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%

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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
Rantoul	Village of Rantoul - (IL)	Rantoul, IL	313 MWh	Dec 1950	Jul 2026	Distillate Fuel Oil
Franklin Heating Station	Franklin Heating Station	Rochester, MN	63 GWh	Dec 1950	Jul 2026	Natural Gas : 81.5% Purchased Steam : 17.2% Distillate Fuel Oil : 1.3%
Elk River	Great River Energy	Elk River, MN	145 GWh	Dec 1950	Jul 2026	Natural Gas : 90.1% Distillate Fuel Oil : 9.9%
Summit Lake	Central Iowa Power Cooperative	Creston, IA	109 GWh	Feb 1951	Dec 2025	Natural Gas : 99.8%
Farmer City	City of Farmer City - (IL)	Farmer City, IL	59 MWh	Mar 1951	Dec 2025	Distillate Fuel Oil
Cascade	Cascade Municipal Utilities - (IA)	Cascade, IA	31 MWh	Mar 1951	Dec 2025	Distillate Fuel Oil
Ogden	City of Ogden - (IA)	Ogden, IA	73 MWh	Jun 1951	Dec 2025	Distillate Fuel Oil
Edgewater	Wisconsin Power & Light Co	Sheboygan, WI	2 TWh	Jun 1951	Jul 2026	Subbituminous Coal : 99.9%
Rockford	City of Rockford- (IA)	Rockford, IA	6 MWh	Jul 1951	Dec 2025	Distillate Fuel Oil
Louisiana 1	Entergy Louisiana LLC	Baton Rouge, LA	3 TWh	Sep 1951	Jul 2026	Natural Gas : 71.4% Other Gas : 28.6%
Eagle Valley (IN)	AES Indiana	Martinsville, IN	5 TWh	Nov 1951	Jul 2026	Natural Gas
Alpena Cement Plant	Amrize Cement Inc.	Alpena, MI	212 GWh	Dec 1951	Jul 2026	Petroleum Coke : 86.9% Natural Gas : 13.1%
Spring Valley	Spring Valley Pub Utils Comm	Spring Valley, MN	227 MWh	Dec 1951	Dec 2025	Distillate Fuel Oil : 82.2% Natural Gas : 17.8%
Fennimore	City of Fennimore - (WI)	Fennimore, WI	75 MWh	Jan 1952	Dec 2025	Distillate Fuel Oil
Lake Crystal	City of Lake Crystal - (MN)	Lake Crystal, MN	21 MWh	Apr 1952	Dec 2025	Distillate Fuel Oil
Moose Lake	Moose Lake Water & Light Comm	Moose Lake, MN	128 MWh	Oct 1952	Dec 2025	Distillate Fuel Oil : 92.0% Natural Gas : 8.0%
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%
Cargill Corn Milling Division	Cargill Inc North America Sweetners	Eddyville, IA	112 GWh	Nov 1952	Dec 2025	Natural Gas
Michigamme Falls	Wisconsin Electric Power Co	Crystal Falls, MI	29 GWh	May 1953	Dec 2025	Water
Syl Laskin	ALLETE, Inc.	Hoyt Lakes, MN	196 GWh	May 1953	Dec 2025	Natural Gas
Teche	Cleco Power LLC	Baldwin, LA	6 GWh	Jun 1953	Sep 2025	Natural Gas
Princeton (IL)	City of Princeton - (IL)	Princeton, IL	813 MWh	Jun 1953	Dec 2025	Natural Gas : 99.8%
St Clair	DTE Electric Company	East China Twp, MI	7 GWh	Jul 1953	Jul 2026	Distillate Fuel Oil : 51.3% Natural Gas : 48.7%
Hemlock Falls	Wisconsin Electric Power Co	Crystal Falls, MI	9 GWh	Jul 1953	Oct 2025	Water
Princeton (MN)	Princeton Public Utils Comm	Princeton, MN	108 MWh	Aug 1953	Dec 2025	Distillate Fuel Oil
