(A) Located within the areas of special flood hazard established in § 153.16 are areas designated as areas of shallow flooding.
(1) These areas have special flood hazards associated with flood depths of one to three feet where a clearly defined channel does not exist, where the path of flooding is unpredictable, and where velocity flow may be evident.
(2) Such flooding is characterized by ponding or sheet flow.
(B) Therefore, the following provisions apply:
(1) All new construction and substantial improvements of residential structures shall have the lowest floor (including basement) elevated to two feet or above the base flood elevation, or the highest adjacent grade at least as high as the depth number specified in feet on the community’s FIRM (at least two feet if no depth number is specified); or
(2) All new construction and substantial improvements of nonresidential structures shall;
(a) Have the lowest floor (including basement) elevated to two feet or above the base flood elevation, or the highest adjacent grade at least as high as the depth number specified in feet on the community’s FIRM (at least two feet if no depth number is specified); or
(b) Together with attendant utility and sanitary facilities, be designed so that below the base specified flood depth in an AO Zone, or below the base flood elevation in an AH Zone, the structure 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 the effects of buoyancy.
(3) A registered professional engineer or architect shall submit a certification to the Floodplain Administrator that the standards of this section, as proposed in § 153.37, are satisfied.
(4) Within Zones AH or AO, require adequate drainage paths around structures on slopes, to guide floodwaters around and away from proposed structures.
(Ord. 12-10, passed 6-14-2010; Am. Ord. 9-17, passed 12-11-2017) Penalty, see § 153.99