2023	Dec 2025	Solar
Courtland CSG LLC	United States Solar Corporation	Courtland, MN	2 GWh	Jun 2023	Dec 2025	Solar
USS Fair Park Solar LLC (CSG)	United States Solar Corporation	Faribault, MN	2 GWh	Nov 2023	Dec 2025	Solar
USS Catfish Solar LLC	United States Solar Corporation	Franklin, MN	2 GWh	Dec 2022	Dec 2025	Solar
USS Itasca Clean Energy Solar LLC	United States Solar Corporation	Grand Rapids, MN	4 GWh	Jul 2022	Dec 2025	Solar
USS Verbena Solar LLC	United States Solar Corporation	Stewart, MN	2 GWh	Sep 2022	Sep 2025	Solar
USS Wells Creek Solar LLC	United States Solar Corporation	Goodhue, MN	2 GWh	Dec 2022	Dec 2025	Solar
USS Mesa Solar LLC	United States Solar Corporation	Danube, MN	2 GWh	Dec 2022	Dec 2025	Solar
USS Rosebud Solar LLC	United States Solar Corporation	Morgan, MN	2 GWh	Jul 2022	Dec 2025	Solar
USS Maverick Solar LLC (CSG)	United States Solar Corporation	Good Thunder, MN	1 GWh	Nov 2023	Dec 2025	Solar
USS Riley Solar LLC (CSG)	United States Solar Corporation	Montevideo, MN	2 GWh	Nov 2023	Dec 2025	Solar
USS University Park Solar	United States Solar Corporation	University Park, IL	3 GWh	Apr 2025	Dec 2025	Solar
USS Foley Solar LLC	United States Solar Corporation	Foley, MN	2 GWh	Jun 2022	Dec 2025	Solar
USS Prokosch Solar LLC	United States Solar Corporation	Bird Island, MN	2 GWh	May 2022	Dec 2025	Solar
USS Jayhawk Solar LLC (CSG)	United States Solar Corporation	Mankato, MN	2 GWh	Nov 2023	Dec 2025	Solar
Spring Prairie Solar LLC CSG	United States Solar Corporation	Glyndon, MN	2 GWh	Apr 2024	Dec 2025	Solar
MN East Regal LLC (CSG)	United States Solar Corporation	Paynesville, MN	2 GWh	Jul 2024	Dec 2025	Solar
USS Slayton Solar LLC (CSG)	United States Solar Corporation	Slayton, MN	2 GWh	Jul 2024	Dec 2025	Solar
USS Rosewood Solar LLC (CSG)	United States Solar Corporation	Montevideo, MN	2 GWh	Jul 2024	Dec 2025	Solar
USS Golden Spike Solar LLC CSG	United States Solar Corporation	Sauk Rapids, MN	379 MWh	Sep 2025	Dec 2025	Solar
MN Buffalo Lake 212-1 LLC (CSG)	United States Solar Corporation	Buffalo Lake, MN	2 GWh	Nov 2023	Dec 2025	Solar
USS Water City Solar LLC CSG	United States Solar Corporation	Waterville, MN	2 GWh	Sep 2021	Dec 2025	Solar
USS Water Town Solar LLC CSG	United States Solar Corporation	Waterville, MN	2 GWh	Oct 2021	Dec 2025	Solar
USS Water Fowl Solar LLC CSG	United States Solar Corporation	Silver Lake, MN	807 MWh	Aug 2022	Dec 2025	Solar
USS Kasch Solar CSG	United States Solar Corporation	Sauk Rapids, MN	2 GWh	Sep 2018	Dec 2025	Solar
USS Chariot Solar LLC	United States Solar Corporation	Danube, MN	2 GWh	Dec 2020	Dec 2025	Solar
USS Pheasant Solar LLC CSG	United States Solar Corporation	Clara City, MN	2 GWh	Oct 2020	Dec 2025	Solar
USS Hancock Solar LLC CSG	United States Solar Corporation	Cologne, MN	2 GWh	Dec 2020	Dec 2025	Solar
USS Bush Solar LLC CSG	United States Solar Corporation	Owatonna, MN	2 GWh	Sep 2020	Dec 2025	Solar
USS Reindeer Solar LLC CSG	United States Solar Corporation	Sauk Rapids, MN	2 GWh	Nov 2020	Dec 2025	Solar
USS Rockpoint Solar CSG	United States Solar Corporation	Stacy, MN	2 GWh	Nov 2018	Dec 2025	Solar
USS Solar Rapids CSG	United States Solar Corporation	Sauk Rapids, MN	2 GWh	Dec 2018	Dec 2025	Solar
USS Brockway Solar CSG	United States Solar Corporation	Sartell, MN	2 GWh	Dec 2018	Dec 2025	Solar
USS Dubhe Solar CSG	United States Solar Corporation	North Branch, MN	2 GWh	Nov 2018	Dec 2025	Solar
USS JJ Solar CSG	United States Solar Corporation	Sauk Rapids, MN	2 GWh	Dec 2018	Dec 2025	Solar
USS Nillie Corn Solar CSG	United States Solar Corporation	North Branch, MN	2 GWh	Nov 2018	Dec 2025	Solar
USS Norelius Solar CSG	United States Solar Corporation	North Branch, MN	2 GWh	Dec 2018	Dec 2025	Solar
USS Solar Dawn CSG	United States Solar Corporation	North Branch, MN	2 GWh	Nov 2018	Nov 2025	Solar
USS Big Lake 1 Solar CSG	United States Solar Corporation	Big Lake, MN	2 GWh	Nov 2018	Dec 2025	Solar
