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The A. B. Brown Generating Station is a four-unit, 700 megawatt (MW) power plant, located on the northern bank of Ohio River, 8 miles (10 km) east of Mount Vernon, Indiana and 5 miles (8 km) southwest of Evansville, Indiana just west of the Posey-Vanderburgh County Line.[1] Each of the two coal-fired units has a name-plate capacity of 265.2 MW. Bituminous coal is used as a primary fuel type, which can be substituted for natural gas.[2] There are also two gas turbine units, 88.2 MW of nameplate capacity each. The facility is owned by Vectren (formerly Southern Indiana Gas and Electric Company).[3]

A. B. Brown Generating Station
A.B. Brown Generating Station in 2011
Location of the A. B. Brown Generating Station in Indiana
CountryUnited States
LocationMarrs Township, Posey County, near Mount Vernon, Indiana
Coordinates37°54′20″N 87°42′54″W / 37.90556°N 87.71500°W / 37.90556; -87.71500Coordinates: 37°54′20″N 87°42′54″W / 37.90556°N 87.71500°W / 37.90556; -87.71500
Commission dateUnit 1 (coal): March, 1979
Unit 2 (coal): Feb, 1986
Unit 3 (gas): June, 1991
Unit 4 (gas): May, 2002
Thermal power station
Primary fuelBituminous coal
Secondary fuelNatural gas
Turbine technologySteam
Combustion gas turbine
Power generation
Nameplate capacity700 MW


Environmental impactEdit

Emission controlEdit

In 1979, Unit 1 was constructed with a dual-alkali scrubber to help reduce sulphur dioxide (SO
) emissions. In 1986, was completed and also uses a dual-alkali scrubber. From 2001 to 2005, Vectren installed four selective catalytic reduction (SCR) devices on all of the coal-fired units, which successfully cut nitrogen oxide (NO
) emissions by 80 percent. In 2004, Vectren replaced an existing electrostatic precipitator at Unit 1 with a fabric filter. The investment increased the particulate matter removal efficiency to 99 percent at that unit.

Ash pondsEdit

The A. B. Brown Station ash management impoundment was formed by building a dam to block off the outlet of a natural ravine about 0.5 miles (0.8 km) from the Ohio river. The ash pond consists of two dams. The Lower dam (built in 1978) has been classified by the Indiana DNR as a Significant Hazard (State ID#65-7, permit #D-4405, rev 1). The Upper dam (constructed in two phases in 2002 and 2007) was not classified, but has a permit #FW-21909. Liquid wastes being sluiced into the pond include fly ash, bottom ash, boiler slag, FGD belt filter wash down and water sump wastes, pyrites, material removed from the coal pile run-off pond, plant floor drain wash downs, boiler chemical leaning wastes, reverse osmosis system rejects, and rainfall/runoff from the surrounding area. According to Vectren, no discernible amount of material has been removed from the pond since it first began operation in 1978.[4]

See alsoEdit


  1. ^ "Southern Indiana Gas and Electric Company". Statement by a Holding Company Claiming Exemption, Form U-3A-2. U.S. Securities and Exchange Commission. February 29, 1996. Retrieved July 14, 2008.
  2. ^ "Existing Electric Generating Units in the United States, 2006" (Excel). Energy Information Administration, U.S. Department of Energy. 2006. Archived from the original on June 16, 2008. Retrieved July 14, 2008.
  3. ^ White, Beth (May 30, 2006). "Vectren considers installing new pollution control equipment at AB Brown Power Plant". Channel 14 News. Retrieved July 14, 2008.
  4. ^ Angila M. Retherford (2009). "Vectren - A.B. Brown Power Station and F.B. Culley Power Station Coal Ash Survey" (PDF). U.S. EPA. Archived from the original (PDF) on February 4, 2011. Retrieved December 6, 2009.