AO Zones have flood hazards associated with base flood depths of one to three feet, where a clearly defined channel does not exist and the water path of flooding is unpredictable and indeterminate with respect to AO Zones that may exist in the town:
(A) All new construction and substantial improvements of residential structures shall have the lowest floor, including basement, elevated two feet greater than the flood depth number specified on the Flood Insurance Rate Map above the highest adjacent grade.
(B) Drainage paths must be provided to guide floodwaters around and away from proposed structures to be constructed on slopes.
(C) All new construction and substantial improvements of non-residential structures shall:
(1) Have the lowest floor, including basement, elevated two feet greater than the flood depth number specified on the flood insurance rate map above the highest adjacent grade.
(2) Together with attendant utility and sanitary facilities be completely floodproofed to the specified flood 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. Certification is required as per § 154.41(C).