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 |
|---|---|---|---|---|---|---|
| Scandia CSG | Madison Energy Investments LLC | Scandia, MN | 9 GWh | Dec 2017 | Sep 2025 | Solar |
| Sherburne North Project CSG | Madison Energy Investments LLC | St. Cloud, MN | 8 GWh | Jun 2018 | Sep 2025 | Solar |
| Big Lake Project CSG | Madison Energy Investments LLC | Big Lake, MN | 9 GWh | May 2018 | Sep 2025 | Solar |
| Cottage Grove Project CSG | Madison Energy Investments LLC | Cottage Grove, MN | 6 GWh | Sep 2018 | Sep 2025 | Solar |
| DIVOCSG 11 - Sherburne | Madison Energy Investments LLC | Clear Lake, MN | 713 MWh | May 2024 | Dec 2025 | Solar |
| Strix Solar | Madison Gas & Electric Co | Fitchburg, WI | 9 GWh | Dec 2024 | Dec 2025 | Solar |
| Tyto Solar | Madison Gas & Electric Co | Fitchburg, WI | 11 GWh | Jan 2024 | Dec 2025 | Solar |
| O'Brien Solar Fields | Madison Gas & Electric Co | Fitchburg, WI | 37 GWh | Apr 2021 | Dec 2025 | Solar |
| Hermsdorf Solar | Madison Gas & Electric Co | Madison, WI | 16 GWh | Feb 2022 | Dec 2025 | Solar |
| Wind Turbine | Madison Gas & Electric Co | Casco, WI | 12 GWh | May 1999 | Dec 2025 | Wind |
| Blount Street | Madison Gas & Electric Co | Madison, WI | 59 GWh | May 1957 | Dec 2025 | Natural Gas |
| Diesel Generators | Madison Gas & Electric Co | Madison, WI | 1 GWh | May 2001 | Jul 2026 | Distillate Fuel Oil |
| West Marinette 34 | Madison Gas & Electric Co | Peshtigo, WI | 85 GWh | May 2000 | Dec 2025 | Natural Gas |
| Sycamore (WI) | Madison Gas & Electric Co | Madison, WI | 28 MWh | Nov 1967 | Dec 2025 | Natural Gas |
| Top of Iowa Windfarm III | Madison Gas & Electric Co | Kensett, IA | 40 GWh | Jan 2008 | Dec 2025 | Wind |
| West Campus Cogeneration Facility | Madison Gas & Electric Co | Madison, WI | 305 GWh | Mar 2005 | Dec 2025 | Natural Gas |
| Nine Springs | Madison Gas & Electric Co | Madison, WI | 89 MWh | Nov 1964 | Dec 2025 | Natural Gas |
| Middleton Airport Solar | Madison Gas & Electric Co | Middleton, WI | 7 GWh | Jun 2020 | Dec 2025 | Solar |
| Dane County Airport Solar | Madison Gas & Electric Co | Madison, WI | 17 GWh | Nov 2020 | Dec 2025 | Solar |
| Saratoga Wind Farm | Madison Gas & Electric Co | Lime Springs, IA | 255 GWh | Jan 2019 | Jul 2026 | Wind |
| Magnolia Power | Magnolia Power Holdings LLC | Plaquemine, LA | 3 TWh | Nov 2025 | Jul 2026 | Natural Gas |
| Custer Energy Center | Manitowoc Public Utilities | Manitowoc, WI | 4 GWh | May 1999 | Dec 2025 | Natural Gas |
| Manitowoc | Manitowoc Public Utilities | Manitowoc, WI | 185 GWh | May 1955 | Jul 2026 | Wood/Wood Waste Solids : 80.7% Petroleum Coke : 9.9% Bituminous Coal : 9.1% |
| Mapleton Community Solar | Mapleton Community Solar | Mapleton, MN | 5 GWh | May 2017 | Dec 2025 | Solar |
