9th largest plant in Indiana · 295th nationally
Harding Street is a natural gas power plant in Indiana with a nameplate capacity of 1,065 MW. It generates roughly 2.9M MWh per year — enough to power about 276,167 average U.S. homes.
Its capacity factor of 31% reflects intermittent or peaking operation. At 1287 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 (1,065 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 | Harding Street |
|---|---|
| Operator | Aes Indiana |
| City | Indianapolis |
| County | Marion County |
| State | Indiana |
| ZIP | 46217 |
| Coordinates | 39.71132, -86.19687 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 7 | Natural Gas Steam Turbine | Natural Gas | 463 MW | Operating | 1973 |
| GT6 | Natural Gas Fired Combustion Turbine | Natural Gas | 161 MW | Operating | 2002 |
| 5 | Natural Gas Steam Turbine | Natural Gas | 100 MW | Operating | 1958 |
| 6 | Natural Gas Steam Turbine | Natural Gas | 100 MW | Operating | 1961 |
| GT4 | Natural Gas Fired Combustion Turbine | Natural Gas | 83.0 MW | Operating | 1994 |
| GT5 | Natural Gas Fired Combustion Turbine | Natural Gas | 83.0 MW | Operating | 1995 |
| 3 | Petroleum Liquids | Distillate Oil | 43.8 MW | Retired | 1941 |
| 4 | Petroleum Liquids | Distillate Oil | 43.8 MW | Retired | 1947 |
| GT1 | Petroleum Liquids | Distillate Oil | 26.0 MW | Operating | 1973 |
| GT2 | Petroleum Liquids | Distillate Oil | 26.0 MW | Operating | 1973 |
| GT3 | Petroleum Liquids | Distillate Oil | 26.0 MW | Retired | 1973 |
| BAT1 | Batteries | Battery | 20.0 MW | Operating | 2016 |
| IC1 | Petroleum Liquids | Distillate Oil | 2.7 MW | Operating | 1967 |
| CO₂ | 1.9M metric tons |
|---|---|
| SO₂ | 9 metric tons |
| NOₓ | 972 metric tons |
| CO₂ Rate | 1287 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 | RFC |
|---|---|
| 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.