231st largest plant in Florida · 4163rd nationally
Seminole Mill is a natural gas power plant in Florida with a nameplate capacity of 30.0 MW. It generates roughly 128.9k MWh per year — enough to power about 12,273 average U.S. homes.
Its capacity factor of 49% puts it in the middle range — running steadily but not full-time. At 638 lb CO₂/MWh, its emission rate sits below the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (30.0 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 | Seminole Mill |
|---|---|
| Operator | Westrock Seminole |
| City | Jacksonville |
| County | Duval County |
| State | Florida |
| ZIP | 32218 |
| Coordinates | 30.41780, -81.59780 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN3 | Natural Gas Steam Turbine | Natural Gas | 30.0 MW | Operating | 1957 |
| CO₂ | 41.1k metric tons |
|---|---|
| NOₓ | 24 metric tons |
| CO₂ Rate | 638 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 | Jea |
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.