(A) Residential structures. Within any identified floodplain area, any new construction or substantial improvement of a residential structure shall have the lowest floor (including basement) elevated up to, or above, the regulatory flood elevation.
(B) Nonresidential structures.
(1) Within any identified floodplain area, any new construction or substantial improvement of a nonresidential structure shall have the lowest floor (including basement) elevated up to, or above, the regulatory 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 nonresidential structure, or part thereof, having a lowest floor which is not elevated to at least two feet above the 100-year flood elevation, shall be flood-proofed in a completely or essentially dry manner in accordance with the W1 or W2 space classification standards contained in the publication entitled Flood-Proofing Regulations published by the U.S. Army Corps of Engineers (June 1972, as amended March 1992) or with some other equivalent standard. All plans and specifications for such flood-proofing shall be accompanied by a statement certified by a registered professional engineer or architect which states that the proposed design and methods of construction are in conformance with the above referenced standards.
(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 flood waters 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 flood waters.
(D) Accessory structures. Structures accessory to a principal building need not be elevated or flood- proofed 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, material, 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 flood waters.
(5) Power lines, wiring, and outlets will be at least two 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 flood water for the purpose of equalizing hydrostatic forces on the walls. 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) 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; and
(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 flood waters.
(Ord. 2001-6, passed 8-28-2001) Penalty, see § 152.999