(A) Residential structures. All new or substantially improved residential structures, including manufactured homes, shall have the lowest floor elevated to or above the flood protection elevation. Basements are not permitted. The elevation of the lowest floor shall be certified by a registered surveyor or professional engineer on the elevation certificate, after the lowest floor is in place. Enclosures below the flood protection elevation must be constructed with water equalizing vents to meet the specifications of § 151.086. Improvements which are less than substantial shall be constructed to minimize damage during flooding or shall be elevated to the greatest extent possible.
(B) Nonresidential structures. All new or substantially improved nonresidential structures shall either be elevated as set forth above for residential structures or shall be floodproofed. Floodproofing designs must ensure that areas below the flood protection elevation are watertight with walls substantially impermeable to the passage of water and with structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. If the floodproofing option is chosen, a floodproofing certificate must be completed by a registered professional engineer or architect who shall review the design and specifications and certify that the nonresidential structure will meet this standard. State regulations do not allow basements in nonresidential buildings in the nontidal floodplain.
(Ord. —, passed 10-22-1991; Am. Ord. —, passed 8-20-2013)