Midcontinent Independent System Operator, Inc.
Balancing Authority Summary Information
Midcontinent Independent System Operator, Inc. is ranked #2 out of 65 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 | Jan 2026 |
| Annual Generation | 656.9 TWh |
| Power Plants | 2,831 |
| Utilities | 1,296 |
| Ranked #2 out of 65 in terms of net annual generation | |
| Ranked #2 out of 53 in terms of annual generation from natural gas | |
| Power Plant Types | Natural Gas | 35.4% Coal | 28.9% Wind | 15.1% Nuclear | 14% Solar | 4.6% Water | 1.5% 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 |
|---|---|---|---|---|---|---|
| Warrick | AGC Division of APGI Inc | Newburgh, IN | 3 TWh | Mar 1960 | Oct 2025 | Bituminous Coal : 98.5% Natural Gas : 1.5% |
| Harding Street | AES Indiana | Indianapolis, IN | 3 TWh | May 1958 | Oct 2025 | Natural Gas |
| Eagle Valley (IN) | AES Indiana | Martinsville, IN | 6 TWh | Nov 1951 | Oct 2025 | Natural Gas |
| AES Petersburg | AES Indiana | Petersburg, IN | 5 TWh | May 1967 | Oct 2025 | Bituminous Coal : 99.8% |
| Hoosier Wind Project LLC | AES Indiana | Goodland, IN | 208 GWh | Oct 2009 | Dec 2023 | Wind |
| Georgetown | AES Indiana | Indianapolis, IN | 466 GWh | May 2000 | Dec 2024 | Natural Gas |
| Hobart Solar, LLC | AES Distributed Energy | Hobart, IN | 215 MWh | Oct 2012 | Nov 2024 | Solar |
| Waterloo Solar, LLC | AES Distributed Energy | Waterloo, IN | 592 MWh | Dec 2011 | Dec 2024 | Solar |
| Valparaiso Solar, LLC | AES Distributed Energy | Valparaiso, IN | 1 GWh | Nov 2012 | Sep 2024 | Solar |
| Cement City Solar, LLC | AES Distributed Energy | Cement City, MI | 37 GWh | Dec 2022 | Dec 2024 | Solar |
| AES Belleville Solar LLC | AES Distributed Energy | Belleville, IL | 13 GWh | Aug 2021 | Nov 2024 | Solar |
| Letts Creek Solar, LLC | AES Distributed Energy | Grass Lake, MI | 28 GWh | Nov 2022 | Dec 2024 | Solar |
| Pullman Solar, LLC | AES Distributed Energy | Lee Township, MI | 38 GWh | Nov 2022 | Dec 2024 | Solar |
| Oak Ridge Solar | AES Clean Energy | Oak Ridge, LA | 412 GWh | Nov 2023 | Oct 2025 | Solar |
| Delta Wind Farm (MS) | AES Clean Energy | Dundee, MS | 501 GWh | Mar 2024 | Oct 2025 | Wind |
| Morris Solar | AES Clean Energy | Kirksville, MO | 202 GWh | - | Oct 2025 | Solar |
| Calhoun County Solar Project | AES Clean Energy | Sheridan Township, MI | 198 GWh | - | Oct 2025 | Solar |
| Bloomfield Municipal Utilities Solar | AEP Onsite Partners, LLC | Bloomfield, IA | 2 GWh | Mar 2019 | Dec 2024 | Solar |
| Galesburg Solar Array | AEP Onsite Partners, LLC | Oquawka, IL | 3 GWh | Feb 2020 | Dec 2024 | Solar |
| Porter Way Community Solar Garden | AEP Onsite Partners, LLC | Waconia, MN | 5 GWh | Jan 2018 | Oct 2025 | Solar |
| Sherburne Community Solar | AEP Onsite Partners, LLC | Clear Lake, MN | 8 GWh | Feb 2018 | Oct 2025 | Solar |
| Lady Slipper Solar Array CSG | AEP Onsite Partners, LLC | Red Wing, MN | 6 GWh | Sep 2019 | Dec 2024 | Solar |
| Spooner Solar Array | AEP Onsite Partners, LLC | Spooner, WI | 4 GWh | May 2019 | Dec 2024 | Solar |
