10-1-20: STANDARDS FOR FLOODPLAINS WITHOUT ESTABLISHED BASE FLOOD ELEVATIONS:
Within the SFHAs designated as Zone A (also known as Unnumbered A Zones) and established in section 10-1-6 of this chapter, where no BFE data has been provided by FEMA, the following provisions, in addition to the provisions of section 10-1-18 of this chapter, shall apply. The BFE used in determining the FPE shall be determined based on the following criteria:
   A.   When BFE data is available from other sources, all new construction and substantial improvements within such areas shall also comply with all applicable provisions of this chapter and shall be elevated or floodproofed in accordance with standards in sections 10-1-18 and 10-1-19 of this chapter.
   B.   When floodway or flood fringe data is available from a Federal, State, or other source, all new construction and substantial improvements within floodway and flood fringe areas shall also comply with the requirements of section 10-1-19 of this chapter.
   C.   All subdivision, manufactured home park, and other development proposals shall provide BFE data if development is greater than five (5) acres or has more than fifty (50) lots/manufactured home sites. Such BFE data shall be adopted by reference in accordance with section 10-1-6 of this chapter and utilized in implementing this chapter.
   D.   When BFE data is not available from a Federal, State, or other source as outlined above, the reference level shall be elevated or floodproofed (non-residential) to two feet (2.0') above the highest adjacent grade (HAG) at the building site or to the FPE whichever is higher, as defined in section 10-1-4 of this chapter. All other applicable provisions of section 10-1-19 of this chapter shall also apply. (Ord. 269, 12-14-2016)