90th largest plant in Illinois · 2040th nationally
Interstate is a natural gas power plant in Illinois with a nameplate capacity of 139 MW. It generates roughly 39.5k MWh per year — enough to power about 3,763 average U.S. homes.
Its capacity factor of 3% reflects intermittent or peaking operation. At 1550 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | Interstate |
|---|---|
| Operator | City Of Springfield - (Il) |
| City | Springfield |
| County | Sangamon County |
| State | Illinois |
| ZIP | 62707 |
| Coordinates | 39.82330, -89.58910 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | Natural Gas | 139 MW | Operating | 1997 |
| CO₂ | 30.6k metric tons |
|---|---|
| NOₓ | 38 metric tons |
| CO₂ Rate | 1550 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 | Midcontinent Independent Transmission System Operator, Inc.. |
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.