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%

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
Worthington	City of Worthington - (MN)	Worthington, MN	6 GWh	Jan 2002	Dec 2025	Wind : 99.3% Distillate Fuel Oil : 0.7%
Cambridge CT Hybrid	Great River Energy	Cambridge, MN	101 GWh	Apr 1978	Dec 2025	Natural Gas : 91.7% Distillate Fuel Oil : 8.3%
Maple Lake	Great River Energy	Maple Lake, MN	321 MWh	Apr 1978	Dec 2025	Distillate Fuel Oil
Benndale	Cooperative Energy	Benndale, MS	49 GWh	Sep 1969	Dec 2025	Natural Gas
Fairgrounds	Union Electric Co - (MO)	Jefferson City, MO	21 MWh	Jul 1974	Dec 2025	Distillate Fuel Oil
Osage Dam	Union Electric Co - (MO)	Eldon, MO	499 GWh	Sep 1931	Dec 2025	Water
Columbia (MO)	City of Columbia - (MO)	Columbia, MO	27 GWh	Dec 1956	Dec 2025	Landfill Gas : 69.6% Natural Gas : 30.4%
Jackson (MO)	City of Jackson - (MO)	Jackson, MO	202 MWh	Dec 1935	Dec 2025	Distillate Fuel Oil : 67.1% Natural Gas : 32.9%
Glendive GT	Montana-Dakota Utilities Co	Glendive, MT	16 GWh	May 1979	Dec 2025	Natural Gas : 98.8% Distillate Fuel Oil : 1.2%
Miles City GT	Montana-Dakota Utilities Co	Miles City, MT	2 GWh	Apr 1972	Dec 2025	Natural Gas : 99.7%
Jamestown	Otter Tail Power Co	Jamestown, ND	1 GWh	Apr 1976	Dec 2025	Distillate Fuel Oil
Lake Preston	Otter Tail Power Co	Lake Preston, SD	135 MWh	May 1978	Dec 2025	Distillate Fuel Oil
Biron	Consolidated Water Power Co	Biron, WI	30 GWh	Dec 1895	Dec 2025	Water
Du Bay	Consolidated Water Power Co	Eau Pleine, WI	36 GWh	Dec 1941	Dec 2025	Water
Stevens Point	Consolidated Water Power Co	Stevens Point, WI	26 GWh	Dec 1917	Dec 2025	Water
Wisconsin Rapids	Consolidated Water Power Co	Wisconsin Rapids, WI	46 GWh	Dec 1902	Dec 2025	Water
Whiting	Consolidated Water Power Co	Whiting, WI	16 GWh	Dec 1890	Dec 2025	Water
Bay Front	Northern States Power Co - Minnesota	Ashland, WI	177 GWh	Dec 1948	Dec 2025	Wood/Wood Waste Solids : 95.1% Tire-derived Fuels : 4.2% Natural Gas : 0.7%
Big Falls	Northern States Power Co - Minnesota	Glen Fora, WI	27 GWh	Dec 1921	Dec 2025	Water
Ladysmith Dam	Northern States Power Co - Minnesota	Ladysmith, WI	10 GWh	Dec 1939	Dec 2025	Water
Thornapple	Northern States Power Co - Minnesota	Bruce, WI	7 GWh	Dec 1926	Dec 2025	Water
White River (WI)	Northern States Power Co - Minnesota	Ashland, WI	3 GWh	Dec 1906	Dec 2025	Water
Blount Street	Madison Gas & Electric Co	Madison, WI	59 GWh	May 1957	Dec 2025	Natural Gas
Sycamore (WI)	Madison Gas & Electric Co	Madison, WI	28 MWh	Nov 1967	Dec 2025	Natural Gas
Cedar Falls (WI)	Northern States Power Co - Minnesota	Menomonie, WI	31 GWh	Dec 1909	Dec 2025	Water
Chippewa Falls	Northern States Power Co - Minnesota	Chippewa Falls, WI	56 GWh	Dec 1927	Dec 2025	Water
Dells	Northern States Power Co - Minnesota	Eau Claire, WI	37 GWh	Dec 1922	Dec 2025	Water
Holcombe	Northern States Power Co - Minnesota	Holcombe, WI	81 GWh	Dec 1949	Dec 2025	Water
Jim Falls	Northern States Power Co - Minnesota	Jim Falls, WI	105 GWh	Jun 1988	Dec 2025	Water
Menomonie	Northern States Power Co - Minnesota	Menomonie, WI	23 GWh	Dec 1957	Dec 2025	Water
St Croix Falls	Northern States Power Co - Minnesota	St Croix Falls, WI	80 GWh	Dec 1909	Dec 2025	Water
Trego	Northern States Power Co - Minnesota	Hayward, WI	5 GWh	Dec 1926	Dec 2025	Water