Wabash Valley Power IGCC	Wabash Valley Power Assn, Inc	Terre Haute, IN	477 GWh	Nov 1953	Jul 2026	Natural Gas
Breese	City of Breese - (IL)	Breese, IL	539 MWh	Nov 1953	Dec 2025	Distillate Fuel Oil
Consumer Operations LLC	Georgia-Pacific Consumer Oper. Green Bay LLC	Green Bay, WI	242 GWh	Dec 1953	Jul 2026	Natural Gas
Walter Scott Jr Energy Center	MidAmerican Energy Co	Council Bluffs, IA	7 TWh	Feb 1954	Jul 2026	Subbituminous Coal : 99.3% Distillate Fuel Oil : 0.6%
Mountain Lake	City of Mountain Lake - (MN)	Mountain Lake, MN	3 GWh	Apr 1954	Dec 2025	Wind : 96.5% Distillate Fuel Oil : 1.9% Natural Gas : 1.6%
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%
American Crystal Sugar Crookston	American Crystal Sugar Co	Crookston, MN	41 GWh	Aug 1954	Dec 2025	Subbituminous Coal
Black Dog	Northern States Power Co - Minnesota	Burnsville, MN	870 GWh	Sep 1954	Dec 2025	Natural Gas
Hennepin Island	Northern States Power Co - Minnesota	Minneapolis, MN	54 GWh	Sep 1954	Dec 2025	Water
R M Heskett	Montana-Dakota Utilities Co	Mandan, ND	64 GWh	Oct 1954	Jul 2026	Natural Gas
West Bend	City of West Bend - (IA)	West Bent, IA	68 MWh	Nov 1954	Dec 2025	Distillate Fuel Oil
Weston	Wisconsin Public Service Corp	Rothschild, WI	4 TWh	Nov 1954	Jul 2026	Subbituminous Coal : 99.3% Natural Gas : 0.7%
Janesville	City of Janesville - (MN)	Janesville, MN	35 MWh	Apr 1955	Dec 2025	Distillate Fuel Oil : 97.5% Natural Gas : 2.5%
Manitowoc	Manitowoc Public Utilities	Manitowoc, WI	185 GWh	May 1955	Jul 2026	Wood/Wood Waste Solids : 80.7% Petroleum Coke : 9.9% Bituminous Coal : 9.1%
Blakely Mountain	USCE -Vickburg District	Royal, AR	216 GWh	Aug 1955	Dec 2025	Water
Dafter	Cloverland Electric Co-op	Dafter, MI	3 GWh	Oct 1955	Dec 2025	Distillate Fuel Oil
Tipton	City of Tipton - (IA)	Tipton, IA	266 MWh	Oct 1955	Dec 2025	Distillate Fuel Oil
Nine Mile Point	Entergy Louisiana LLC	Westwego, LA	8 TWh	Oct 1955	Jul 2026	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Lake Mills	City of Lake Mills - (IA)	Lake Mills, IA	99 MWh	Dec 1955	Dec 2025	Distillate Fuel Oil
Winterset	City of Winterset - (IA)	Winterset, IA	33 MWh	Jun 1956	Dec 2025	Distillate Fuel Oil : 57.8% Natural Gas : 42.2%
Sumner	City of Sumner - (IA)	Sumner, IA	55 MWh	Jul 1956	Dec 2025	Distillate Fuel Oil
New Ulm	New Ulm Public Utilities Comm	New Ulm, MN	2 GWh	Dec 1956	Dec 2025	Natural Gas : 59.1% Distillate Fuel Oil : 40.9%
Columbia (MO)	City of Columbia - (MO)	Columbia, MO	27 GWh	Dec 1956	Dec 2025	Landfill Gas : 69.6% Natural Gas : 30.4%
Zeeland	City of Zeeland - (MI)	Zeeland, MI	600 MWh	Dec 1956	Dec 2025	Natural Gas : 89.2% Distillate Fuel Oil : 10.8%
Glencoe	Glencoe Light & Power Comm	Glencoe, MN	146 MWh	May 1957	Dec 2025	Distillate Fuel Oil : 99.7%
Blount Street	Madison Gas & Electric Co	Madison, WI	59 GWh	May 1957	Dec 2025	Natural Gas
