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
S&P Windfarm LLC	Brewster	Brewster, MN	5 GWh	Nov 2003	Dec 2025	Wind
SABIC Innovative Plastics Mt. Vernon	SABIC IP Mt. Vernon, LLC	Mount Vernon, IN	580 GWh	May 1996	May 2026	Natural Gas
Sabine	Entergy Texas Inc.	Orange, TX	4 TWh	Dec 1961	May 2026	Natural Gas
Sabine River Operations	The Dow Chemical Company	Orange, TX	3 TWh	Dec 1947	May 2026	Natural Gas : 99.5%
Sac County Wind, LLC	Sac County Wind	Sac City, IA	321 GWh	Nov 2021	May 2026	Wind
Sacred Heart CSG1, LLC	Nautilus Solar Solutions	Sacred Heart, MN	2 GWh	Jul 2021	Dec 2025	Solar
SAF Hydroelectric LLC	SAF Hydroelectric LLC	Minneapolis, MN	30 GWh	Nov 2011	Dec 2025	Water
Sagamore Plant Cogeneration	Tate & Lyle Ingredients Americas Inc	Lafayette, IN	20 GWh	Sep 1984	May 2026	Natural Gas
Sagitta Community Solar	Geronimo Power	Clara City, MN	2 GWh	Nov 2018	Dec 2024	Solar
Saint Marys Falls	USACE-Detroit District	Sault Ste. Marie, MI	156 GWh	Jun 1932	Dec 2025	Water
Saint Marys Hospital Power Plant	St Mary's Hospital	Rochester, MN	55 GWh	Dec 1970	May 2026	Natural Gas : 99.0% Distillate Fuel Oil : 1.0%
Salt Creek Township Solar, LLC	Birch Creek Power, LLC	Mason City, IL	110 GWh	Dec 2024	May 2026	Solar
Salt Creek Wind	Salt Creek Wind, LLC	Traer, IA	360 GWh	Nov 2025	May 2026	Wind
Sam Rayburn Dam	USACE-Fort Worth District	Jasper, TX	208 GWh	Aug 1965	Dec 2025	Water
San Jacinto County Peaking Facility	East Texas Electric Coop, Inc	Shepherd, TX	287 GWh	Jun 2001	Dec 2025	Natural Gas
Sand Lake DPC Solar	SoCore Energy LLC	Centuria, WI	2 GWh	Oct 2017	Dec 2025	Solar
Sandoval	Sandoval Holdco, LLC	Centralia, IL	4 GWh	Feb 2021	Dec 2025	Solar
Sandstone Rapids	Wisconsin Public Service Corp	Town of Stephenson, WI	10 GWh	Dec 1924	Dec 2025	Water
Sapphire Sky Wind Energy LLC	Invenergy Services LLC	Farmer City, IL	957 GWh	Nov 2021	May 2026	Wind
Sappi Cloquet Mill	Sappi Cloquet LLC	Cloquet, MN	461 GWh	Dec 1928	May 2026	Black Liquor : 62.8% Wood/Wood Waste Solids : 17.5% Natural Gas : 15.7% Water : 3.1%
Saratoga Wind Farm	Madison Gas & Electric Co	Lime Springs, IA	260 GWh	Jan 2019	May 2026	Wind
Sartell Dam	Eagle Creek Renewable Energy, LLC	Sartell, MN	30 GWh	Feb 1985	Dec 2025	Water
Sartell Holdco CSG	Sartell Holdco LLC	Sartell, MN	8 GWh	Apr 2019	Dec 2025	Solar
SAU Tech	Today's Power, Inc.	Bearden, AR	2 GWh	Jun 2019	Dec 2025	Solar
Sauk DPC Solar	SoCore Energy LLC	Wonewoc, WI	2 GWh	Dec 2016	Dec 2025	Solar
Sauk Solar Park	DTE Electric Company	Union City, MI	228 GWh	Dec 2024	May 2026	Solar
Saxon Falls	Northern States Power Co - Minnesota	Saxon, WI	9 GWh	Dec 1912	Dec 2025	Water
Scandia Community Solar Garden	Scandia CSG LLC	Scandia, MN	4 GWh	Jun 2018	Dec 2024	Solar
Scandia CSG	Madison Energy Investments LLC	Scandia, MN	9 GWh	Dec 2017	Sep 2025	Solar
Scanlon	ALLETE, Inc.	Scanlon, MN	7 GWh	Dec 1922	Dec 2025	Water
Schmidt CSG 1	SunVest Solar LLC	Belleville, IL	4 GWh	Nov 2024	Dec 2025	Solar
School Sisters CSG	School Sisters CSG LLC	Mankato, MN	2 GWh	Apr 2018	Dec 2025	Solar
Schueler Community Solar	Schueler Community Solar LLC	Annandale, MN	2 GWh	Jul 2020	Dec 2025	Solar
Schull CSG	Schull CSG LLC	Mapleton, MN	2 GWh	Oct 2021	Dec 2025	Solar