| Marion Solar LNG | Marion Solar LLC | Indianapolis, IN | 2 GWh | Sep 2015 | Dec 2025 | Solar |
| Belmont | Marion Solar LLC | Indianapolis, IN | 5 GWh | Oct 2015 | Dec 2025 | Solar |
| Marlow Solar, LLC CSG | Marlow Solar, LLC | Bluford, IL | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| Marshall Solar Energy Project | Marshall Solar Energy Project | Marshall, MN | 97 GWh | Dec 2016 | Jul 2026 | Solar |
| Marshall Wind 2 LLC | Marshall Wind Farm, LLC | Marshall, MN | 5 GWh | Nov 2007 | Nov 2025 | Wind |
| Marshall Wind 3 LLC | Marshall Wind Farm, LLC | Marshall, MN | 4 GWh | Nov 2007 | Dec 2025 | Wind |
| Marshall Wind 4 LLC | Marshall Wind Farm, LLC | Marshall, MN | 4 GWh | Nov 2007 | Dec 2025 | Wind |
| Marshall Wind 5 LLC | Marshall Wind Farm, LLC | Marshall, MN | 2 GWh | Nov 2007 | Dec 2025 | Wind |
| Marshall Wind 6 LLC | Marshall Wind Farm, LLC | Marshall, MN | 3 GWh | Nov 2007 | Dec 2025 | Wind |
| Marshall Wind 1 LLC | Marshall Wind Farm, LLC | Marshall, MN | 1 GWh | Nov 2007 | Dec 2025 | Wind |
| Maston Garden Solar | Maston Garden LLC | Kasson, MN | 2 GWh | Apr 2020 | Dec 2025 | Solar |
| May Shannon Solar, LLC | May Shannon Solar, LLC | Clio, MI | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| McDonough Solar 1, LLC CSG | McDonough Solar 1, LLC | Blandinsville, IL | 4 GWh | Nov 2020 | Dec 2025 | Solar |
| Combined Locks Energy Center | McKinley Paper | Combined Locks, WI | 364 GWh | Apr 2002 | Oct 2025 | Natural Gas |
| Indiana Crossroads Solar Park | Meadow Lake Solar Park | Reynolds, IN | 380 GWh | May 2023 | Jul 2026 | Solar |
| Meadow Lake Wind Farm VI LLC | Meadow Lake Wind Farm VI LLC | Remington, IN | 663 GWh | Oct 2018 | Jul 2026 | Wind |
| Meadow Ridge | Meadow Ridge Wind Energy, LLC | Greenfield, IA | 2 GWh | Jun 2012 | Dec 2025 | Wind |
| New Frontier Wind | Meadowlark Wind I LLC | Ruso, ND | 381 GWh | Nov 2018 | Jul 2026 | Wind |
| Mankato Energy Center | MEC Holdings, LLC | Mankato, MN | 3 TWh | Jun 2006 | Dec 2025 | Natural Gas |
| Medin 2 Community Solar LLC CSG | Medin 2 Community Solar LLC | Center City, MN | 2 GWh | Jul 2021 | Dec 2025 | Solar |
| Melrose 2 | Melrose Public Utilities | Melrose, MN | 4 MWh | Feb 2014 | Dec 2025 | Distillate Fuel Oil |
| Melrose | Melrose Public Utilities | Melrose, MN | 71 MWh | Jun 1945 | Dec 2025 | Distillate Fuel Oil |
| St. Paul Intl Airport Red & Blue Parking | Metropolitan Airports Commission | St. Paul, MN | 2 GWh | Nov 2015 | Jun 2026 | Solar |
| Michelangelo Wind 3 LLC | Michelangelo Wind 3 LLC | Huxley, IA | 10 GWh | Jan 2017 | Dec 2025 | Wind |
| Michigan Power LP | Michigan Power Limited Partnership | Ludington, MI | 1 TWh | Sep 1995 | Dec 2025 | Natural Gas |