Motiva Enterprises Port Arthur Refinery	Motiva Enterprises LLC	Port Arthur, TX	2 TWh	May 1957	Jul 2026	Natural Gas : 90.7% Other Gas : 9.3%
Geneseo	City of Geneseo - (IL)	Geneseo, IL	8 GWh	Jun 1957	Jul 2026	Wind : 71.7% Solar : 21.5% Distillate Fuel Oil : 6.8%
Graettinger	City of Graettinger - (IA)	Graettinger, IA	49 MWh	Jul 1957	Dec 2025	Distillate Fuel Oil
Mora	City of Mora - (MN)	Mora, MN	1 GWh	Aug 1957	Dec 2025	Natural Gas : 71.2% Distillate Fuel Oil : 28.8%
Coggon	Coggon Municipal Light Plant - (IA)	Coggon, IA	38 MWh	Sep 1957	Dec 2025	Distillate Fuel Oil
Hutchinson Plant #1	Hutchinson Utilities Comm	Hutchinson, MN	42 GWh	Dec 1957	Dec 2025	Natural Gas
Menomonie	Northern States Power Co - Minnesota	Menomonie, WI	23 GWh	Dec 1957	Dec 2025	Water
Atlantic Alumina, Gramercy Operations	Atalco Gramercy LLC	Gramercy, LA	181 GWh	Jan 1958	Dec 2025	Natural Gas
Allen S King	Northern States Power Co - Minnesota	Oak Park Heights, MN	861 GWh	Feb 1958	Jul 2026	Subbituminous Coal : 99.5%
Muscatine Plant #1	Board of Water Electric & Communications	Muscatine, IA	711 GWh	Mar 1958	Jul 2026	Subbituminous Coal : 99.8%
Harding Street	AES Indiana	Indianapolis, IN	4 TWh	May 1958	Jul 2026	Natural Gas
LaO Energy Systems	Dow Chemical Co	Plaquemine, LA	1 TWh	May 1958	Dec 2024	Natural Gas : 84.1% Other Gas : 15.9%
Clay Boswell	ALLETE, Inc.	Cohasset, MN	6 TWh	Jun 1958	Jul 2026	Subbituminous Coal : 99.8%
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%
Lewis & Clark	Montana-Dakota Utilities Co	Richland, MT	12 GWh	Sep 1958	Jul 2026	Natural Gas
Prairie Creek	Interstate Power and Light Co	Cedar Rapids, IA	52 GWh	Sep 1958	Jul 2026	Subbituminous Coal : 59.8% Natural Gas : 40.2%
Vestaburg	Wolverine Power Supply Coop	Vestaburg, MI	4 GWh	Dec 1958	Dec 2025	Natural Gas
R S Nelson	Entergy Louisiana LLC	Westlake, LA	2 TWh	Jan 1959	Jul 2026	Subbituminous Coal : 99.7%
Red Bud	City of Red Bud - (IL)	Red Bud, IL	262 MWh	Feb 1959	Dec 2025	Distillate Fuel Oil
John H Warden	L'Anse Warden Electric Company LLC	L'Anse, MI	81 GWh	Jul 1959	Oct 2025	Wood/Wood Waste Solids : 92.7% Tire-derived Fuels : 7.1%
Dan E Karn	Consumers Energy Co - (MI)	Essexville, MI	73 GWh	Oct 1959	Jul 2026	Natural Gas : 92.1% Residual Fuel Oil : 7.9%
South Oak Creek	Wisconsin Electric Power Co	Oak Creek, WI	2 TWh	Nov 1959	Jul 2026	Subbituminous Coal : 99.5%
Alverno Hydro Plant	Energen Renewables, LLC	Cheboygan, MI	3 GWh	Dec 1959	Dec 2025	Water
Warrick	AGC Division of APGI Inc	Newburgh, IN	3 TWh	Mar 1960	Jul 2026	Bituminous Coal : 97.9% Natural Gas : 2.1%
Manistique	Cloverland Electric Co-op	Manistique, MI	1 GWh	Jun 1960	Dec 2025	Distillate Fuel Oil
Iowa State University	Iowa State University	Ames, IA	72 GWh	Sep 1960	Jul 2026	Natural Gas : 97.7% Distillate Fuel Oil : 2.3%
