The Columbia Planning and Zoning Commission rejected the rezoning and preliminary plat for a residential development near Rock Bridge State Park. COLUMBIA â The Columbia Planning and Zoning Commission rejected the rezoning and preliminary plat for a residential development near Rock Bridge State Park. The Commission voted 7-1 against the plan from land developer Rob Hill on the proposed housing design. The plan involves building 113 single family homes on about 65 acres of land near East Gans Road.  The plan has been met with opposition from Friends of Rock Bridge Memorial State Park. Friends of Rock Bridge Memorial State Park's president, Kevin Roberson, said there's a clear need for development in Columbia but not at the state park.