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% |
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 |
|---|---|---|---|---|---|---|
| Novel - OYA of Mapleton CSG | NRG MN Community LLC | Mapleton, MN | 6 GWh | Jun 2018 | Dec 2025 | Solar |
| Novel OYA of Osakis CSG | NRG MN Community LLC | Osakis, MN | 9 GWh | Jun 2018 | Dec 2025 | Solar |
| Shakopee Met Council WTP | Oak Leaf Solar V LLC | Shakopee, MN | 2 GWh | Feb 2016 | Dec 2025 | Solar |
| Taft Cogeneration Facility | Occidental Chemical Corporation | Hahnville, LA | 6 TWh | Jun 2002 | Jul 2026 | Natural Gas : 97.3% Other Gas : 2.7% |
| Stiles | Oconto Electric Cooperative | Oconto Falls, WI | 5 GWh | Feb 1949 | Dec 2025 | Water |
| OE IL Solar 3 | OE IL Solar 3, LLC | Oregon, IL | 4 GWh | Feb 2022 | Dec 2025 | Solar |
| Old Gold Energy Center, LLC | Old Gold Energy Center, LLC | Joice, IA | 57 GWh | Sep 2001 | Dec 2025 | Wind |
| Olinda Trail Solar | Olinda Trail Solar LLC | Lindstrom, MN | 2 GWh | Aug 2019 | Dec 2025 | Solar |
| Oliver Wind III, LLC | Oliver Wind III, LLC | Mandan, ND | 382 GWh | Dec 2016 | Jul 2026 | Wind |
| Olmsted Waste Energy | Olmsted County Public Works - (MN) | Rochester, MN | 47 GWh | Mar 1987 | Dec 2025 | Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.8% Natural Gas : 0.5% |
| Olney Solar II CSG | Olney Solar II, LLC | Olney, IL | 4 GWh | May 2021 | Dec 2025 | Solar |
| Greenfield | OneEnergy, Inc. | Coon Valley, WI | 200 MWh | Oct 2025 | Dec 2025 | Solar |
| Viola | OneEnergy, Inc. | Webster, WI | 65 MWh | Nov 2025 | Dec 2025 | Solar |
| Next Generation | OneEnergy, Inc. | Woodville, WI | 331 MWh | Sep 2025 | Dec 2025 | Solar |
| Luck | OneEnergy, Inc. | Luck, WI | 85 MWh | Nov 2025 | Dec 2025 | Solar |
| Bridge Creek | OneEnergy, Inc. | Augusta, WI | 258 MWh | Oct 2025 | Dec 2025 | Solar |
| Little Cedar | OneEnergy, Inc. | Little Cedar, IA | 65 MWh | Nov 2025 | Dec 2025 | Solar |
| Hannibal | OneEnergy, Inc. | Gillman, WI | 378 MWh | Sep 2025 | Dec 2025 | Solar |
| Grand Meadow (PV) | OneEnergy, Inc. | Grand Meadow, MN | 425 MWh | Oct 2025 | Dec 2025 | Solar |
| Elk Mound (PV) | OneEnergy, Inc. | Elk Mound, WI | 653 MWh | Aug 2025 | Dec 2025 | Solar |
| Douglas (IA) | OneEnergy, Inc. | Riceville, IA | 804 MWh | Aug 2025 | Dec 2025 | Solar |
| Bright Future | OneEnergy, Inc. | Hammond, WI | 361 MWh | Sep 2025 | Dec 2025 | Solar |
| Bancroft (MN) | OneEnergy, Inc. | Albert Lea, MN | 589 MWh | Sep 2025 | Dec 2025 | Solar |
| Barron Solar Array | Onsite Partners, LLC | Barron, WI | 6 GWh | Jul 2021 | Dec 2025 | Solar |
| Rice Lake Solar Array | Onsite Partners, LLC | Rice Lake, WI | 7 GWh | May 2019 | Dec 2025 | Solar |