| Barron Solar Array | AEP Onsite Partners, LLC | Barron, WI | 6 GWh | Jul 2021 | Dec 2024 | Solar |
| Rice Lake Solar Array | AEP Onsite Partners, LLC | Rice Lake, WI | 7 GWh | May 2019 | Dec 2024 | Solar |
| Brainerd Airport | AEP Onsite Partners, LLC | Brainerd, MN | 10 GWh | Nov 2022 | Dec 2024 | Solar |
| Lemond Solar | Adapture Renewables, Inc. | Owatonna, MN | 9 GWh | May 2017 | Dec 2024 | Solar |
| Adams PV Plant | Adams PV Plant (WI) | Adams, WI | 17 GWh | Jun 2023 | Dec 2024 | Solar |
| Brown County Wind Turbine | Adams Electric Cooperative | Mount Sterling, IL | 1 GWh | Aug 2011 | Apr 2024 | Wind |
| Ada Cogeneration LP | Ada Cogeneration LLC | Ada, MI | 158 GWh | Sep 1990 | Dec 2024 | Natural Gas |
| ADA Carbon Solutions Red River | ADA Carbon Solutions (Red River), LLC | Coushatta, LA | 99 GWh | Jan 2011 | Oct 2025 | Waste Heat |
| Apple Canyon Lake Solar | ACM Solar, LLC. | Apple River, IL | 3 GWh | Nov 2020 | Dec 2024 | Solar |
| Tatanka Wind Power LLC | Acciona Wind Energy USA LLC | Ashley, ND | 479 GWh | Dec 2007 | Oct 2025 | Wind |
| Velva Windfarm LLC | Acciona Wind Energy USA LLC | Velva, ND | 25 GWh | Nov 2005 | Dec 2024 | Wind |
| Anchor Wind, LLC | Acciona Energy USA Global, LLC | Mechanicsville, IA | 6 GWh | Sep 2012 | May 2024 | Wind |
| Briscoe 2A | 7th Road Solar 2, LLC (Briscoe 2A) | Lostant, IL | 5 GWh | Jan 2023 | Dec 2024 | Solar |
| Briscoe 1A | 7th Road Solar 1, LLC (Briscoe 1A) | Tonica, IL | 4 GWh | Jan 2023 | Dec 2024 | Solar |
| 2662 Freeport Solar 1 CSG | 2662 Freeport Solar 1, LLC | Freeport, IL | 4 GWh | Nov 2020 | Dec 2024 | Solar |
| 13 Mile Solar, LLC | 13 Mile Solar, LLC | Battle Creek, MI | 4 GWh | Nov 2020 | Dec 2024 | Solar |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #60 | Alcoa Power Generating, Inc. - Yadkin Division | 643.5 GWh | 4 |
| #27 | Associated Electric Cooperative, Inc. | 23.9 TWh | 47 |
| #13 | Duke Energy Carolinas | 111.6 TWh | 565 |
| #52 | Duke Energy Progress West | 4.3 TWh | 10 |
| #24 | Louisville Gas and Electric Company and Kentucky Utilities Company | 34.2 TWh | 25 |
| #1 | PJM Interconnection, LLC | 872.9 TWh | 2,465 |
| #6 | Southern Company Services, Inc. - Trans | 249.9 TWh | 417 |
| #5 | Southwest Power Pool | 300.6 TWh | 835 |
| #51 | Southwestern Power Administration | 5.0 TWh | 34 |
| #9 | Tennessee Valley Authority | 161.0 TWh | 204 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #1 | PJM Interconnection, LLC | 872.9 TWh | 2,465 |
| #2 | Midcontinent Independent System Operator, Inc. | 656.9 TWh | 2,831 |
| #3 | Electric Reliability Council of Texas, Inc. | 484.7 TWh | 1,313 |
| #5 | Southwest Power Pool | 300.6 TWh | 835 |
| #6 | Southern Company Services, Inc. - Trans | 249.9 TWh | 417 |
| #7 | California Independent System Operator | 184.8 TWh | 2,075 |
| #9 | Tennessee Valley Authority | 161.0 TWh | 204 |
| #10 | Florida Power & Light Co. | 149.6 TWh | 187 |
| #12 | New York Independent System Operator | 132.6 TWh | 1,211 |
| #13 | Duke Energy Carolinas | 111.6 TWh | 565 |