(a) New dikes, levees or other structures shall not be permitted within the 100-year floodplain, unless it can be demonstrated that they will not restrict the flow of 100-year floodwaters. The only exceptions to this subsection are structures shown to have overriding public benefit. Replacement or repair of nonbreached dikes are permitted, as long as such replacement or repair does not change the status of the floodplain and maintains the existing ability to utilize the property.

(b) Within the 100-year floodplain, any proposed expansion of commercial or industrial structures or uses, including parking areas, shall be consistent with this code and other ordinances of the city.

(c) The following specific uses are incompatible with the floodplain and shall not be permitted: