6th largest plant in Oklahoma · 233rd nationally
Oneta Energy Center is a natural gas power plant in Oklahoma with a nameplate capacity of 1,214 MW. It generates roughly 5.6M MWh per year — enough to power about 535,385 average U.S. homes.
Its capacity factor of 53% puts it in the middle range — running steadily but not full-time. At 893 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (1,214 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Oneta Energy Center |
|---|---|
| Operator | Oneta Power Llc |
| City | Broken Arrow |
| County | Wagoner County |
| State | Oklahoma |
| ZIP | 74014 |
| Coordinates | 36.01190, -95.69670 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| STG1 | Natural Gas Fired Combined Cycle | Natural Gas | 255 MW | Operating | 2002 |
| STG2 | Natural Gas Fired Combined Cycle | Natural Gas | 255 MW | Operating | 2003 |
| CTG1 | Natural Gas Fired Combined Cycle | Natural Gas | 176 MW | Operating | 2002 |
| CTG2 | Natural Gas Fired Combined Cycle | Natural Gas | 176 MW | Operating | 2002 |
| CTG3 | Natural Gas Fired Combined Cycle | Natural Gas | 176 MW | Operating | 2003 |
| CTG4 | Natural Gas Fired Combined Cycle | Natural Gas | 176 MW | Operating | 2003 |
| CO₂ | 2.5M metric tons |
|---|---|
| SO₂ | 13 metric tons |
| NOₓ | 762 metric tons |
| CO₂ Rate | 893 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | MRO |
|---|---|
| Balancing Authority | Southwest Power Pool |
Natural gas plants are the workhorse of the modern grid. Combined-cycle units achieve very high efficiency and can ramp up and down quickly to balance variable renewables. They emit roughly half the CO₂ per MWh of coal and far less of other pollutants, but they still release upstream methane during fuel extraction.