§ 5.4. Standards for areas of shallow flooding (AO Zones).

Located within the areas of special flood hazard established in article 3, section B, [Section 3.2] are areas designated as shallow flooding areas (Zones AO & AH). These areas have special flood hazards associated with base flood depths of one to three (3) feet where a clearly defined channel does not exist and where the path of flooding is unpredictable and indeterminate.

In AO Zones the following provisions apply:

5.4.1. (a) All new construction and substantial improvements of residential structures shall have the lowest floor, including basement, elevated to the depth number specified on the flood insurance rate map, in feet, above the highest adjacent grade. If no depth number is specified, the lowest floor, including basement, shall be elevated, at least two (2) feet above the highest adjacent grade.

5.4.2. (b) All new construction and substantial improvements of nonresidential structures shall:

(1)

Have the lowest floor, including basement, elevated to the depth number specified on the flood insurance rate map, in feet, above the highest adjacent grade. If no depth number is specified, the lowest floor including basement, shall be elevated at least two (2) feet above the highest adjacent grade, or;

(2)

Together with attendant utility and sanitary facilities be completely flood-proofed to or above that level so that any space below that level 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.

5.4.3. (c) On-site drainage for all proposed structures in Zones AO and AH located on slopes shall provide adequate drainage paths to guide floodwaters around and away from such structures.

(Ord. of 8-12-08)