17 264 Chapter Floodplain Protection NATURAL RESOURCES Franklin Zoning Ordinance Effective July 1, 2024 13. When proposed new construction and substantial improvements are partially located in special flood hazard area, the entire structure shall meet the standards for new construction; and 14. When proposed new construction and substantial improvements are located in multiple flood hazard risk zones or in a flood hazard risk zone with multiple base flood elevations, the entire structure shall comply with the standards for the most hazardous flood hazard risk zone and the highest base flood elevation. B. Specific Standards In addition to the standards set forth in Subsection 17.6.4, Provisions for Flood Hazard Reduction, all areas of special flood hazard shall comply with the following: 1. Residential Structures In AE Zones, where base flood elevation data is available, new construction and substantial improvement of any residential building (or manufactured home) shall have the lowest floor, including basement, elevated to no lower than three feet above the base flood elevation. Should solid foundation perimeter walls be used to elevate a structure, openings sufficient to facilitate equalization of flood hydrostatic forces on both sides of exterior walls shall be provided in accordance with the standards of Clause 17.6.4.B.3, Enclosures, Within approximate A Zones where base flood elevations have not been established and where alternative data is not available, the floodplain administrator shall require the lowest floor of a building to be elevated to a level of at least three feet above the highest adjacent grade. Should solid foundation perimeter walls be used to elevate a structure, openings sufficient to facilitate equalization of flood hydrostatic forces on both sides of exterior walls shall be provided in accordance with the standards of Clause 17.6.4.B.3, Enclosures. 2. Nonresidential Structures a. In AE Zones, where base flood elevation data is available, new construction and substantial improvement of any nonresidential building shall have the lowest floor, including basement, elevated or floodproofed to no lower than one foot above the level of the base flood elevation. Should solid foundation perimeter walls be used to elevate a structure, openings sufficient to facilitate equalization of flood hydrostatic forces on both sides of exterior walls shall be provided in accordance with the standards of Clause 17.6.4.B.3, Enclosures. b. In approximate A Zones, where base flood elevations have not been established and where alternative data is not available, new construction and substantial improvement of any nonresidential building shall have the lowest floor, including basement, elevated or floodproofed to no lower than three feet above the highest adjacent grade. Should solid foundation perimeter walls be used to elevate a structure, openings sufficient to facilitate equalization of flood
RkJQdWJsaXNoZXIy NTY1Mzc2