10th largest plant in Tennessee · 322nd nationally
John Sevier is a natural gas power plant in Tennessee with a nameplate capacity of 997 MW. It generates roughly 4.3M MWh per year — enough to power about 407,670 average U.S. homes.
Its capacity factor of 49% puts it in the middle range — running steadily but not full-time. At 881 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 (997 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 | John Sevier |
|---|---|
| Operator | Tennessee Valley Authority |
| City | Rogersville |
| County | Hawkins County |
| State | Tennessee |
| ZIP | 37857 |
| Coordinates | 36.37670, -82.96390 |
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 | 423 MW | Operating | 2012 |
| 1 | Conventional Steam Coal | Bituminous Coal | 200 MW | Retired | 1955 |
| 2 | Conventional Steam Coal | Bituminous Coal | 200 MW | Retired | 1955 |
| 3 | Conventional Steam Coal | Bituminous Coal | 200 MW | Retired | 1956 |
| 4 | Conventional Steam Coal | Bituminous Coal | 200 MW | Retired | 1957 |
| CTG1 | Natural Gas Fired Combined Cycle | Natural Gas | 191 MW | Operating | 2012 |
| CTG2 | Natural Gas Fired Combined Cycle | Natural Gas | 191 MW | Operating | 2012 |
| CTG3 | Natural Gas Fired Combined Cycle | Natural Gas | 191 MW | Operating | 2012 |
| CO₂ | 1.9M metric tons |
|---|---|
| SO₂ | 10 metric tons |
| NOₓ | 159 metric tons |
| CO₂ Rate | 881 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.