Wissota	Northern States Power Co - Minnesota	Chippewa Falls, WI	118 GWh	Dec 1916	Dec 2025	Water
Clam River Dam	Zero6 Energy Hydro	Danbury, WI	5 GWh	Mar 1942	Dec 2025	Water
Danbury Dam	Zero6 Energy Hydro	Danbury, WI	2 GWh	Dec 1920	Dec 2025	Water
Grantsburg Diesel	Northwestern Wisconsin Elec Co	Grantsburg, WI	26 MWh	Nov 1963	Dec 2025	Distillate Fuel Oil
Appleton	Wisconsin Electric Power Co	Appleton, WI	12 GWh	Jul 1916	Dec 2025	Water
Oconto Falls Upper	Eagle Creek Renewable Energy, LLC	Oconto Falls, WI	12 GWh	Dec 1917	Dec 2025	Water
Pine	Wisconsin Electric Power Co	Florence, WI	11 GWh	May 1922	Dec 2025	Water
Kilbourn	Wisconsin Power & Light Co	Wisconsin Dells, WI	49 GWh	Jun 1926	Dec 2025	Water
Prairie Du Sac	Wisconsin Power & Light Co	Prairie du Sac, WI	153 GWh	Sep 1915	Dec 2025	Water
Alexander	Wisconsin Public Service Corp	Merrill, WI	14 GWh	Dec 1924	Dec 2025	Water
Caldron Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	11 GWh	Oct 1924	Dec 2025	Water
Grandfather Falls	Wisconsin Public Service Corp	Irma, WI	79 GWh	Nov 1938	Dec 2025	Water
Hat Rapids	Wisconsin Public Service Corp	Rhinelander, WI	7 GWh	May 1923	Dec 2025	Water
High Falls (WI)	Wisconsin Public Service Corp	Town of Stephenson, WI	16 GWh	Jul 1910	Dec 2025	Water
Johnson Falls	Wisconsin Public Service Corp	Town of Stephenson, WI	11 GWh	Jun 1923	Dec 2025	Water
Merrill	Wisconsin Public Service Corp	Merrill, WI	4 GWh	Feb 1917	Dec 2025	Water
Potato Rapids	Wisconsin Public Service Corp	Town of Porterfield, WI	4 GWh	Apr 1921	Dec 2025	Water
Sandstone Rapids	Wisconsin Public Service Corp	Town of Stephenson, WI	10 GWh	Dec 1924	Dec 2025	Water
Tomahawk	Wisconsin Public Service Corp	Tomahawk, WI	11 GWh	Dec 1937	Dec 2025	Water
West Marinette	Wisconsin Public Service Corp	Peshtigo, WI	90 GWh	May 1971	Dec 2025	Natural Gas
Wausau	Wisconsin Public Service Corp	Wausau, WI	24 GWh	Feb 1921	Dec 2025	Water
Castle Rock	Wisconsin River Power Company	Adams, WI	83 GWh	Jul 1950	Dec 2025	Water
Petenwell	Wisconsin River Power Company	Necedah, WI	97 GWh	Jul 1949	Dec 2025	Water
Arcadia Electric	City of Arcadia - (WI)	Arcadia, WI	253 MWh	Dec 1929	Dec 2025	Distillate Fuel Oil : 70.5% Natural Gas : 29.5%
Barron	City of Barron - (WI)	Barron, WI	382 MWh	Jul 1923	Dec 2025	Water
Cashton	Village of Cashton - (WI)	Cashton, WI	10 MWh	Jul 1932	Dec 2025	Distillate Fuel Oil : 98.3% Natural Gas : 1.7%
Cumberland (WI)	City of Cumberland - (WI)	Cumberland, WI	269 MWh	Jul 1939	Dec 2025	Distillate Fuel Oil : 62.7% Natural Gas : 37.3%
Elroy	City of Elroy - (WI)	Elroy, WI	48 MWh	Apr 1973	Dec 2025	Distillate Fuel Oil
Fennimore	City of Fennimore - (WI)	Fennimore, WI	75 MWh	Jan 1952	Dec 2025	Distillate Fuel Oil
Kaukauna Gas Turbine	City of Kaukauna (WI)	Kaukauna, WI	2 GWh	Apr 1969	Dec 2025	Natural Gas
Little Chute	City of Kaukauna (WI)	Combined Locks, WI	22 GWh	May 1948	Dec 2025	Water
Rapide Croche	City of Kaukauna (WI)	Kaukana, WI	17 GWh	Dec 1925	Dec 2025	Water
La Farge	La Farge Municipal Electric Co - (WI)	La Farge, WI	12 MWh	Sep 1990	Dec 2025	Distillate Fuel Oil
New Lisbon	City of New Lisbon (WI)	New Lisbon, WI	55 MWh	Dec 1965	Dec 2025	Distillate Fuel Oil
