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H. A levee, dike or floodwall constructed in the floodway shall not cause an . increase to the 100 -year or regional flood and the technical analysis shall assume equal conveyance or storage loss on both sides of a stream. 331.16 Flood Fringe District Subd. 1. Permitted Uses. Permitted Uses shall be those uses of land or structures listed as Permitted Uses in the underlying zoning use district(s). If no preexisting, underlying zoning use districts exist, then any residential or non-residential structure or use of a structure or land shall be a Permitted Use in the Flood Fringe provided such use does not constitute a public nuisance. All Permitted Uses shall comply with the standards for Flood Fringe "Permitted Uses" listed in this Section and the "Standards for all Flood Fringe Uses" listed in this Subsection. Subd. 2. Standards for Flood Fringe Permitted Uses. A. All structures, including accessory structures, shall be elevated on fill so that the lowest floor including any basement floor is at or above the Regulatory Flood Protection Elevation. The finished fill elevation for structures shall be no lower than one (1) foot below the Regulatory Flood Protection Elevation and the fill shall extend at an elevation of at least fifteen (15) feet beyond the outside limits of the structure erected thereon. B. As an alternative to elevation on fill, accessory structures that constitute a • minimal investment and that do not exceed 500 square feet for the outside dimension at ground level may be internally flood proofed in accordance with this Chapter. C. The cumulative placement of fill where at any one time in excess of one - thousand (1,000) cubic yards of fill is located on the parcel shall be allowable only as a Special Use, unless the fill is specifically intended to elevate a structure in accordance with this Section. D. The storage of any materials or equipment shall be elevated on fill to the Regulatory Flood Protection Elevation. Subd. 3. Special Uses. Any structure that is not elevated on fill or flood proofed in accordance with this Section or any use of land that does not comply with the standards in this Subsection shall only be allowable as a Special Use. An application for a Special Use shall be subject to the standards and criteria and evaluation procedures specified in this Section. Subd. 4. Standards for Flood Fringe Special Uses A. Alternative elevation methods other than the use of fill may be utilized to elevate a structure's lowest floor above the Regulatory Flood Protection . Elevation. These alternative methods may include the use of stilts, pilings, parallel walls, etc., or above -grade, enclosed areas such as crawl spaces or Ordinance 331 Page 8