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
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Park Mill | Eagle Creek Renewable Energy, LLC | Marinette, WI | 4 GWh | Dec 1919 | Dec 2025 | Water |
| Packaging of America Tomahawk Mill | PCA-Tomahawk Mill | Tomahawk, WI | 113 GWh | Dec 1919 | Dec 2025 | Wood/Wood Waste Solids : 35.4% Natural Gas : 35.0% Black Liquor : 18.0% Water : 11.0% Other Biomass Solids : 0.6% |
| Brule | Wisconsin Electric Power Co | Florence, WI | 12 GWh | Dec 1918 | Dec 2025 | Water |
| James R Smith | City of Marquette - (MI) | Marquette, MI | 14 GWh | Dec 1918 | Dec 2025 | Water |
| St Louis | City of St Louis - (MI) | St. Louis, MI | 8 MWh | Dec 1918 | Dec 2025 | Distillate Fuel Oil |
| Grand Rapids | Wisconsin Public Service Corp | Ingalls, MI | 35 GWh | May 1918 | Dec 2025 | Water |
| C W Tippy | Consumers Energy Co - (MI) | Wellston, MI | 56 GWh | Dec 1917 | Dec 2025 | Water |
| Foote | Consumers Energy Co - (MI) | Oscoda, MI | 28 GWh | Dec 1917 | Dec 2025 | Water |
| Stevens Point | Consolidated Water Power Co | Stevens Point, WI | 26 GWh | Dec 1917 | Dec 2025 | Water |
| Oconto Falls Upper | Eagle Creek Renewable Energy, LLC | Oconto Falls, WI | 12 GWh | Dec 1917 | Dec 2025 | Water |
| Rhinelander Mill | Ahlstrom-Munksjo | Rhinelander, WI | 7 GWh | Nov 1917 | May 2026 | Water |
| Merrill | Wisconsin Public Service Corp | Merrill, WI | 4 GWh | Feb 1917 | Dec 2025 | Water |
| Superior Falls | Northern States Power Co - Minnesota | Ironwood, MI | 8 GWh | Dec 1916 | Dec 2025 | Water |
| Pillager | ALLETE, Inc. | Pillager, MN | 7 GWh | Dec 1916 | Dec 2025 | Water |
| Wissota | Northern States Power Co - Minnesota | Chippewa Falls, WI | 118 GWh | Dec 1916 | Dec 2025 | Water |
| Brainerd Public Utilities | Brainerd Public Utilities | Brainerd, MN | 13 GWh | Dec 1916 | Dec 2025 | Water |
| Appleton | Wisconsin Electric Power Co | Appleton, WI | 12 GWh | Jul 1916 | Dec 2025 | Water |
| Mosinee Mill | Ahlstrom-Munksjo NA Specialty Solutions, LLC | Mosinee, WI | 101 GWh | Jun 1916 | May 2026 | Black Liquor : 43.1% Natural Gas : 22.1% Water : 15.5% Bituminous Coal : 12.0% Wood/Wood Waste Solids : 5.4% Sludge Waste : 1.4% |
| Mio | Consumers Energy Co - (MI) | Mio, MI | 14 GWh | Dec 1915 | Dec 2025 | Water |
| Prairie Du Sac | Wisconsin Power & Light Co | Prairie du Sac, WI | 153 GWh | Sep 1915 | Dec 2025 | Water |
| Hoot Lake | Otter Tail Power Co | Fergus Falls, MN | 4 GWh | Aug 1914 | Dec 2025 | Water |
| Crystal Falls | City of Crystal Falls - (MI) | Crystal Falls, MI | 5 GWh | May 1914 | Dec 2025 | Water |
| Big Quinnesec 61 | Wisconsin Electric Power Co | Iron Mountain, MI | 2 GWh | Apr 1914 | Dec 2025 | Water |
| Keokuk | Union Electric Co - (MO) | Keokuk, IA | 962 GWh | Jul 1913 | Dec 2025 | Water |
| Loud | Consumers Energy Co - (MI) | Oscoda, MI | 16 GWh | Dec 1912 | Dec 2025 | Water |
| Saxon Falls | Northern States Power Co - Minnesota | Saxon, WI | 9 GWh | Dec 1912 | Dec 2025 | Water |
| Sylvan | ALLETE, Inc. | Pillager, MN | 10 GWh | Dec 1912 | Dec 2025 | Water |
| Port Edwards Mill | Domtar Industries Inc | Port Edwards, WI | 37 GWh | Dec 1912 | May 2026 | Water |
| Five Channels | Consumers Energy Co - (MI) | Oscoda, MI | 23 GWh | Dec 1911 | Dec 2025 | Water |
| Georgia-Pacific Corp - Nekoosa Mill | Domtar Industries Inc | Nekoosa, WI | 160 GWh | Dec 1911 | May 2026 | Natural Gas : 43.1% Black Liquor : 41.5% Water : 15.5% |
| Cooke | Consumers Energy Co - (MI) | Oscoda, MI | 24 GWh | Dec 1910 | Dec 2025 | Water |
| High Falls (WI) | Wisconsin Public Service Corp | Town of Stephenson, WI | 16 GWh | Jul 1910 | Dec 2025 | Water |
