(A) All uses permitted in the base zoning district shall be permitted subject to the following exceptions, conditions, and standards pertaining to areas designated as both tidal and nontidal.
(B) In all areas of special flood hazard the following standards shall be required:
(1) Anchoring.
(a) All new construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.
(b) All manufactured homes shall meet the anchoring standards set forth in § 9-4.2011 of this article.
(2) Construction materials and methods.
(a) All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damages.
(b) All new construction and substantial improvements shall be constructed using methods and practices which minimize flood damages.
(c) All new construction and substantial improvements shall be constructed with electrical, heating, ventilation, plumbing, and air-conditioning equipment and other service facilities which are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
(d) Adequate drainage paths around structures on slopes to guide floodwaters around and away from proposed structures shall be required within Zone AO.
(3) Elevation and floodproofing.
(a) New construction and the substantial improvement of any structure in Zone AE or Zone AH shall have the lowest floor, including the basement, elevated at least 12 inches above the base flood elevation. The depth number specified on the FIRM shall be used to determine the elevation of the base flood. Nonresidential structures may meet the standards set forth in subdivision (c) of this subdivision. Upon the completion of the structure, the elevation of the lowest floor, including the basement, shall be certified by a registered professional engineer or surveyor or verified by the Building Inspector to be properly elevated. Such certification or verification shall be provided to the Floodplain Administrator.
(b) New construction and the substantial improvement of any structure in Zone AO shall have the lowest floor, including the basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet on the FIRM or at least two feet if no depth number is specified. Nonresidential structures may meet the standards set forth in subdivision (c) of this subdivision. Upon the completion of the structure, the elevation of the lowest floor, including the basement, shall be certified by a registered professional engineer or surveyor or verified by the Building Inspector to be properly elevated. Such certification or verification shall be provided to the Floodplain Administrator.
(c) Nonresidential construction shall either be elevated in conformance with subdivisions (a) or (b) of this subdivision or, together with attendant utility and sanitary facilities:
1. Be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;
2. Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and
3. Be certified by a registered professional engineer or architect that the standards of this subdivision are satisfied. Such certification shall be provided to the Floodplain Administrator.
(d) For all new construction and substantial improvements, fully enclosed areas below the lowest floor which areas 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 shall either be certified by a registered professional engineer or architect or meet or exceed the following minimum criteria:
1. Either 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 no higher than one foot above the grade. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided they permit the automatic entry and exit of floodwaters; or
2. Be certified to comply with a local floodproofing standard approved by the Federal Insurance Administration.
(e) Manufactured homes shall also meet the standards set forth in § 9-4.2011 of this article.
(4) Standards for recreational vehicles. All recreational vehicles placed in Zones A1-30, AH, and AE will either:
(a) Be on the site for fewer than 180 consecutive days;
(b) Be fully licensed and ready for highway use. A recreational vehicle is ready for highway use if it is on its wheels or jack system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions; or
('66 Code, § 9-4.2007) (Ord. 708-C-S, passed 5-12-88; Am. Ord. 2025-C-S, passed 5-12-09)