Vectren has filed an application with the Indiana Utility Regulatory Commission seeking approval to construct the natural gas plant, which would be build at the current site of the A.B. Brown power plant in Posey County. The utility would also retire three coal-fired units, including two at the A.B. Brown plant and one at the F.B. Culley plant in Warrick County. It would also relinquish its ownership of one of the Warrick units, which is currently co-owned by Alcoa.