In all areas of flood hazards the following provisions are required for new construction or substantial improvements:
(A) All new construction or substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy;
(B) All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage;
(C) All new construction or substantial improvements below two feet above base flood elevation shall be constructed with materials resistant to flood damage;
(D) New and replacement electrical equipment, heating, ventilating, air conditioning, plumbing connections, and other service equipment shall be located at least one foot above the base flood elevation. Electrical wiring and outlets, switches, junction boxes, and panels shall be elevated at least one foot above the base flood elevation unless they conform to the provisions of the electrical code for location of such items in wet locations. Duct systems shall not be installed below one foot above the base flood elevation;
(E) All new or replaced sewer treatment plants (including all pumping stations and collector systems), and on-site waste disposal systems shall be designed or located to avoid impairment to them or contamination from them, during a base flood event;
(F) All new or replacement water facilities shall be designed to minimize or eliminate infiltration of floodwaters into the systems;
(G) New and replacement sanitary sewage systems shall be designed to minimize infiltration of floodwaters into the systems and discharges from systems into floodwaters;
(H) Storm drainage shall be designed to convey the flow of surface waters to minimize or eliminate damage to persons or property;
(I) All materials or equipment that are flammable, explosive, or injurious to human, animal, or plant life is prohibited in a flood hazard area;
(J) Buoyant materials, equipment, or debris located in a flood hazard area shall be anchored to prevent movement due to floodwaters;
(K) Fill placed within the SFHA shall result in no net loss of natural floodplain storage or increase in water surface elevations during the base flood. The volume of the loss of floodwater storage due to filling in the SFHA shall be offset by providing an equal volume of flood storage by excavation or other compensatory measures made above the normal water level and below the BFE at, or adjacent to, the development site;
(L) Detention of increased runoff from the development site shall be provided above the BFE;
(M) A natural or established watercourse requires a development setback of 20 feet on each side of the watercourse, or be designed to provide at least an equal conveyance capacity with 40 feet of drainage easement; and
(N) New development proposals will be designed and constructed, to the maximum extent practicable, so building sites, walkways, driveways, parking lots, storage areas, and roadways are located on land with a natural grade within elevations not less than one foot above the BFE and with dry land access.
(Ord. 2016-34, passed 6-22-2021)