Schulte 2 Community Solar	Schulte 2 Community Solar	Lacon, IL	4 GWh	Nov 2020	Dec 2025	Solar
Schultz CSG	Madison Energy Investments LLC	Webster, MN	3 GWh	Oct 2018	Sep 2025	Solar
Schwinghamer Project CSG	Schwinghamer Community Solar LLC	Albany, MN	2 GWh	Nov 2019	Dec 2025	Solar
Scotland Solar RES	Hoosier Energy R E C, Inc	Newberry, IN	1 GWh	Oct 2015	Dec 2025	Solar
Scottsburg Solar Park	Indiana Municipal Power Agency	Scottsburg, IN	11 GWh	Sep 2020	Dec 2025	Solar
SCS American Bottoms 009885 Sauget, LLC	Arevon Energy, Inc.	Sauget, IL	2 GWh	Jul 2020	Dec 2025	Solar
SCS COUNTY 012631 Champaign, LLC	Arevon Energy, Inc.	Champaign, IL	4 GWh	Aug 2021	Dec 2025	Solar
SCS Galena 012589 Peoria, LLC	Arevon Energy, Inc.	Peoria, IL	4 GWh	Nov 2021	Dec 2025	Solar
SCS West Fairchild 011958 Danville, LLC	Arevon Energy, Inc.	Danville, IL	3 GWh	Jun 2021	Dec 2025	Solar
Searcy Solar Hybrid	Searcy Solar, LLC	Searcy, AR	178 GWh	Dec 2021	May 2026	Solar
Searcy Water I	Entegrity Solar SWU, LLC	Searcy, AR	834 MWh	May 2021	Dec 2024	Solar
Searcy Water II	Entegrity Solar SWU 2, LLC	Searcy, AR	4 GWh	May 2021	Dec 2024	Solar
Sebree Solar, LLC	Sebree Solar, LLC	Robards, KY	329 GWh	Aug 2025	May 2026	Solar
Security	TX LFG Energy, LP	Cleveland, TX	6 GWh	Feb 2003	Dec 2024	Landfill Gas
Settlers Trail Wind Farm LLC	RWE Clean Energy	Sheldon, IL	320 GWh	Sep 2011	Dec 2025	Wind
Severson Garden	Severson HoldCo LLC	Waseca, MN	2 GWh	Sep 2020	Dec 2025	Solar
Shakopee Energy Park	Minnesota Municipal Power Agny	Shakopee, MN	57 GWh	Jan 2017	Dec 2025	Natural Gas
Shakopee Met Council WTP	Oak Leaf Solar V LLC	Shakopee, MN	2 GWh	Feb 2016	Dec 2025	Solar
Shamrock Solar LLC	Altus Power America Management, LLC	Black River Falls, WI	6 GWh	Nov 2021	Dec 2025	Solar
Shane's Wind Machine	Shane's Wind Machine LLC	Ruthton, MN	7 GWh	Jun 2006	Jan 2025	Wind
Shaokatan Hills LLC	Shaokatan Hills, LLC (Longroad)	Hendricks, MN	12 GWh	Jul 1999	Dec 2024	Wind
Sheboygan Falls	Wisconsin Power & Light Co	Sheboygan, WI	452 GWh	May 2005	Dec 2025	Natural Gas
Shelby Energy County	Shelby County Energy Center, LLC	Neoga, IL	184 GWh	May 2000	Dec 2025	Natural Gas
Shell Chemical	Shell Chemical LP - Geismar	Geismar, LA	585 GWh	Jul 2002	Dec 2025	Natural Gas
Shenandoah	MidAmerican Energy Co	Shenandoah, IA	323 MWh	Mar 2000	Dec 2025	Distillate Fuel Oil
Shenandoah Hills Wind Farm	MidAmerican Energy Co	Blanchard, IA	336 GWh	Nov 2025	May 2026	Wind
Sherburne Community Solar	Onsite Partners, LLC	Clear Lake, MN	8 GWh	Feb 2018	May 2026	Solar
Sherburne Community Solar One LLC CSG	Madison Energy Holdings LLC	Saint Cloud, MN	2 GWh	Nov 2019	Dec 2025	Solar
Sherburne County	Northern States Power Co - Minnesota	Becker, MN	6 TWh	Mar 1976	May 2026	Subbituminous Coal : 99.8%
Sherburne North Project CSG	Madison Energy Investments LLC	St. Cloud, MN	8 GWh	Jun 2018	Sep 2025	Solar
Sherburne Solar Holdings, LLC	REA Investments, LLC	Princeton, MN	4 GWh	Feb 2021	Dec 2025	Solar
Sherco Solar I	Northern States Power Co - Minnesota	Clear Lake, MN	421 GWh	Sep 2024	May 2026	Solar
Sherco Solar II	Northern States Power Co - Minnesota	Becker, MN	247 GWh	Aug 2025	May 2026	Solar
