All of the following conditions must be met prior to the issuance of a building permit for construction of or substantial improvements to any structure in the F-2, floodway fringe district. The property owner/applicant shall provide, with the building permit application, such topographic, engineering, or other data as may be required to determine the effects of the structure or fill on the flow of water or the effects of flooding on the proposed structure, or fill:
A. Structures must be constructed so that the lowest floor, including basement, is elevated one (1) foot above the level of the one hundred (100) year flood;
B. Fill for such structures shall extend at such elevation (subsection (A) of this section) at least fifteen (15) feet at the front and rear and five (5) feet at the sides beyond such structure;
C. No use shall be constructed which will adversely affect the capacity of channels or floodways of any tributary to the main stream, drainage ditch, or any other drainage system by increasing the water surface elevation of the one hundred (100) year flood more than one (1) foot at any point;
D. Construction materials and methods must be used which are flood-resistant and will minimize flood damage;
E. All buildings, structures, mobile homes, equipment, materials, or applicable uses shall be firmly anchored to prevent flotation, collapse, or lateral movement which could damage other structures or restrict bridge openings or other narrow sections of the stream;
F. Waste disposal and water supply facilities shall be modified or protected to eliminate infiltration of floodwaters into such systems and discharges from such systems into the floodwaters; and
G. New construction or substantial improvements of any commercial, industrial, or other nonresidential structure shall either have the lowest floor, including the basement, elevated to the level of the one hundred (100) year flood elevation or, together with utility and sanitary facilities, shall be flood proofed so that the structure is watertight below the one hundred (100) year flood level, with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads, as well as the effects of buoyancy. A registered professional engineer or architect shall certify in writing at the time of the submission of the building permit application that these standards will be met by the proposal.
(Code 1991, § 12-354)