All new construction or substantial improvements in the Flood Fringe Overlay District shall conform to the following requirements.
(A) The lowest floor, including basement, of residential structures shall be elevated to or above one-foot above the base flood elevation.
(B) The lowest floor, including basement, of non-residential structures shall be elevated to or above one-foot above the base flood elevation or, together with attendant utility and sanitary facilities, shall be flood proofed so that below that level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. A registered professional engineer or architect shall certify that the standards of this subsection (f) of this article are satisfied. Such certification shall be provided to the Development Services Director as set forth in § 25-19-18(B)(7) of this article.
(C) Fully enclosed areas below the lowest floor that are usable solely for parking of vehicles, building access, or storage in an area other than a basement and which are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or meet or exceed the following minimum criteria: A minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided. The bottom of all openings shall be not higher than one-foot above grade. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
(D) Within AH Districts, adequate drainage paths around structures on slopes shall be required in order to guide floodwaters around and away from proposed structures.
(Ord. 3639, passed - -2000)