Viola	Village of Viola - (WI)	Viola, WI	15 MWh	Dec 2001	Dec 2025	Distillate Fuel Oil
Stiles	Oconto Electric Cooperative	Oconto Falls, WI	5 GWh	Feb 1949	Dec 2025	Water
Washington Island	Washington Island El Coop, Inc	Washington Island, WI	5 MWh	Nov 1945	Dec 2025	Distillate Fuel Oil
Combined Locks	City of Kaukauna (WI)	Combined Locks, WI	43 GWh	Jan 1988	Dec 2025	Water
Cascade Creek	Rochester Public Utilities	Rochester, MN	33 GWh	May 1975	Dec 2025	Natural Gas : 98.4% Distillate Fuel Oil : 1.6%
Electrifarm	MidAmerican Energy Co	Waterloo, IA	17 GWh	Apr 1975	Dec 2025	Natural Gas
Cornell	Northern States Power Co - Minnesota	Chippewa Falls, WI	70 GWh	Jun 1976	Dec 2025	Water
Durant	City of Durant - (IA)	Durant, IA	29 MWh	Jun 1970	Dec 2025	Distillate Fuel Oil
Apple River	Northern States Power Co - Minnesota	Somerset, WI	13 GWh	Dec 1900	Dec 2025	Water
Pearl Station	Prairie Power, Inc	Pearl, IL	64 MWh	May 1973	Dec 2025	Distillate Fuel Oil
Germantown	Wisconsin Electric Power Co	Germantown, WI	33 GWh	Jun 1978	Dec 2025	Natural Gas : 83.1% Distillate Fuel Oil : 16.9%
Hutchinson Plant #2	Hutchinson Utilities Comm	Hutchinson, MN	28 GWh	Oct 1994	Dec 2025	Natural Gas
Detour	Cloverland Electric Co-op	Detour, MI	2 GWh	Sep 1973	Dec 2025	Distillate Fuel Oil
Sam Rayburn Dam	USACE-Fort Worth District	Jasper, TX	208 GWh	Aug 1965	Dec 2025	Water
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%
D G Hunter	City of Alexandria - (LA)	Alexandria, LA	91 GWh	Apr 1965	Dec 2025	Natural Gas
Mexico	Union Electric Co - (MO)	Mexico, MO	2 GWh	Aug 1978	Dec 2025	Distillate Fuel Oil
Moberly	Union Electric Co - (MO)	Moberly, MO	257 MWh	Jul 1978	Dec 2025	Distillate Fuel Oil
Moreau	Union Electric Co - (MO)	Moreau, MO	2 GWh	Jul 1978	Dec 2025	Distillate Fuel Oil
Rock Lake CT	Great River Energy	Pine City, MN	449 MWh	Mar 1978	Dec 2025	Distillate Fuel Oil
St Bonifacius	Great River Energy	St. Bonifacius, MN	3 GWh	May 1978	Dec 2025	Distillate Fuel Oil
Sibley No Two	City of Sibley - (IA)	Sibley, IA	37 MWh	Nov 1987	Dec 2025	Natural Gas : 90.9% Distillate Fuel Oil : 9.1%
Hoist	Upper Peninsula Power Company	Negaunee, MI	14 GWh	Jan 1988	Dec 2025	Water
McClure Dam	Upper Peninsula Power Company	Marquette, MI	26 GWh	Jan 1988	Dec 2025	Water
Cataract (MI)	Cataract Hydro, LLC	Gwinn, MI	5 GWh	Jan 1988	Dec 2025	Water
Whillock	Arkansas Electric Coop Corp	Morrilton, AR	131 GWh	Sep 1993	Dec 2025	Water
Pleasant Hill	MidAmerican Energy Co	Pleasant Hill, IA	49 GWh	May 1990	Dec 2025	Natural Gas
Lime Creek	Interstate Power and Light Co	Mason City, IA	1 GWh	Apr 1991	Dec 2025	Distillate Fuel Oil
Concord	Wisconsin Electric Power Co	Watertown, WI	203 GWh	Jun 1993	Dec 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Murray	City of North Little Rock - (AR)	North Little Rock, AR	116 GWh	Sep 1988	Dec 2025	Water
South Fond Du Lac	Wisconsin Power & Light Co	Fond du Lac, WI	20 GWh	Apr 1993	Dec 2025	Natural Gas : 99.8%
Angus Anson	Northern States Power Co - Minnesota	Sioux Falls, SD	239 GWh	Jul 1994	Dec 2025	Natural Gas : 99.9%
Dam 2	Arkansas Electric Coop Corp	Dumas, AR	385 GWh	May 1999	Dec 2025	Water
491 E 48th Street	City of Holland - (MI)	Holland, MI	142 GWh	Apr 1992	Dec 2025	Natural Gas

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