USS Hubers Solar LLC CSG	United States Solar Corporation	Northfield, MN	2 GWh	Dec 2020	Dec 2025	Solar
USS Good Solar CSG	United States Solar Corporation	Stacy, MN	2 GWh	Nov 2018	Dec 2025	Solar
USS Viceroy Solar LLC CSG	United States Solar Corporation	Brooten, MN	2 GWh	Dec 2020	Dec 2025	Solar
USS Bluff Country Solar CSG	United States Solar Corporation	Altura, MN	2 GWh	Nov 2020	Dec 2025	Solar
Granite City Works	United States Steel Granite City Works	Granite City, IL	448 GWh	May 2010	Jul 2026	Purchased Steam : 49.2% Natural Gas : 43.8% Blast Furnace Gas : 7.0%
Gary Works	United States Steel-Gary	Gary, IN	995 GWh	Mar 1997	May 2026	Blast Furnace Gas : 57.0% Natural Gas : 43.0%
University of Illinois Abbott Power Plt	University of Illinois	Champaign, IL	213 GWh	Oct 1940	Dec 2025	Natural Gas : 97.0% Bituminous Coal : 3.0%
University of Michigan	University of Michigan	Ann Arbor, MI	232 GWh	Dec 1974	Jul 2026	Natural Gas
Warner Lambert	University of Michigan NCampus Research	Ann Arbor, MI	24 GWh	Jul 1989	Jul 2026	Natural Gas
Univ Minnesota CHP Plant	University of Minnesota Central Utilities	Minneapolis, MN	172 GWh	Oct 2017	Dec 2025	Natural Gas : 99.7%
UMM Wind Turbine	University of Minnesota Morris Campus	Morris, MN	3 GWh	May 2011	Dec 2025	Wind
WCROC Wind Farm	University of Minnesota WCROC	Morris, MN	1 GWh	Feb 2005	Dec 2025	Wind
University of Northern Iowa	University of Northern Iowa	Cedar Falls, IA	25 GWh	Oct 1982	Jul 2026	Natural Gas : 71.8% Petroleum Coke : 19.8% Bituminous Coal : 8.2%
A.J. Mihm Generating Station	Upper Michigan Energy Resources Company	Pelkie, MI	185 GWh	Feb 2019	Dec 2025	Natural Gas
F.D. Kuester Generating Station	Upper Michigan Energy Resources Company	Negaunee, MI	368 GWh	Feb 2019	Dec 2025	Natural Gas
Renegade Solar Energy LLC	Upper Michigan Energy Resources Company	Rock, MI	88 GWh	-	Jul 2026	Solar
McClure Dam	Upper Peninsula Power Company	Marquette, MI	26 GWh	Jan 1988	Dec 2025	Water
Victoria Dam	Upper Peninsula Power Company	Rockland, MI	54 GWh	Dec 1930	Dec 2025	Water
Prickett	Upper Peninsula Power Company	Pelkie, MI	6 GWh	Oct 1931	Dec 2025	Water
Hoist	Upper Peninsula Power Company	Negaunee, MI	14 GWh	Jan 1988	Dec 2025	Water
Ursa Community Solar	Ursa Community Solar	Farmington, MN	8 GWh	Dec 2016	Dec 2025	Solar
Saint Marys Falls	USACE-Detroit District	Sault Ste. Marie, MI	156 GWh	Jun 1932	Dec 2025	Water
Sam Rayburn Dam	USACE-Fort Worth District	Jasper, TX	208 GWh	Aug 1965	Dec 2025	Water
Blakely Mountain	USCE -Vickburg District	Royal, AR	216 GWh	Aug 1955	Dec 2025	Water
Degray	USCE -Vickburg District	Arkadelphia, AR	75 GWh	Jan 1972	Jul 2026	Water
USS Cattail Solar	USS Cattail Solar LLC	Fulton, IL	1 GWh	Jul 2025	Dec 2025	Solar
USS Ducks Solar CSG	USS Ducks Solar LLC	Oregon, IL	9 MWh	Oct 2025	Dec 2025	Solar
USS Origami Solar	USS Origami Solar LLC	Fulton, IL	1 GWh	Sep 2025	Dec 2025	Solar
Valley Queen Cheese	Valley Queen Cheese Factory, Inc.	Milbank, SD	20 MWh	Mar 2002	Apr 2026	Distillate Fuel Oil
Vega Community Solar	Vega Community Solar	Glenwood, MN	8 GWh	Sep 2017	Dec 2025	Solar
Vermilion Solar 1, LLC CSG	Vermilion Solar 1, LLC	Danville, IL	4 GWh	Nov 2020	Dec 2025	Solar
Veseli Community Solar Garden	Veseli Solar I LLC	Webster, MN	2 GWh	Jan 2018	Dec 2025	Solar
Viking Solar CSG	Viking Solar, LLC	Palmyra, IL	4 GWh	May 2021	Dec 2025	Solar
Cashton	Village of Cashton - (WI)	Cashton, WI	10 MWh	Jul 1932	Dec 2025	Distillate Fuel Oil : 98.3% Natural Gas : 1.7%
Freeburg	Village of Freeburg - (IL)	Freeburg, IL	145 MWh	Jul 1948	Dec 2025	Distillate Fuel Oil
Rantoul	Village of Rantoul - (IL)	Rantoul, IL	313 MWh	Dec 1950	Jul 2026	Distillate Fuel Oil
Pine Street	Village of Sebewaing - (MI)	Sebewaing, MI	462 MWh	May 1969	Dec 2025	Natural Gas
Viola	Village of Viola - (WI)	Viola, WI	15 MWh	Dec 2001	Dec 2025	Distillate Fuel Oil
Viresco Turtle Lake	Viresco Turtle Lake	Turtle Lake, WI	8 GWh	Aug 2013	Dec 2025	Other Biomass Gas

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