A. General Standards: In all areas of special flood hazard, the following standards are required:
1. Anchoring:
a. All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads including the effects of buoyancy.
b. All manufactured homes should be anchored to resist flotation, collapse or lateral movement resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. Methods of anchoring may include, but are not limited to, use of over the top or frame ties to ground anchors.
2. Construction Materials And Methods: All new construction and substantial improvements shall be constructed using methods, materials and utility equipment that resist or minimize flood damage.
3. Utilities:
a. All electrical, heating, ventilating, plumbing, air conditioning, and other service facilities shall be designed and located to prevent water from entering or accumulating within the components during flooding conditions.
b. All new and replacement water supply systems and sanitary sewer systems shall be designed to minimize or eliminate infiltration of floodwaters into the system. Sanitary sewer systems shall be designed to minimize or eliminate discharge into floodwaters.
c. On site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
4. Subdivision Proposals:
a. All proposed subdivisions, manufactured home parks and subdivisions, and other developments shall be consistent with the need to minimize flood damage.
b. All proposed subdivisions, manufactured home parks and subdivisions, and other developments shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize flood damage.
c. All proposed subdivisions, manufactured home parks and subdivisions, and other developments shall have adequate drainage provided to reduce exposure to flood damage.
d. Base flood elevation data shall be provided for proposed subdivisions, manufactured home parks and subdivisions and other proposed developments which contain at least fifty (50) lots or five (5) acres, whichever is less. (1975 Code § 4-5-3-1)
B. Specific Standards: Where base flood elevation data has been provided by FEMA, the provisions below are required. If said data is not available, the responsible agency must use judgment and be guided by the mapped 100-year flood boundaries, past flood accounts described in newspapers, photos and eyewitness accounts, or by high water marks on buildings, telephone poles, bridges or other structures. The responsible agency, wherever possible, should designate the floodproofing elevation. The following provisions would then be required:
1. Residential Construction:
a. New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated above base flood elevation.
b. Manufactured homes shall be placed so that the lowest floor is above the base flood elevation.
2. Nonresidential Construction: New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor, including basement, elevated above the base flood elevation or, together with attendant utility and sanitary facilities, shall:
a. Be floodproofed so that above the base flood level the structure is watertight with walls substantially impermeable to the passage of water;
b. Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and
c. Be certified by a registered professional engineer or architect that the standards of this subsection are satisfied. Such certification shall be provided to the responsible agency as set forth in subsection 11-1-9A of this chapter. (1975 Code § 4-5-3-2)