| Kalkaska CT #1 | Michigan Public Power Agency | Kalkaska, MI | 58 GWh | Nov 2002 | Dec 2025 | Natural Gas |
| T B Simon Power Plant | Michigan State University | East Lansing, MI | 274 GWh | Nov 1965 | Jul 2026 | Natural Gas |
| MSC Croswell | Michigan Sugar Company | Croswell, MI | 36 MWh | Sep 1948 | Jan 2025 | Natural Gas |
| MSC Sebewaing | Michigan Sugar Company | Sebewaing, MI | 509 MWh | Sep 1979 | Mar 2026 | Bituminous Coal : 67.9% Natural Gas : 32.1% |
| Michigan Wind 1 | Michigan Wind 1, LLC | Ubly, MI | 165 GWh | Nov 2008 | Dec 2025 | Wind |
| Michigan Wind 2 | Michigan Wind 2, LLC | Minden City, MI | 329 GWh | Nov 2011 | Dec 2025 | Wind |
| Victory Wind Farm | MidAmerican Energy Co | Westside, IA | 384 GWh | Nov 2006 | Dec 2025 | Wind |
| Century | MidAmerican Energy Co | Blairsburg, IA | 609 GWh | Aug 2005 | Dec 2025 | Wind |
| Pleasant Hill | MidAmerican Energy Co | Pleasant Hill, IA | 49 GWh | May 1990 | Dec 2025 | Natural Gas |
| Intrepid | MidAmerican Energy Co | Schaller, IA | 546 GWh | Nov 2004 | Dec 2025 | Wind |
| Moline | MidAmerican Energy Co | Moline, IL | 21 GWh | Dec 1941 | Dec 2025 | Water : 97.0% Natural Gas : 3.0% |
| George Neal South | MidAmerican Energy Co | Salix, IA | 2 TWh | Jun 1979 | Jul 2026 | Subbituminous Coal : 99.0% Distillate Fuel Oil : 1.0% |
| Greater Des Moines | MidAmerican Energy Co | Pleasant Hill, IA | 2 TWh | Apr 2003 | Dec 2025 | Natural Gas |
| Sycamore (IA) | MidAmerican Energy Co | Johnston, IA | 30 GWh | Jul 1974 | Dec 2025 | Natural Gas |
| Shenandoah | MidAmerican Energy Co | Shenandoah, IA | 323 MWh | Mar 2000 | Dec 2025 | Distillate Fuel Oil |
| River Hills | MidAmerican Energy Co | Des Moines, IA | 2 GWh | Apr 1966 | Dec 2025 | Natural Gas |
| George Neal North | MidAmerican Energy Co | Sergeant Bluff, IA | 2 TWh | Apr 1964 | Jul 2026 | Subbituminous Coal : 98.2% Natural Gas : 1.8% |
| Merl Parr | MidAmerican Energy Co | Charles City, IA | 3 GWh | Apr 1969 | Dec 2025 | Natural Gas |
| Carroll Wind Farm | MidAmerican Energy Co | Carroll, IA | 557 GWh | Nov 2008 | Dec 2025 | Wind |
| Pomeroy Wind Farm | MidAmerican Energy Co | Fonda, IA | 961 GWh | Nov 2007 | Jul 2026 | Wind |
| Adair Wind Farm | MidAmerican Energy Co | Adair, IA | 551 GWh | Nov 2008 | Dec 2025 | Wind |
| Walnut Wind Farm | MidAmerican Energy Co | Walnut, IA | 558 GWh | Nov 2008 | Dec 2025 | Wind |
| Walter Scott Jr Energy Center | MidAmerican Energy Co | Council Bluffs, IA | 7 TWh | Feb 1954 | Jul 2026 | Subbituminous Coal : 99.3% Distillate Fuel Oil : 0.6% |
| Coralville GT | MidAmerican Energy Co | Coralville, IA | 2 GWh | May 1970 | Dec 2025 | Natural Gas |
| Charles City Wind Farm | MidAmerican Energy Co | Charles City, IA | 268 GWh | Mar 2008 | Dec 2025 | Wind |
