Power plants in the Southwest Power Pool balancing area
The Southwest Power Pool balancing area takes in 713 power plants with 103.2 GW of nameplate capacity, the fourth-largest of the 40 areas covered here. Its plants sit in 14 states, with Oklahoma holding 31% of the capacity. Natural gas makes up 36% of the mix, and the largest plant is Jeffrey Energy Center (2,160 MW). Since 2020, 17.8 GW has come online here, 83% of it wind.
- Natural gas37,382 MW36%
- Wind35,453 MW34%
- Coal20,279 MW20%
- Hydroelectric3,104 MW3.0%
- Oil and petroleum2,381 MW2.3%
- Nuclear2,097 MW2.0%
- Solar1,363 MW1.3%
- Battery storage452 MW0.4%
- Biomass and waste340 MW0.3%
- Pumped-storage hydro259 MW0.3%
- Other sources121 MW0.1%
Capacity by decade it came online
NuclearCoalNatural gasOil and petroleumHydroelectricPumped-storage hydroWindSolarBattery storageBiomass and wasteOther sources
Above the line: capacity operating in 2025. Below: capacity retired at plants that still run.
The 25 largest plants in the area
| Rank | Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|---|
| 1 | Jeffrey Energy Center | Kansas | Coal | 2,160 MW | 1978 |
| 2 | Iatan | Missouri | Coal | 1,754 MW | 1980 |
| 3 | Muskogee | Oklahoma | Natural gas | 1,716 MW | 1977 |
| 4 | Seminole (OK) | Oklahoma | Natural gas | 1,701 MW | 1971 |
| 5 | La Cygne | Kansas | Coal | 1,599 MW | 1973 |
| 6 | Northeastern | Oklahoma | Natural gas | 1,478 MW | 1961 |
| 7 | Redbud Power Plant | Oklahoma | Natural gas | 1,434 MW | 2004 |
| 8 | Nebraska City | Nebraska | Coal | 1,390 MW | 1979 |
| 9 | Gerald Gentleman | Nebraska | Coal | 1,363 MW | 1979 |
| 10 | Wolf Creek Generating Station | Kansas | Nuclear | 1,296 MW | 1985 |
| 11 | Oneta Energy Center | Oklahoma | Natural gas | 1,214 MW | 2002 |
| 12 | GREC | Oklahoma | Natural gas | 1,194 MW | 1985 |
| 13 | Sooner | Oklahoma | Coal | 1,138 MW | 1979 |
| 14 | Tolk | Texas | Coal | 1,136 MW | 1982 |
| 15 | Riverside (OK) | Oklahoma | Natural gas | 1,122 MW | 1974 |
| 16 | Welsh | Texas | Coal | 1,116 MW | 1977 |
| 17 | Harrington | Texas | Natural gas | 1,080 MW | 1976 |
| 18 | Hawthorn | Missouri | Coal | 1,046 MW | 1969 |
| 19 | Great Prairie Wind | Texas | Wind | 1,027 MW | 2022 |
| 20 | Traverse Wind Project, LLC | Oklahoma | Wind | 999 MW | 2022 |
| 21 | Antelope Valley | North Dakota | Coal | 954 MW | 1984 |
| 22 | Green Country Power Station | Oklahoma | Natural gas | 904 MW | 2002 |
| 23 | Pioneer Generation Station | North Dakota | Natural gas | 897 MW | 2013 |
| 24 | Wilkes | Texas | Natural gas | 882 MW | 1964 |
| 25 | Jones | Texas | Natural gas | 860 MW | 1971 |
States
| State | Plants | Capacity |
|---|---|---|
| Oklahoma | 131 | 32.3 GW |
| Kansas | 190 | 21.0 GW |
| Texas | 53 | 13.0 GW |
| Nebraska | 132 | 12.1 GW |
| Missouri | 62 | 8,785 MW |
| North Dakota | 15 | 4,930 MW |
| South Dakota | 30 | 4,305 MW |
| New Mexico | 32 | 2,826 MW |
| Arkansas | 28 | 2,210 MW |
| Louisiana | 4 | 1,050 MW |
| Iowa | 18 | 539 MW |
| Montana | 3 | 168 MW |
Operators with the most capacity
| Operator | Plants | Capacity |
|---|---|---|
| Oklahoma Gas & Electric Co | 18 | 8,611 MW |
| Southwestern Electric Power Co | 12 | 6,640 MW |
| Public Service Co of Oklahoma | 13 | 6,031 MW |
| Evergy Metro | 9 | 5,608 MW |
| Southwestern Public Service Co | 10 | 5,424 MW |
| Evergy Kansas Central, Inc | 15 | 4,745 MW |
| Basin Electric Power Coop | 11 | 3,936 MW |
| Omaha Public Power District | 8 | 3,540 MW |
| Nebraska Public Power District | 12 | 3,008 MW |
| USACE-Omaha | 5 | 2,360 MW |