13th largest plant in Indiana · 497th nationally
A B Brown is a coal power plant in Indiana with a nameplate capacity of 707 MW. It generates roughly 1.8M MWh per year — enough to power about 169,825 average U.S. homes.
Its capacity factor of 29% reflects intermittent or peaking operation. At 2431 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | A B Brown |
|---|---|
| Operator | Southern Indiana Gas & Elec Co |
| City | Mount Vernon |
| County | Posey County |
| State | Indiana |
| ZIP | 47620 |
| Coordinates | 37.90530, -87.71500 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Conventional Steam Coal | Bituminous Coal | 265 MW | Retired | 1979 |
| 2 | Conventional Steam Coal | Bituminous Coal | 265 MW | Retired | 1986 |
| 6 | Natural Gas Fired Combustion Turbine | Natural Gas | 249 MW | Under Construction | — |
| 7 | Natural Gas Fired Combustion Turbine | Natural Gas | 249 MW | Under Construction | — |
| 4 | Natural Gas Fired Combustion Turbine | Natural Gas | 88.2 MW | Operating | 1991 |
| 5 | Natural Gas Fired Combustion Turbine | Natural Gas | 88.2 MW | Operating | 2002 |
| CO₂ | 2.2M metric tons |
|---|---|
| SO₂ | 2.7k metric tons |
| NOₓ | 1.1k metric tons |
| CO₂ Rate | 2431 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.. |
Coal plants burn pulverized coal to boil water and spin steam turbines. They emit substantial CO₂, SO₂, and NOₓ along with mercury and particulate matter. Modern units include scrubbers and selective catalytic reduction; older units are increasingly being retired or converted to natural gas as economics shift.