In all areas of special flood hazard the following provisions are required:
(A) New construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement of the structure;
(B) Manufactured homes shall be anchored to prevent flotation, collapse, or lateral movement. Methods of anchoring may include, but are not limited to use of over-the-top or frame ties to ground anchors. This standard shall be in addition to and consistent with applicable state requirements for resisting wind forces;
(C) New construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage;
(D) New construction or substantial improvements shall be constructed by methods and practices that minimize flood damage;
(E) Electrical, heating, ventilation, plumbing, air-conditioning equipment, and other service facilities shall be designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding; and if
(F) Within Zones AH or AO, so that there are adequate drainage paths around structures on slopes to guide flood waters around and away from proposed structures;
(G) New and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system;
(H) New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters;
(I) On-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding;
(J) Any alteration, repair, reconstruction, or improvements to a structure on which is in compliance with the provisions of this section, shall meet the requirements of new construction contained in this section; and
(K) A HEC II computer analysis or an approved computer modeling program will be run for all developments by the developer to determine off-site effects to flood water elevation on adjoining properties. Any questions concerning the running of the HEC II study shall be directed to and interpreted by the Flood Safety Officer. The HEC II Study will be certified by a licensed engineer.
(L) No fill material is permitted within the area of special flood hazard. Fill material is defined in § 151.10. Any fill material incorporated into the area of special flood hazard will constitute a violation of this chapter. Fill material placed in the area of special flood hazard must be compensated by removing an equal amount of fill from the area of special flood hazard. The fill introduced and the removal of fill will be documented appropriately with the documentation being submitted to the Flood Safety Officer for approval. The documentation must be certified by a licensed engineer.
(M) Property within the area of special flood hazard may be graded, and the contour elevations within the areas of special flood hazard may be altered or changed upon proper documentation being submitted to the Flood Safety Officer for review and approval. A licensed engineer must certify predevelopment contour and post-development contour changes.
(N) The Flood Safety Officer, at his or her discretion, may require a HEC-II study to be performed for divisions (K) and (L) above.
(O) Any alteration, repair, reconstruction, or improvements to a structure, which is not in compliance with the provisions of this chapter, shall be undertaken only if said non-conformity is not furthered, extended, or replaced.
(Ord. 16-2008, passed 8-5-2008)