10th largest plant in Missouri · 514th nationally
State Line Combined Cycle is a natural gas power plant in Missouri with a nameplate capacity of 691 MW. It generates roughly 2.3M MWh per year — enough to power about 219,589 average U.S. homes.
Its capacity factor of 38% reflects intermittent or peaking operation. At 848 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 (691 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 | State Line Combined Cycle |
|---|---|
| Operator | Empire District Electric Co |
| City | Joplin |
| County | Jasper County |
| State | Missouri |
| ZIP | 64804 |
| Coordinates | 37.06590, -94.61400 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 2-3 | Natural Gas Fired Combined Cycle | Natural Gas | 207 MW | Operating | 2001 |
| 2-1 | Natural Gas Fired Combined Cycle | Natural Gas | 181 MW | Operating | 2001 |
| 2-2 | Natural Gas Fired Combined Cycle | Natural Gas | 180 MW | Operating | 1997 |
| 1 | Natural Gas Fired Combustion Turbine | Natural Gas | 123 MW | Operating | 1995 |
| Owner | Location | Share |
|---|---|---|
| Empire District Electric Co | Joplin, MO | 6000.0% |
| Evergy Kansas Central, Inc | Topeka, KS | 4000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 978.1k metric tons |
|---|---|
| SO₂ | 5 metric tons |
| NOₓ | 113 metric tons |
| CO₂ Rate | 848 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.