Blue Earth	Blue Earth Light & Water	Blue Earth, MN	81 MWh	Oct 1960	Dec 2025	Distillate Fuel Oil
Little Gypsy	Entergy Louisiana LLC	La Place, LA	1 TWh	Feb 1961	Jul 2026	Natural Gas
Coughlin Power Station	Cleco Power LLC	St Landry, LA	4 TWh	Mar 1961	Jul 2026	Natural Gas
MU Combined Heat and Power Plant	Curators of the University of Missouri	Columbia, MO	197 GWh	Jun 1961	Jul 2026	Natural Gas : 77.6% Wood/Wood Waste Solids : 20.6% Bituminous Coal : 1.8%
L L Wilkins	Clarksdale Public Utilities	Clarksdale, MS	166 MWh	Sep 1961	Aug 2025	Natural Gas : 71.4% Distillate Fuel Oil : 28.6%
Sabine	Entergy Texas Inc.	Orange, TX	3 TWh	Dec 1961	Jul 2026	Natural Gas
J H Campbell	Consumers Energy Co - (MI)	West Olive, MI	5 TWh	Sep 1962	Jul 2026	Subbituminous Coal : 99.6%
Traer Main	City of Traer - (IA)	Traer, IA	65 MWh	Dec 1962	Dec 2025	Distillate Fuel Oil : 98.5% Natural Gas : 1.5%
Marion	Southern Illinois Power Coop	Marion, IL	796 GWh	May 1963	Jul 2026	Bituminous Coal : 86.3% Natural Gas : 13.1% Distillate Fuel Oil : 0.6%
Litchfield	Litchfield Public Utilities	Litchfield, MN	861 MWh	Aug 1963	Dec 2025	Distillate Fuel Oil : 54.6% Natural Gas : 45.4%
Streeter Station	Cedar Falls Utilities	Cedar Falls, IA	14 GWh	Aug 1963	Dec 2025	Natural Gas : 96.4% Bituminous Coal : 3.6%
Osage (IA)	City of Osage - (IA)	Osage, IA	5 GWh	Aug 1963	Dec 2025	Wind : 81.8% Solar : 18.2%
Grundy Center City Light Plant	Grundy Center Mun Light & Power	Grundy Center, IA	109 MWh	Oct 1963	Dec 2025	Distillate Fuel Oil
Grantsburg Diesel	Northwestern Wisconsin Elec Co	Grantsburg, WI	26 MWh	Nov 1963	Dec 2025	Distillate Fuel Oil
Plant 31 Paper Mill	Graphic Packaging International	West Monroe, LA	515 GWh	Dec 1963	Dec 2025	Natural Gas : 62.4% Black Liquor : 25.3% Wood/Wood Waste Solids : 12.3%
Story City	City of Story City - (IA)	Story City, IA	315 MWh	Dec 1963	Dec 2025	Distillate Fuel Oil : 87.0% Natural Gas : 13.0%
George Neal North	MidAmerican Energy Co	Sergeant Bluff, IA	2 TWh	Apr 1964	Jul 2026	Subbituminous Coal : 98.2% Natural Gas : 1.8%
Carlyle	City of Carlyle - (IL)	Carlyle, IL	208 MWh	Jul 1964	Dec 2025	Distillate Fuel Oil
Nine Springs	Madison Gas & Electric Co	Madison, WI	89 MWh	Nov 1964	Dec 2025	Natural Gas
Hibbing	Hibbing Public Utilities Comm	Hibbing, MN	40 GWh	Mar 1965	Dec 2025	Natural Gas : 52.2% Wood/Wood Waste Solids : 46.4% Bituminous Coal : 1.4%
D G Hunter	City of Alexandria - (LA)	Alexandria, LA	91 GWh	Apr 1965	Dec 2025	Natural Gas
American Crystal Sugar Drayton	American Crystal Sugar Co	Drayton, ND	43 GWh	Aug 1965	Dec 2025	Subbituminous Coal
Sam Rayburn Dam	USACE-Fort Worth District	Jasper, TX	208 GWh	Aug 1965	Dec 2025	Water

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