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 |
|---|---|---|---|---|---|---|
| Princeton Solar | Altorfer Inc. | Princeton, IL | 904 MWh | Feb 2025 | Dec 2025 | Solar |
| Rantoul Solar | Altorfer Inc. | Rantoul, IL | 5 MWh | Nov 2016 | Dec 2025 | Solar |
| Allie L.L.C. (CSG) | Allie L.L.C. | Renville, MN | 2 GWh | Jul 2022 | Dec 2025 | Solar |
| Jean Duluth Solar | ALLETE, Inc. | Duluth, MN | 2 GWh | Nov 2022 | Dec 2025 | Solar |
| Laskin Solar | ALLETE, Inc. | Hoyt Lakes, MN | 8 GWh | Nov 2022 | Dec 2025 | Solar |
| Sylvan Solar | ALLETE, Inc. | Pillager, MN | 25 GWh | Jun 2023 | Dec 2025 | Solar |
| Bison 4 Wind Energy Center | ALLETE, Inc. | New Salem, ND | 573 GWh | Dec 2014 | Dec 2025 | Wind |
| Bison 2 Wind Energy Center | ALLETE, Inc. | New Salem, ND | 270 GWh | Nov 2012 | Dec 2025 | Wind |
| Bison 3 Wind Energy Center | ALLETE, Inc. | New Salem, ND | 268 GWh | Nov 2012 | Dec 2025 | Wind |
| Rapids Energy Center | ALLETE, Inc. | Grand Rapids, MN | 40 GWh | Dec 1942 | Dec 2025 | Natural Gas : 81.7% Water : 18.3% |
| Prairie River | ALLETE, Inc. | Grand Rapids, MN | 2 GWh | Mar 1920 | Dec 2025 | Water |
| Thomson | ALLETE, Inc. | Carlton, MN | 198 GWh | Dec 1906 | Dec 2025 | Water |
| Sylvan | ALLETE, Inc. | Pillager, MN | 10 GWh | Dec 1912 | Dec 2025 | Water |
| Scanlon | ALLETE, Inc. | Scanlon, MN | 7 GWh | Dec 1922 | Dec 2025 | Water |
| Pillager | ALLETE, Inc. | Pillager, MN | 7 GWh | Dec 1916 | Dec 2025 | Water |
| M L Hibbard | ALLETE, Inc. | Duluth, MN | 98 GWh | May 1949 | May 2026 | Wood/Wood Waste Solids : 91.1% Subbituminous Coal : 6.8% Natural Gas : 2.1% |
| Little Falls (MN) | ALLETE, Inc. | Little Falls, MN | 27 GWh | Dec 1905 | Dec 2025 | Water |
| Knife Falls | ALLETE, Inc. | Cloquet, MN | 9 GWh | Dec 1921 | Dec 2025 | Water |
| Fond Du Lac | ALLETE, Inc. | Duluth, MN | 38 GWh | Dec 1923 | Dec 2025 | Water |
| Clay Boswell | ALLETE, Inc. | Cohasset, MN | 6 TWh | Jun 1958 | May 2026 | Subbituminous Coal : 99.8% |
| Blanchard | ALLETE, Inc. | Royalton, MN | 72 GWh | Jan 1925 | Dec 2025 | Water |
| Winton | ALLETE, Inc. | Winton, MN | 18 GWh | Jul 1923 | Dec 2025 | Water |
| Syl Laskin | ALLETE, Inc. | Hoyt Lakes, MN | 196 GWh | May 1953 | Dec 2025 | Natural Gas |
| Taconite Ridge 1 Wind Energy Center | ALLETE, Inc. | Mountain Iron, MN | 53 GWh | Apr 2008 | Dec 2025 | Wind |
| Bison I Wind Energy Center | ALLETE, Inc. | New Salem, ND | 196 GWh | Nov 2010 | Dec 2025 | Wind |
| Storm Lake 1 | ALLETE Clean Energy | Alta, IA | 87 GWh | Apr 1999 | Dec 2025 | Wind |
| Storm Lake II | ALLETE Clean Energy | Alta, IA | 115 GWh | Mar 1999 | Dec 2025 | Wind |
| Lake Benton I | ALLETE Clean Energy | Lake Benton, MN | 235 GWh | Jan 1998 | Dec 2025 | Wind |
| Lincoln Heights II | ALLETE Clean Energy | Lake Benton, MN | 5 GWh | Apr 2006 | Dec 2025 | Wind |
| Glen Ullin Energy Center | ALLETE Clean Energy | Glen Ullin, ND | 423 GWh | Nov 2019 | May 2026 | Wind |
| Lincoln Heights I | ALLETE Clean Energy | Lake Benton, MN | 8 GWh | Apr 2006 | Dec 2025 | Wind |
| Cisco | ALLETE Clean Energy | Brewster, MN | 12 GWh | Jan 2008 | Dec 2025 | Wind |
| Odell Wind Farm | Algonquin Power Co | Mountain Lake, MN | 769 GWh | Jun 2016 | Dec 2025 | Wind |
| Alden Road Harvard Solar 1 | Alden Road Harvard Solar 1, LLC | Harvard, IL | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| Air Products Port Arthur | Air Products LLC | Port Arthur, TX | 1 TWh | Oct 2000 | Dec 2025 | Natural Gas : 93.4% Other Gas : 6.6% |
