Power plants operated by Public Service Co of Oklahoma
Public Service Co of Oklahoma operates 13 power plants in the 2025 EIA-860 data, with 6,031 MW of nameplate capacity, the 43rd-largest fleet among the 5,826 operators on file. They are spread over two states: Oklahoma and Kansas. Natural gas is 73% of the capacity; the largest site is Northeastern. Its oldest working unit dates from 1952, at Southwestern. Units added from 2020 to 2025 total 963 MW.
- Natural gas4,415 MW73%
- Wind928 MW15%
- Coal473 MW7.8%
- Solar189 MW3.1%
- Oil and petroleum25.4 MW0.4%
Capacity by decade it came online
CoalNatural gasOil and petroleumWindSolar
Above the line: capacity operating in 2025. Below: capacity retired at these plants.
Plants
| Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|
| Northeastern | Oklahoma | Natural gas | 1,478 MW | 1961 |
| Riverside (OK) | Oklahoma | Natural gas | 1,122 MW | 1974 |
| Green Country Power Station | Oklahoma | Natural gas | 904 MW | 2002 |
| Southwestern | Oklahoma | Natural gas | 658 MW | 1952 |
| Tulsa | Oklahoma | Natural gas | 348 MW | 1956 |
| Comanche (OK) | Oklahoma | Natural gas | 294 MW | 1962 |
| Maverick Wind Project, LLC | Oklahoma | Wind | 288 MW | 2021 |
| Sundance Wind Project, LLC | Oklahoma | Wind | 199 MW | 2021 |
| Pixley Solar Energy | Kansas | Solar | 189 MW | 2025 |
| Rock Falls Wind Farm LLC | Oklahoma | Wind | 154 MW | 2017 |
| Flat Ridge 5 | Kansas | Wind | 153 MW | 2025 |
| Flat Ridge 4 | Kansas | Wind | 134 MW | 2025 |
| Weleetka | Oklahoma | Natural gas | 110 MW | 1963 |