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 |
|---|---|---|---|---|---|---|
| Merom | Hallador Power Company, LLC | Sullivan, IN | 5 TWh | Jan 1982 | Oct 2025 | Bituminous Coal : 99.8% |
| Taft Cogeneration Facility | Occidental Chemical Corporation | Hahnville, LA | 5 TWh | Jun 2002 | Oct 2025 | Natural Gas : 98.8% Other Gas : 1.2% |
| AES Petersburg | AES Indiana | Petersburg, IN | 5 TWh | May 1967 | Oct 2025 | Bituminous Coal : 99.8% |
| Cottonwood Energy Company LP | NRG Cottonwood Tenant LLC | Deweyville, TX | 5 TWh | Jun 2003 | Oct 2025 | Natural Gas |
| Zeeland Generating Station | Consumers Energy Co - (MI) | Zeeland, MI | 5 TWh | May 2001 | Oct 2025 | Natural Gas |
| Independence Steam Electric Station | Entergy Arkansas LLC | Newark, AR | 6 TWh | Dec 1982 | Oct 2025 | Subbituminous Coal : 99.8% |
| Eagle Valley (IN) | AES Indiana | Martinsville, IN | 6 TWh | Nov 1951 | Oct 2025 | Natural Gas |
| Plaquemine Cogeneration Plant | Dow Chemical Co | Plaquemine, LA | 6 TWh | Feb 2004 | Oct 2025 | Natural Gas : 97.7% Other Gas : 2.3% |
| St. Charles Power Station (LA) | Entergy Louisiana LLC | La Place, LA | 6 TWh | Apr 2019 | Oct 2025 | Natural Gas |
| Clay Boswell | ALLETE, Inc. | Cohasset, MN | 6 TWh | Jun 1958 | Oct 2025 | Subbituminous Coal : 99.7% |
| Acadia Energy Center | Cleco Power LLC | Eunice, LA | 6 TWh | Jun 2002 | Oct 2025 | Natural Gas |
| Montgomery County | Entergy Texas Inc. | Willis, TX | 6 TWh | Dec 2020 | Oct 2025 | Natural Gas |
| Walter Scott Jr Energy Center | MidAmerican Energy Co | Council Bluffs, IA | 6 TWh | Feb 1954 | Oct 2025 | Subbituminous Coal : 99.0% Distillate Fuel Oil : 0.8% |
| Lake Charles Power | Entergy Louisiana LLC | West Lake, LA | 6 TWh | Feb 2020 | Oct 2025 | Natural Gas |
| Columbia (WI) | Wisconsin Power & Light Co | Pardeville, WI | 6 TWh | Apr 1975 | Oct 2025 | Subbituminous Coal : 99.9% |
| Baldwin Energy Complex | Dynegy Midwest Generation Inc | Baldwin, IL | 7 TWh | Jun 1970 | Oct 2025 | Subbituminous Coal : 99.8% |
| River Bend | Entergy Louisiana LLC | St. Francisville, LA | 7 TWh | May 1986 | Oct 2025 | Nuclear |
| Port Washington Generating Station | Wisconsin Electric Power Co | Port Washington, WI | 7 TWh | Jun 2005 | Oct 2025 | Natural Gas |
| Sherburne County | Northern States Power Co - Minnesota | Becker, MN | 7 TWh | Mar 1976 | Oct 2025 | Subbituminous Coal : 99.9% |
| Elm Road Generating Station | Wisconsin Electric Power Co | Oak Creek, WI | 7 TWh | Jan 2010 | Oct 2025 | Subbituminous Coal : 79.4% Bituminous Coal : 17.5% Natural Gas : 3.1% |
| Belle River | DTE Electric Company | China Twp, MI | 8 TWh | Oct 1981 | Sep 2025 | Subbituminous Coal : 93.6% Natural Gas : 6.0% |
| Callaway | Union Electric Co - (MO) | Fulton, MO | 8 TWh | Nov 1984 | Oct 2025 | Nuclear |
| Prairie Island | Northern States Power Co - Minnesota | Welch, MN | 8 TWh | Jan 1974 | Oct 2025 | Nuclear |
| Nine Mile Point | Entergy Louisiana LLC | Westwego, LA | 8 TWh | Oct 1955 | Oct 2025 | Natural Gas |
| Waterford 3 | Entergy Louisiana LLC | Killona, LA | 8 TWh | Aug 1985 | Oct 2025 | Nuclear |
| J H Campbell | Consumers Energy Co - (MI) | West Olive, MI | 8 TWh | Sep 1962 | Oct 2025 | Subbituminous Coal : 99.8% |
| Coal Creek | Rainbow Energy Center | Underwood, ND | 8 TWh | May 1979 | Oct 2025 | Refined Coal : 99.9% |
| Clinton Power Station | Constellation Nuclear | Clinton, IL | 8 TWh | Oct 1987 | Oct 2025 | Nuclear |
| Blue Water Energy Center | DTE Electric Company | East China, MI | 8 TWh | May 2022 | Oct 2025 | Natural Gas |
| Union Power Station | Entergy Arkansas LLC | El Dorado, AR | 9 TWh | Dec 2002 | Oct 2025 | Natural Gas |
| Midland Cogeneration Venture | Midland Cogeneration Venture | Midland, MI | 10 TWh | May 1989 | Oct 2025 | Natural Gas |
| Fermi | DTE Electric Company | Frenchtown Twp, MI | 10 TWh | Mar 1966 | Oct 2025 | Nuclear |
| Point Beach Nuclear Plant | NextEra Energy Point Beach LLC | Two Rivers, WI | 10 TWh | May 1969 | Oct 2025 | Nuclear |
| Gibson | Duke Energy Indiana, LLC | Owensville, IN | 11 TWh | Mar 1975 | Oct 2025 | Bituminous Coal : 99.6% |
| Prairie State Generating Station | Prairie State Generating Co LLC | Marissa, IL | 11 TWh | May 2012 | Oct 2025 | Bituminous Coal : 99.8% |
| Grand Gulf | System Energy Resources, Inc | Port Gibson, MS | 11 TWh | Jun 1985 | Oct 2025 | Nuclear |
| Arkansas Nuclear One | Entergy Arkansas LLC | Russellville, AR | 15 TWh | Nov 1974 | Oct 2025 | Nuclear |
| Labadie | Union Electric Co - (MO) | Labadie, MO | 16 TWh | May 1970 | Oct 2025 | Subbituminous Coal : 99.9% |
| Monroe (MI) | DTE Electric Company | Monroe, MI | 16 TWh | Oct 1969 | Oct 2025 | Subbituminous Coal : 74.1% Bituminous Coal : 16.5% Petroleum Coke : 9.1% |
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 |