| Rice Lake II | Onsite Partners, LLC | Rice Lake, WI | 5 GWh | Aug 2024 | Dec 2025 | Solar |
| Brainerd Airport | Onsite Partners, LLC | Brainerd, MN | 10 GWh | Nov 2022 | Dec 2024 | Solar |
| Spooner Solar Array | Onsite Partners, LLC | Spooner, WI | 3 GWh | May 2019 | Dec 2025 | Solar |
| Lady Slipper Solar Array CSG | Onsite Partners, LLC | Red Wing, MN | 7 GWh | Sep 2019 | Dec 2025 | Solar |
| Bloomfield Municipal Utilities Solar | Onsite Partners, LLC | Bloomfield, IA | 2 GWh | Mar 2019 | Dec 2025 | Solar |
| Sherburne Community Solar | Onsite Partners, LLC | Clear Lake, MN | 8 GWh | Feb 2018 | Jul 2026 | Solar |
| Porter Way Community Solar Garden | Onsite Partners, LLC | Waconia, MN | 5 GWh | Jan 2018 | Jul 2026 | Solar |
| Galesburg Solar Array | Onsite Partners, LLC | Oquawka, IL | 3 GWh | Feb 2020 | Dec 2025 | Solar |
| Sumrall II Solar Farm | Onward Energy | Sumrall, MS | 108 GWh | Nov 2017 | Jul 2026 | Solar |
| Indy Solar I, LLC | Onward Energy | Indianapolis, IN | 15 GWh | Nov 2013 | Jul 2026 | Solar |
| Indy Solar II, LLC | Onward Energy | Indianapolis, IN | 15 GWh | Nov 2013 | Jul 2026 | Solar |
| Indy Solar III, LLC | Onward Energy | Indianapolis, IN | 13 GWh | Nov 2013 | Jul 2026 | Solar |
| Fort Polk (fka Johnson) - Chaffee East | Onyx Asset Services Group | Fort Polk North, LA | 644 MWh | Oct 2025 | Dec 2025 | Solar |
| Fort Polk (fka Johnson) - Chaffee West | Onyx Asset Services Group | Fort Polk North, LA | 750 MWh | Oct 2025 | Dec 2025 | Solar |
| Marathon Petroleum - Robinson Refinery | Onyx Asset Services Group | Robinson, IL | 5 GWh | May 2025 | Dec 2025 | Solar |
| Toyota Boshoku | Onyx Asset Services Group | Lawrenceville, IL | 5 GWh | Apr 2025 | Dec 2025 | Solar |
| Wheatland | Origis Energy USA, Inc | Wheatland, IN | 187 GWh | - | Jul 2026 | Solar |
| Orion Community Solar | Orion Community Solar | St. Joseph, MN | 4 GWh | Dec 2016 | Dec 2025 | Solar |
| Benton County Wind Farm | Orion Energy Group LLC | Earl Park, IN | 343 GWh | Apr 2008 | Dec 2025 | Wind |
| Ivanhoe Generation Facility | Orion Engineered Carbons | Franklin, LA | 72 GWh | Mar 2023 | Dec 2025 | Waste Heat |
| OREG 3 Inc | Ormat Nevada Inc | Trimont, MN | 43 GWh | Jul 2010 | Jul 2026 | Waste Heat |
| Osceola Windpower II | Osceola Windpower II | Harris, IA | 191 GWh | Aug 2008 | Jul 2026 | Wind |
| Otsego Mill Power Plant | Otsego Paper Inc | Otsego, MI | 163 GWh | Oct 1995 | Dec 2025 | Natural Gas |
| Otter Creek Ethanol Poet - Ashton | Otter Creek Ethanol LLC - Poet Ashton | Ashton, IA | 45 GWh | Feb 2004 | Jul 2026 | Natural Gas |
