A. Permitted Uses: Permitted uses shall be those uses of land or structures listed as permitted uses in the underlying zoning use district(s).
B. Standards For Flood Fringe Permitted Uses:
1. All structures, including accessory structures, must be elevated on fill so that the lowest floor including basement floor is at or above the regulatory flood protection elevation. The finished fill elevation for structures shall be no lower than two feet (2’) below the regulatory flood protection elevation, unless protection via floodproofing is provided, and the fill shall extend at such elevation at least fifteen feet (15') beyond the outside limits of the structure erected thereon.
2. As an alternative to elevation on fill, accessory structures that constitute a minimal investment and that do not exceed five hundred (500) square feet at its largest projection may be internally floodproofed in accordance with subsection 12-7-4C4 of this chapter.
3. The storage of any materials or equipment shall be elevated on fill to the regulatory flood protection elevation.
C. Standards For All Flood Fringe Uses:
1. Fill shall be properly compacted and the slopes shall be properly protected by the use of riprap, vegetative cover or other acceptable method. The federal emergency management agency (FEMA) has established criteria for removing the special flood hazard area designation for certain structures properly elevated on fill above the 100-year flood elevation - FEMA's requirements incorporate specific fill compaction and side slope protection standards for multi-structure or multi-lot developments. These standards should be investigated prior to the initiation of site preparation if a change of special flood hazard area designation will be requested.
2. Floodplain developments shall not adversely affect the hydraulic capacity of the channel and adjoining floodplain of any tributary watercourse or drainage system where a floodway or other encroachment limit has not been specified on the official zoning map.
3. Commercial uses: Accessory land uses, such as yards, railroad tracks, and parking lots may be at elevations lower than the regulatory flood protection elevation. However, a permit for such facilities to be used by the employees or the general public shall not be granted in the absence of a flood warning system that provides adequate time for evacuation if the area would be inundated to a depth and velocity such that when multiplying the depth (in feet) times velocity (in feet per second) the product number exceeds four (4) upon occurrence of the regional flood.
4. Manufacturing and industrial uses: Measures shall be taken to minimize interference with normal plant operations especially along streams having protracted flood durations. Certain accessory land uses such as yards and parking lots may be at lower elevations subject to requirements set out in subsection C3 of this section. In considering permit applications, due consideration shall be given to needs of an industry whose business requires that it be located in floodplain areas. (Ord. 439, 11-1-2011; amd. Ord. 556, 4-21-2020)