APPENDIX E – FLOODPLAIN MANAGEMENTAPPENDIX E – FLOODPLAIN MANAGEMENT\18-104. Standards for the floodway overlay district and the floodway fringe overlay district.

(A)  No permit for development shall be granted for new construction, substantial improvements and other improvements including the placement and manufactured homes within all numbered and unnumbered A Zones (include AE, AO and AH Zones) unless the conditions of this sections are satisfied.

(B)  All areas identified as unnumbered A Zones on the FIRM are subject to inundation of the 100-year flood; however, the water surface elevation was not provided.  The unnumbered A Zones shall be subject to all development provisions of this article.  If Flood Insurance Study data is not available the city superintendent shall obtain, review and reasonably utilize any base flood elevation or floodway data currently available from federal, state or other sources.

(C)  New construction, subdivision proposals, substantial improvements, prefabricated buildings, placement of manufactured homes and other developments shall require:

(1)   Design or anchorage to prevent floatation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.

(2)   New or replacement water supply systems and/or sanitary sewage systems be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters, and on-site waste disposal systems be located so as to avoid impairment or contamination.

(3)   Construction with materials resistant to flood damage, utilizing methods and practices that minimize flood damages, and with electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.

(4)   All utility and sanitary facilities be elevated or flood-proofed up to the regulatory flood protection elevation.

(5)   Storage and Material and Equipment:

(a)   The storage or processing of materials that are in time of flooding buoyant, flammable, explosive, or could be injurious to human, animal or plant life is prohibited.

(b)   Storage of other material or equipment may be allowed if not subject to major damage by floods and firmly anchored to prevent flotation or if readily removable from the area within the time available after flood warning.

(6)   Subdivision proposals and other proposed new development, including manufactured home parks or subdivisions, be required to assure that

(a)   all such proposals are consistent with the need to minimize flood damage,

(b)   all public utilities and facilities, such as sewer, gas, electrical, and water systems are located, elevated and constructed to minimize or eliminate flood damage,

(c)   adequate drainage is provided so as to reduce exposure to flood hazards, and

(d)   proposals for development (including proposals for manufactured home parks and subdivisions) of five acres or 50 lots, whichever is lesser, include within such proposals the regulatory flood elevation.