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(A) (1) All structures, including accessory structures, must be elevated on fill so that the lowest floor, as defined, is at or above the regulatory flood protection elevation. In a Zone AE, the finished fill elevation for structures must be no lower than one foot below the regulatory flood protection elevation. In AO zones, the finished fill elevation for structures must be no lower than the depth shown on the Flood Insurance Rate Map for that zone, measured from the highest adjacent grade to the structure. In all zones, the fill must extend at the same elevation at least 15 feet beyond the outside limits of the structure.
(2) As an alternative to elevation on fill, an accessory structure that constitutes a minimal investment and that does not exceed 576 square feet in size may be internally flood proofed in accordance with § 152.033(C).
(B) The cumulative placement of fill or similar material on a parcel must not exceed 1,000 cubic yards, unless the fill is specifically intended to elevate a structure in accordance with division (A) above, or if allowed as a conditional use under § 152.042(C).
(C) The storage of any materials or equipment must be elevated on fill to the regulatory flood protection elevation.
(D) The storage or processing of materials that are, in time of flooding, flammable, explosive, or potentially injurious to human, animal, or plant life is prohibited.
(E) Fill must be properly compacted and the slopes must be properly protected by the use of riprap, vegetative cover or other acceptable method.
(F) All new principal structures must have vehicular access at or above an elevation not more than two feet below the regulatory flood protection elevation. In an AO Zone, all new principal structures must have vehicular access at an elevation not more than one foot below the required elevation of fill for structures in that zone, or must have a flood warning/emergency evacuation plan acceptable to the City Council.
(G) Accessory uses such as yards, railroad tracks, and parking lots may be at an elevation lower than the regulatory flood protection elevation. However, any facilities used by employees or the general public must be designed with a flood warning system that provides adequate time for evacuation if the area is inundated to a depth and velocity such that the depth (in feet) multiplied by the velocity (in feet per second) would exceed a product of four upon occurrence of the regional (1% chance) flood.
(H) Interference with normal manufacturing/industrial plant operations must be minimized, especially along streams having protracted flood durations. In considering permit applications, due consideration must be given to the needs of industries with operations that require a floodplain location.
(I) Flood fringe developments must not adversely affect the hydraulic capacity of the channel and adjoining floodplain of any tributary watercourse or drainage system.
(Ord. 1079, passed 4-14-14)