| Cedar Falls (WI) | Northern States Power Co - Minnesota | Menomonie, WI | 31 GWh | Dec 1909 | Dec 2025 | Water |
| St Croix Falls | Northern States Power Co - Minnesota | St Croix Falls, WI | 80 GWh | Dec 1909 | Dec 2025 | Water |
| Domtar Paper Company Rothschild | Domtar Paper Company Rothschild | Rothschild, WI | 524 MWh | Dec 1909 | Dec 2025 | Water |
| Croton | Consumers Energy Co - (MI) | Newaygo, MI | 29 GWh | Dec 1906 | Dec 2025 | Water |
| Webber | Consumers Energy Co - (MI) | Lyons, MI | 10 GWh | Dec 1906 | Dec 2025 | Water |
| Thomson | ALLETE, Inc. | Carlton, MN | 198 GWh | Dec 1906 | Dec 2025 | Water |
| White River (WI) | Northern States Power Co - Minnesota | Ashland, WI | 3 GWh | Dec 1906 | Dec 2025 | Water |
| Little Falls (MN) | ALLETE, Inc. | Little Falls, MN | 27 GWh | Dec 1905 | Dec 2025 | Water |
| Norway (MI) | City of Norway - (MI) | Norway, MI | 30 GWh | May 1905 | Dec 2025 | Water |
| Wisconsin Rapids | Consolidated Water Power Co | Wisconsin Rapids, WI | 46 GWh | Dec 1902 | Dec 2025 | Water |
| Edison Sault | Cloverland Electric Co-op | Sault Ste. Marie, MI | 181 GWh | Jun 1901 | Dec 2025 | Water |
| Apple River | Northern States Power Co - Minnesota | Somerset, WI | 13 GWh | Dec 1900 | Dec 2025 | Water |
| Little Quinnesec Falls Hydro Project | Eagle Creek Renewable Energy, LLC | Niagara, WI | 61 GWh | Nov 1900 | Dec 2025 | Water |
| Biron | Consolidated Water Power Co | Biron, WI | 30 GWh | Dec 1895 | Dec 2025 | Water |
| Whiting | Consolidated Water Power Co | Whiting, WI | 16 GWh | Dec 1890 | Dec 2025 | Water |
| Heartwood Solar | Heartwood Solar, LLC | Allen, MI | 22 GWh | - | May 2026 | Solar |
| Fish Creek Solar Park | DTE Electric Company | Greenville, MI | 49 GWh | - | May 2026 | Solar |
| Mission Road Solar Park | DTE Electric Company | Rosebush, MI | 60 GWh | - | May 2026 | Solar |
| Cooks Mill PV I | Cooks Mill PV I, LLC | Matoon, IL | 45 GWh | - | May 2026 | Solar |
| Cherry Valley PV I | Cherry Valley PV I, LLC | Cherry Valley, AR | 61 GWh | - | May 2026 | Solar |
| Crooked Creek PV I | Crooked Creek PV I, LLC | Salem, IL | 42 GWh | - | May 2026 | Solar |
| Lotus Wind | Lotus Wind, LLC | Modesto, IL | 135 GWh | - | May 2026 | Wind |
| Mondu Solar LLC | Mondu Solar LLC | Livonia, LA | 22 GWh | - | May 2026 | Solar |
| Wheatland | Origis Energy USA, Inc | Wheatland, IN | 107 GWh | - | May 2026 | Solar |
| Adelite Solar, LLC | Birch Creek Development | Hamilton, MO | 14 GWh | - | May 2026 | Solar |
| Kelso 2 Solar | Kelso 2 Solar, LLC | Benton, MO | 111 GWh | - | May 2026 | Solar |
| Redfield Solar | Redfield PV I, LLC | Sheridan, AR | 36 GWh | - | May 2026 | Solar |
| Petersburg Energy Center | Petersburg Energy Center, LLC | Petersburg, IN | 122 GWh | - | May 2026 | Solar |
| Split Rail Solar Energy LLC | Invenergy Services LLC | Warrenton, MO | 102 GWh | - | May 2026 | Solar |
| Renegade Solar Energy LLC | Upper Michigan Energy Resources Company | Rock, MI | 40 GWh | - | May 2026 | Solar |
| Archtop Solar | Archtop Property Management LLC | Gibson City, IL | 64 GWh | - | May 2026 | Solar |
| Badger Wind, LLC | Badger Wind , LLC | Northwest McIntosh, ND | 374 GWh | - | May 2026 | Wind |
| Prairie Solar LLC | MN8 Energy LLC | Sidney, IL | 103 GWh | - | May 2026 | Solar |
| Newton Solar BESS LLC | Vistra Corp | Newton, IL | 32 GWh | - | May 2026 | Solar |
| Muskegon Solar | Consumers Energy Co - (MI) | Muskegon, MI | 117 GWh | - | May 2026 | Solar |
| Sterlington Solar | Entergy Louisiana LLC | Sterlington, LA | 37 GWh | - | May 2026 | Solar |
| Branch Solar Project | Branch Solar, LLC | Coldwater, MI | 12 GWh | - | 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 |