5th largest plant in Mississippi · 364th nationally
Tva Southaven Combined Cycle is a natural gas power plant in Mississippi with a nameplate capacity of 904 MW. It generates roughly 4.5M MWh per year — enough to power about 428,529 average U.S. homes.
Its capacity factor of 57% puts it in the middle range — running steadily but not full-time. At 822 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 (904 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 | Tva Southaven Combined Cycle |
|---|---|
| Operator | Tennessee Valley Authority |
| City | Southaven |
| County | Desoto County |
| State | Mississippi |
| ZIP | 38671 |
| Coordinates | 34.99390, -90.03780 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | Natural Gas | 179 MW | Operating | 2003 |
| CTG2 | Natural Gas Fired Combined Cycle | Natural Gas | 179 MW | Operating | 2003 |
| CTG3 | Natural Gas Fired Combined Cycle | Natural Gas | 179 MW | Operating | 2003 |
| STG1 | Natural Gas Fired Combined Cycle | Natural Gas | 122 MW | Operating | 2003 |
| STG2 | Natural Gas Fired Combined Cycle | Natural Gas | 122 MW | Operating | 2003 |
| STG3 | Natural Gas Fired Combined Cycle | Natural Gas | 122 MW | Operating | 2003 |
| Owner | Location | Share |
|---|---|---|
| Southaven Power Llc | Southaven, MS | 9000.0% |
| Tennessee Valley Authority | Knoxville, TN | 1000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 1.8M metric tons |
|---|---|
| SO₂ | 9 metric tons |
| NOₓ | 186 metric tons |
| CO₂ Rate | 822 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 | SERC |
|---|---|
| Balancing Authority | Tennessee Valley Authority |
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.