15.40.770 Minimizing the potential for flood damage.
   Within any area of the city where the floodplain administrator determines that the land is subject to flooding, including but not limited to the special flood hazard areas, all development, including substantial improvements to structures, must meet the following requirements:
   A.   All new and substantially improved structures shall be anchored at their foundations to prevent flotation, collapse or lateral movement resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy;
   B.   All new and substantially improved building construction materials and utility system equipment shall be resistant to flood damage. Electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities shall be designed and/or located so as to prevent water from entering or accumulating within their components during conditions of flooding;
   C.   The construction methods and practices shall be those which minimize flood damage;
   D.    Multiple occupancy developments, such as subdivisions, shopping centers, etc., shall have their public utility systems, such as sewer, water, gas and electric lines, and their associated facilities, located and constructed in a manner to minimize or eliminate the potential for flood damage. The developments must be constructed with drainage systems which will minimize the exposure to flood damage;
   E.   New and replacement water supply and sanitary sewage systems shall be designed and constructed to minimize or eliminate infiltration of floodwaters into the systems and the discharge from sanitary sewage systems into the floodwaters;
   F.   Onsite waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding;
   G.   Waste disposal systems shall not be installed wholly or partially in a floodway;
   H.   Adequate drainage paths shall be constructed around structures on slopes to guide floodwaters around and away from proposed structures.
   I.   The city may approve certain development in Zone AE on the city’s FIRM which increase the water surface elevation of the base flood by more than one foot, provided that the city first applies for a conditional FIRM revision, fulfills the requirements for such a revision as established under the provisions of 44 C.F.R. § 65.12, and receives the approval of the Federal Insurance Administrator.
   J.   Notwithstanding any other provisions of 44 C.F.R. § 60.3, a city may permit encroachments within the adopted regulatory floodway that would result in an increase in base flood elevations, provided that the city first applies for a conditional FIRM and floodway revision, fulfills the requirements for such revisions as established under the provisions of 44 C.F.R. § 65.12, and receives the approval of the Federal Insurance Administrator.
(Ord. 1397.15.22 § 1 (part), 2019; prior code § 17-4-1(L))