12-1-10: PROVISIONS FOR FLOOD HAZARD REDUCTION:

   A.   General Standards: In all areas of special flood hazard the following provisions are required for all new construction and substantial improvements:

      1.   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;

      2.   All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage;

      3.   All new construction or substantial improvements shall be constructed with materials resistant to flood damage;

      4.   All new construction or substantial improvements shall be constructed 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;

      5.   All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the system;

      6.   New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the system and discharge from the systems into floodwaters; and

      7.   On site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.

   B.   Specific Standards: In all areas of special flood hazards where base flood elevation data has been provided as set forth in: 1) subsection 12-1-6B of this chapter, 2) subsection 12-1-7B8 of this chapter, or 3) subsection C3 of this section, the following provisions are required:

      1.   Residential Construction: New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated to or above the base flood elevation. A registered professional engineer, architect, or land surveyor shall submit a certification to the floodplain administrator that the standard of this subsection as proposed in subsection 12-1-8A1 of this chapter, is satisfied.

      2.   Nonresidential Construction: New construction and substantial improvements of any commercial, industrial or other nonresidential structure shall either have the lowest floor (including basement) elevated to or above the base flood level or together with attendant utility and sanitary facilities, be designed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. A registered professional engineer or architect shall develop and/or review structural design, specifications, and plans for the construction, and shall certify that the design and methods of construction are in accordance with accepted standards of practice as outlined in this subsection. A record of such certification which includes the specific elevation (in relation to mean sea level) to which such structures are floodproofed shall be maintained by the floodplain administrator.

      3.   Manufactured Homes: Require that all manufactured homes to be placed within zone A on a community's FHBM or FIRM shall be installed using methods and practices which minimize flood damage. For the purposes of this requirement, manufactured homes must be elevated and anchored to resist 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 requirement is in addition to applicable state and local anchoring requirements for resisting wind forces.

   C.   Standards For Subdivision Proposals:

      1.   All subdivision proposals including the placement of manufactured home parks and subdivisions shall be consistent with sections 12-1-2, 12-1-3, and 12-1-4 of this chapter.

      2.   All proposals for the development of subdivisions including the placement of manufactured home parks and subdivisions shall meet development permit requirements of subsection 12-1-6C of this chapter; section 12-1-8 of this chapter; and the provisions of this section.

      3.   Base flood elevation data shall be generated for subdivision proposals and other proposed development including the placement of manufactured home parks and subdivisions which is greater than fifty (50) lots or five (5) acres, whichever is less, if not otherwise provided pursuant to subsection 12-1-6B or 12-1-7B8 of this chapter.

      4.   All subdivision proposals including the placement of manufactured home parks and subdivisions shall have adequate drainage provided to reduce exposure to flood hazards.

      5.   All subdivision proposals including the placement of manufactured home parks and subdivisions shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize or eliminate flood damage. (Ord. 2007-08, 12-10-2007)