(A) Residential structures. Within any FW, FF or FA, the lowest floor (including basement) of any new or improved residential structures shall be at least one and one-half feet above the 100-year flood elevation.
(B) Nonresidential structures.
(1) Within any FW, FF or FA, the lowest floor (including basement) shall be at least one and one-half feet above the 100-year flood elevation, or be designed and constructed so that the space enclosed by such structure shall remain either completely or essentially dry during any flood up to that height.
(2) Any structure, or part thereof, which will not be completely or adequately elevated, shall be designed and constructed to be completely or essentially dry in accordance with the standards contained in the publication entitled Flood-Proofing Regulations (U.S. Army Corps of Engineers, June, 1972 as amended March 1992), or some other equivalent standard, for that type of construction.
(C) Space below the lowest floor.
(1) Fully enclosed space below the lowest floor (including basement) is prohibited.
(2) (a) Partially enclosed space below the lowest floor (including basement) which will be used solely for the parking of a vehicle, building access or incidental storage in an area other than a basement, shall be designed and constructed to allow for the automatic entry and exit of floodwaters for the purpose of equalizing hydrostatic forces on exterior walls. The term “partially enclosed space” also includes crawl spaces.
(b) Designs for meeting this requirement must either be certified by a registered professional engineer or architect, or meet or exceed the following minimum criteria:
1. A minimum of two openings having a net total area of not less than one square inch for every square foot of enclosed space;
2. The bottom of all openings shall be no higher than one foot above grade; and
3. Openings may be equipped with screens, louvers and the like, or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.
(D) Accessory structures. Structures accessory to a principal building need not be elevated or floodproofed to remain dry, but shall comply, at a minimum, with the following requirements.
(1) The structure shall not be designed or used for human habitation, but shall be limited to the parking of vehicles, or to the storage of tools, materials and equipment related to the principal use or activity.
(2) Floor area shall not exceed 600 square feet.
(3) The structure will have a low damage potential.
(4) The structure will be located on the site so as to cause the least obstruction to the flow of floodwaters.
(5) Power lines, wiring and outlets will be at least one and one-half feet above the 100-year flood elevation.
(6) Permanently affixed utility equipment and appliances such as furnaces, heaters, washers, dryers and the like are prohibited.
(7) Sanitary facilities are prohibited.
(8) The structure shall be adequately anchored to prevent flotation or movement and shall be designed to automatically provide for the entry and exit of floodwater for the purposes of equalizing hydrostatic forces on the walls. Designs for meeting this requirement must either be certified by a registered engineer or architect, or meet or exceed the following minimum criteria.
(a) A minimum of two openings having a net total area of not less than one square inch for every square foot of enclosed space.
(b) The bottom of all openings shall be no higher than one foot above grade.
(c) Openings may be equipped with screens, louvers and the like or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.
(Ord. 43C, passed 11-1-2001) Penalty, see § 151.999