| Louisa | MidAmerican Energy Co | Muscatine, IA | 4 TWh | Sep 1983 | Jul 2026 | Subbituminous Coal : 99.4% Natural Gas : 0.6% |
| Electrifarm | MidAmerican Energy Co | Waterloo, IA | 17 GWh | Apr 1975 | Dec 2025 | Natural Gas |
| Knoxville Industrial | MidAmerican Energy Co | Knoxville, IA | 225 MWh | Mar 2000 | Dec 2025 | Distillate Fuel Oil |
| Waterloo Lundquist | MidAmerican Energy Co | Waterloo, IA | 255 MWh | Mar 2000 | Dec 2025 | Distillate Fuel Oil |
| Holliday Creek Solar | MidAmerican Energy Co | Fort Dodge, IA | 206 GWh | Jun 2022 | Jul 2026 | Solar |
| Chickasaw Wind Farm | MidAmerican Energy Co | New Hampton, IA | 640 GWh | Nov 2023 | Jul 2026 | Wind |
| Waterloo Solar (IA) | MidAmerican Energy Co | Waterloo, IA | 6 GWh | Feb 2022 | Dec 2025 | Solar |
| Arbor Hill Solar | MidAmerican Energy Co | Greenfield, IA | 46 GWh | Dec 2021 | Jul 2026 | Solar |
| Neal Energy Center Solar | MidAmerican Energy Co | Salix, IA | 7 GWh | Jan 2022 | Dec 2025 | Solar |
| Shenandoah Hills Wind Farm | MidAmerican Energy Co | Blanchard, IA | 405 GWh | Nov 2025 | Jul 2026 | Wind |
| Johnson County Hills Solar | MidAmerican Energy Co | Iowa City, IA | 6 GWh | Dec 2021 | Dec 2025 | Solar |
| Franklin County Solar | MidAmerican Energy Co | Hampton, IA | 13 GWh | Dec 2021 | Dec 2025 | Solar |
| Plymouth Wind | MidAmerican Energy Co | Remsen, IA | 759 GWh | Dec 2021 | Jul 2026 | Wind |
| Contrail Wind Farm | MidAmerican Energy Co | Bedford, IA | 340 GWh | Nov 2020 | Jul 2026 | Wind |
| Southern Hills Wind Farm | MidAmerican Energy Co | Creston, IA | 809 GWh | Feb 2021 | Jul 2026 | Wind |
| Orient Wind Farm | MidAmerican Energy Co | Orient, IA | 2 TWh | Nov 2018 | Jul 2026 | Wind |
| Diamond Trail Wind Farm | MidAmerican Energy Co | Ladora, IA | 842 GWh | Nov 2020 | Jul 2026 | Wind |
| Beaver Creek Wind | MidAmerican Energy Co | Ogden, IA | 1 TWh | Nov 2017 | Jul 2026 | Wind |
| Palo Alto Wind Farm | MidAmerican Energy Co | Emmetsburg, IA | 1 TWh | Dec 2019 | Jul 2026 | Wind |
| Prairie Wind Farm | MidAmerican Energy Co | Montezuma, IA | 606 GWh | Dec 2017 | Jul 2026 | Wind |
| Eclipse Wind Farm | MidAmerican Energy Co | Adair, IA | 820 GWh | Aug 2012 | Jul 2026 | Wind |
| Vienna Wind Farm | MidAmerican Energy Co | Marshalltown, IA | 622 GWh | Oct 2012 | Dec 2025 | Wind |
| Morning Light Wind Farm | MidAmerican Energy Co | Adair, IA | 407 GWh | Sep 2012 | Dec 2025 | Wind |
| Ida Grove Wind | MidAmerican Energy Co | Ida Grove, IA | 1 TWh | Aug 2016 | Dec 2025 | Wind |
| O'Brien Wind | MidAmerican Energy Co | Primghar, IA | 851 GWh | Aug 2016 | Dec 2025 | Wind |
| Ida Grove II | MidAmerican Energy Co | Ida Grove, IA | 686 GWh | Nov 2019 | Jul 2026 | Wind |
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 |