| Astoria Station | Otter Tail Power Co | Astoria, SD | 493 GWh | Mar 2021 | Jul 2026 | Natural Gas |
| Hoot Lake Solar | Otter Tail Power Co | Fergus Falls, MN | 73 GWh | Jul 2023 | Jul 2026 | Solar |
| Solway CT | Otter Tail Power Co | Solway, MN | 143 GWh | Apr 2003 | Dec 2025 | Natural Gas : 99.5% |
| Hoot Lake | Otter Tail Power Co | Fergus Falls, MN | 4 GWh | Aug 1914 | Dec 2025 | Water |
| Lake Preston | Otter Tail Power Co | Lake Preston, SD | 135 MWh | May 1978 | Dec 2025 | Distillate Fuel Oil |
| Luverne Wind Energy Center | Otter Tail Power Co | Luverne, ND | 151 GWh | Aug 2009 | Dec 2025 | Wind |
| Big Stone | Otter Tail Power Co | Big Stone City, SD | 2 TWh | Apr 1975 | Jul 2026 | Subbituminous Coal : 99.7% |
| Jamestown | Otter Tail Power Co | Jamestown, ND | 1 GWh | Apr 1976 | Dec 2025 | Distillate Fuel Oil |
| Ashtabula Wind III LLC | Otter Tail Power Co | Luverne, ND | 120 GWh | Nov 2010 | Dec 2025 | Wind |
| Ashtabula Wind Energy Center | Otter Tail Power Co | Luverne, ND | 89 GWh | Sep 2008 | Dec 2025 | Wind |
| Langdon Wind Energy Center | Otter Tail Power Co | Langdon, ND | 173 GWh | Nov 2007 | Dec 2025 | Wind |
| Merricourt Wind Energy Center | Otter Tail Power Co | Kulm, ND | 565 GWh | Nov 2020 | Jul 2026 | Wind |
| Coyote | Otter Tail Power Co | Beulah, ND | 2 TWh | Apr 1981 | Jul 2026 | Lignite Coal : 99.8% |
| DeRidder Mill | Packaging Corporation of America | DeRidder, LA | 405 GWh | Sep 1969 | Dec 2025 | Black Liquor : 44.6% Wood/Wood Waste Solids : 37.8% Natural Gas : 17.6% |
| Palmer Community Solar LLC CSG | Palmer Community Solar LLC | North Branch, MN | 2 GWh | Jul 2021 | Dec 2025 | Solar |
| Paynesville Community Solar | Paynesville Community Solar | Paynesville, MN | 8 GWh | Nov 2016 | Dec 2025 | Solar |
| 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% |
| PCA, Filer City Mill | PCA, Filer City Mill | Filer City, MI | 94 GWh | Dec 1949 | Jul 2026 | Natural Gas |
| Pearl River Solar Park LLC | Pearl River Solar Park, LLC | Morton, MS | 423 GWh | Jun 2024 | Jul 2026 | Solar |
| Pegasus Community Solar | Pegasus Community Solar | Brooten, MN | 3 GWh | Jul 2017 | Dec 2025 | Solar |
| Pegasus Wind | Pegasus Wind, LLC | Reese, MI | 376 GWh | Nov 2019 | Jul 2026 | Wind |
| Pepin Garden | Pepin Garden LLC | Kellogg, MN | 2 GWh | Oct 2023 | Dec 2025 | Solar |
| Petersburg Energy Center | Petersburg Energy Center, LLC | Petersburg, IN | 220 GWh | - | Jul 2026 | Solar |
| Pheasant Run Wind LLC | Pheasant Run Wind LLC | Pigeon, MI | 245 GWh | Nov 2013 | Jul 2026 | Wind |
| Phoenix Solar South Farms LLC Solar Farm | Phoenix Solar South Farms LLC | Champaign, IL | 5 GWh | Nov 2015 | Jul 2026 | Solar |