| Geismar Cogen | Air Liquide Large Industries U S LP | Geismar, LA | 528 GWh | Dec 1999 | Dec 2025 | Natural Gas |
| 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% |
| Rhinelander Mill | Ahlstrom-Munksjo | Rhinelander, WI | 7 GWh | Nov 1917 | May 2026 | Water |
| Agriwind | Agriwind Holdings, LLC | Tiskilwa, IL | 17 GWh | Jun 2007 | Dec 2025 | Wind |
| Agrilectric Power Partners Ltd | Agrilectric Power Partners Ltd | Lake Charles, LA | 84 GWh | Jun 1984 | Dec 2025 | Agricultural By-Products : 99.5% |
| Truman Solar | Agilitas Energy, Inc. | Colombia, MO | 20 GWh | May 2021 | Dec 2025 | Solar |
| Warrick | AGC Division of APGI Inc | Newburgh, IN | 3 TWh | Mar 1960 | May 2026 | Bituminous Coal : 98.3% Natural Gas : 1.7% |
| Harding Street | AES Indiana | Indianapolis, IN | 4 TWh | May 1958 | May 2026 | Natural Gas |
| Eagle Valley (IN) | AES Indiana | Martinsville, IN | 5 TWh | Nov 1951 | May 2026 | Natural Gas |
| AES Petersburg | AES Indiana | Petersburg, IN | 5 TWh | May 1967 | May 2026 | Bituminous Coal : 99.8% |
| Georgetown | AES Indiana | Indianapolis, IN | 307 GWh | May 2000 | Dec 2025 | Natural Gas |
| Pullman Solar, LLC | AES Distributed Energy | Lee Township, MI | 33 GWh | Nov 2022 | Dec 2025 | Solar |
| Letts Creek Solar, LLC | AES Distributed Energy | Grass Lake, MI | 25 GWh | Nov 2022 | Dec 2025 | Solar |
| Hobart Solar, LLC | AES Distributed Energy | Hobart, IN | 49 MWh | Oct 2012 | Dec 2025 | Solar |
| Waterloo Solar, LLC | AES Distributed Energy | Waterloo, IN | 584 MWh | Dec 2011 | Jan 2025 | Solar |
| Valparaiso Solar, LLC | AES Distributed Energy | Valparaiso, IN | 427 MWh | Nov 2012 | Oct 2025 | Solar |
| Cement City Solar, LLC | AES Distributed Energy | Cement City, MI | 32 GWh | Dec 2022 | Dec 2025 | Solar |
| AES Belleville Solar LLC | AES Distributed Energy | Belleville, IL | 6 GWh | Aug 2021 | Dec 2025 | Solar |
| Morris Solar | AES Clean Energy | Kirksville, MO | 416 GWh | May 2025 | May 2026 | Solar |
| Oak Ridge Solar | AES Clean Energy | Oak Ridge, LA | 413 GWh | Nov 2023 | May 2026 | Solar |
| Delta Wind Farm (MS) | AES Clean Energy | Dundee, MS | 514 GWh | Mar 2024 | May 2026 | Wind |
| Triple S Solar I LLC CSG | AES Clean Energy | Kansas, IL | 381 MWh | Sep 2025 | Dec 2025 | Solar |
| Calhoun County Solar Project | AES Clean Energy | Sheridan Township, MI | 250 GWh | Feb 2025 | May 2026 | Solar |
| Lemond Solar | Adapture Renewables, Inc. | Owatonna, MN | 9 GWh | May 2017 | Dec 2025 | Solar |
| Adams PV Plant | Adams PV Plant (WI) | Adams, WI | 15 GWh | Jun 2023 | Dec 2025 | Solar |
| Brown County Wind Turbine | Adams Electric Cooperative | Mount Sterling, IL | 3 MWh | Aug 2011 | Feb 2025 | Wind |
| Ada Cogeneration LP | Ada Cogeneration LLC | Ada, MI | 185 GWh | Sep 1990 | Dec 2025 | Natural Gas |
| Apple Canyon Lake Solar | ACM Solar, LLC. | Apple River, IL | 3 GWh | Nov 2020 | Dec 2025 | Solar |
| Tatanka Wind Power LLC | Acciona Wind Energy USA LLC | Ashley, ND | 411 GWh | Dec 2007 | May 2026 | Wind |
| Velva Windfarm LLC | Acciona Wind Energy USA LLC | Velva, ND | 20 GWh | Nov 2005 | Dec 2025 | Wind |
| Briscoe 2A | 7th Road Solar 2, LLC (Briscoe 2A) | Lostant, IL | 5 GWh | Jan 2023 | Dec 2025 | Solar |
| Briscoe 1A | 7th Road Solar 1, LLC (Briscoe 1A) | Tonica, IL | 4 GWh | Jan 2023 | Dec 2025 | Solar |
| 2662 Freeport Solar 1 CSG | 2662 Freeport Solar 1, LLC | Freeport, IL | 3 GWh | Nov 2020 | Dec 2025 | Solar |
| 13 Mile Solar, LLC | 13 Mile Solar, LLC | Battle Creek, MI | 4 GWh | Nov 2020 | 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 |