Sheridan School Corporation Solar	Johnson Melloh Solutions	Sheridan, IN	2 GWh	May 2016	Dec 2025	Solar
Shipsterns Solar, LLC	Shipsterns Solar, LLC	Albion, MI	41 GWh	Sep 2023	Dec 2025	Solar
Shirley Wind	Duke Energy Renewables Services	Denmark, WI	57 GWh	Oct 2010	Dec 2025	Wind
Sibley No Two	City of Sibley - (IA)	Sibley, IA	37 MWh	Nov 1987	Dec 2025	Natural Gas : 90.9% Distillate Fuel Oil : 9.1%
Sibley One	City of Sibley - (IA)	Sibley, IA	174 MWh	Aug 1971	Dec 2025	Distillate Fuel Oil : 65.0% Natural Gas : 35.0%
Sidney A Murray Jr Hydroelectric	First National Bank-Commerce	Vidalia, LA	989 GWh	Apr 1990	Dec 2025	Water
Siems Solar Project CSG	Siems Community Solar LLC	Mazeppa, MN	2 GWh	Jul 2020	Dec 2025	Solar
Sigel Wind Park	DTE Electric Company	Harbor Beach, MI	246 GWh	Nov 2012	May 2026	Wind
Silver Creek	Cooperative Energy	Prentiss, MS	282 GWh	May 2003	Dec 2025	Natural Gas
Silver Lake Garden	Excelsior Energy Capital	Waseca, MN	2 GWh	Dec 2020	Dec 2025	Solar
Silver Lake Solar WI, LLC	Wisconsin Electric Power Co	Salem, WI	9 GWh	Nov 2023	Dec 2025	Solar
Sioux	Union Electric Co - (MO)	West Alton, MO	4 TWh	Apr 1967	May 2026	Subbituminous Coal : 78.0% Bituminous Coal : 21.9%
SIUC	Southern Illinois University Carbondale	Carbondale, IL	9 GWh	May 1998	May 2026	Bituminous Coal
Skalbeck Solar	Cascade Solar LLC	Sacred Heart, MN	2 GWh	Oct 2022	Dec 2025	Solar
Sky Volt	Sky Volt, LLC	Greenfield, IA	5 GWh	Jul 2012	Dec 2025	Wind
Slayton Solar	Ecos Energy LLC	Slayton, MN	2 GWh	Dec 2012	Dec 2025	Solar
Sleepy Eye	Sleepy Eye Public Utility Comm	Sleepy Eye, MN	131 MWh	Jun 1995	Dec 2024	Distillate Fuel Oil
Smithland Hydroelectric Plant	American Mun Power-Ohio, Inc	Smithland, KY	421 GWh	Jun 2017	May 2026	Water
SMMPA Methane Energy Facility	Southern Minnesota Mun P Agny	Mora, MN	3 GWh	Mar 2012	Dec 2025	Landfill Gas
Sobania Community Solar LLC	Madison Energy Holdings LLC	Clear Lake, MN	2 GWh	Aug 2020	Dec 2025	Solar
Solar Star Urbana Landfill Central	Solar Star Urbana Landfill Central, LLC	Urbana, IL	4 GWh	Oct 2021	Dec 2025	Solar
Solar Star Urbana Landfill East	Solar Star Urbana Landfill East, LLC	Urbana, IL	4 GWh	Sep 2021	Dec 2025	Solar
SolarClub 03	Nautilus Solar Solutions	Starbuck, MN	2 GWh	Aug 2023	Dec 2025	Solar
SolarClub 10 LLC	Nautilus Solar Solutions	Monticello, MN	2 GWh	Nov 2020	Dec 2025	Solar
SolarClub 15 LLC	Nautilus Solar Solutions	Clear Lake, MN	2 GWh	Nov 2020	Dec 2025	Solar
SolarClub 20 LLC	Nautilus Solar Solutions	Wabasha, MN	2 GWh	Nov 2020	Dec 2025	Solar
SolarClub 23 LLC	Nautilus Solar Solutions	La Crescent, MN	2 GWh	Nov 2020	Dec 2025	Solar
SolarClub 28 LLC	Nautilus Solar Solutions	Gaylord, MN	2 GWh	Nov 2020	Dec 2025	Solar
SolarClub 30 (CSG)	Nautilus Solar Solutions	Eden Valley, MN	2 GWh	Dec 2023	Dec 2025	Solar
SolarClub 35 LLC	Nautilus Solar Solutions	Mankato, MN	2 GWh	Nov 2020	Dec 2025	Solar
Soliloquoy Ridge LLC	CHI Operations Inc	Lake Benton, MN	5 GWh	Dec 2000	Dec 2024	Wind
Solway CT	Otter Tail Power Co	Solway, MN	143 GWh	Apr 2003	Dec 2025	Natural Gas : 99.5%
South Belleville Solar, LLC	Dimension Energy LLC	Smithton Township, IL	385 MWh	Oct 2025	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