| Pine Bluff Energy Center | Pine Bluff Energy LLC | Pine Bluff, AR | 1 TWh | Jul 2001 | Jul 2026 | Natural Gas |
| Pine Island Solar CSG | Pine Island Holdco, LLC | Pine Island, MN | 6 GWh | Jan 2017 | Dec 2025 | Solar |
| Pioneer Prairie Wind Farm | Pioneer Prairie Wind Farm I, LLC | McIntire, IA | 838 GWh | Sep 2008 | Jul 2026 | Wind |
| St. Clair Solar 3 | Pivot Energy | Washington Park, IL | 4 GWh | May 2024 | Dec 2025 | Solar |
| Marion Solar 4b LLC | Pivot Energy | Sandoval, IL | 4 GWh | Apr 2024 | Dec 2025 | Solar |
| Kankakee Solar 3 | Pivot Energy | Manteno, IL | 3 GWh | Oct 2024 | Dec 2025 | Solar |
| Putnam Solar 1 | Pivot Energy | Granville, IL | 4 GWh | Apr 2024 | Dec 2025 | Solar |
| Putnam Solar 1B | Pivot Energy | Granville, IL | 4 GWh | May 2024 | Dec 2025 | Solar |
| Kankakee Solar 1 | Pivot Energy | Bourbonnais, IL | 4 GWh | Apr 2024 | Dec 2025 | Solar |
| Clinton Solar 2 | Pivot Energy | Centralia, IL | 4 GWh | Dec 2024 | Dec 2025 | Solar |
| Bureau Solar 1 | Pivot Energy | Princeton, IL | 2 GWh | Aug 2025 | Dec 2025 | Solar |
| LaSalle Solar 6 | Pivot Energy | Ottawa, IL | 582 MWh | Oct 2025 | Dec 2025 | Solar |
| Peoria Solar 3 | Pivot Energy | Dunlap, IL | 219 MWh | Nov 2025 | Dec 2025 | Solar |
| St. Clair Solar 5 | Pivot Energy | Lebanon, IL | 2 GWh | Jun 2025 | Dec 2025 | Solar |
| Clinton Solar 2b | Pivot Energy | Centralia, IL | 4 GWh | Oct 2024 | Dec 2025 | Solar |
| Pivot Energy Minnesota Solar 1 | Pivot Energy | Clinton Falls, MN | 2 GWh | May 2023 | Dec 2025 | Solar |
| Pivot Energy Minnesota Solar 10 | Pivot Energy | Greenwald, MN | 1 GWh | May 2023 | Dec 2025 | Solar |
| Clinton Solar 4b | Pivot Energy | Carlyle, IL | 2 GWh | May 2025 | Dec 2025 | Solar |
| LaSalle Solar 1 | Pivot Energy | Ransom, IL | 2 GWh | Apr 2025 | Dec 2025 | Solar |
| Edgar Solar 1 | Pivot Energy | Paris, IL | 5 GWh | Feb 2025 | Dec 2025 | Solar |
| Marion Solar 2 | Pivot Energy | Sandoval, IL | 2 GWh | Dec 2024 | Dec 2025 | Solar |
| Stevens Point Mill | Pixelle Specialty Solution, LLC | Stevens Point, WI | 14 GWh | Jan 2002 | Dec 2025 | Natural Gas |
| Port Allen (LA) | Placid Refining Co LLC | Port Allen, LA | 50 GWh | Apr 1990 | Dec 2025 | Natural Gas |
| Pleasantville Solar Park | Pleasantville Solar Park LLC | Ipava, IL | 259 GWh | Oct 2025 | Jul 2026 | Solar |
| Poet Bioprocessing Emmetsburg | Poet Bioprocessing Emmetsburg | Emmetsburg, IA | 18 GWh | Nov 2023 | Dec 2025 | Natural Gas : 84.7% Other Biomass Solids : 15.3% |
| POET Biorefining - Gowrie | POET Biorefining - Gowrie | Gowrie, IA | 2 GWh | Oct 2018 | Dec 2025 | Natural Gas |
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 |