An overlay district is a regulatory tool that creates a special zoning district placed over an existing base zoning. For instance, our downtown area is in a Historic Overlay District. While we will have an underlying zoning of C-3, the overlay will define special provisions, like additional uses or height restrictions that are in addition to what is defined in the base zoning of C-3. We currently have five active overlay districts in the city. The UDC will define seven overlay districts; Scenic Interstate, Entrance Corridor, River Road, Historic, Heritage, Downtown and SoBo.