§ 11-11. General provisions of the floodplain district.

The following restrictions constitute those general provisions which shall govern development, construction, improvement, and relocation within the floodplain district:

(1)

All persons proposing development within the floodplain district shall obtain approved permits from those government agencies having jurisdiction over floodplain development. No building permit or occupancy permit shall be issued until all such aforementioned permits have been obtained and have been reviewed by the building inspection department.

(2)

Developers of new, substantially improved, or relocated structures within the floodplain district shall submit to the building inspector a written document indicating:

a.

The elevation of the lowest habitable floor in the structure, including basement.

b.

The elevation to which a structure has been floodproofed, if floodproofing methods have been employed.

(3)

Details of specifications proposed and as-built drawings shall be kept on record and will be available for public inspection and for use in determining flood insurance risk premium rates.

(4)

All new construction and substantial improvements made to existing structures, including mobile homes, shall be firmly anchored to prevent flotation, collapse and lateral movement, shall be constructed with flood-resistant materials and utility equipment, and shall be constructed by methods and practices that minimize flood damage.

(5)

All new and replacement water supply systems and sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the systems, and new and replacement sanitary sewage systems shall be designed to minimize discharges from the systems into floodwaters.

(6)

On-site waste disposal systems such as septic tanks and leach fields shall be located to avoid impairment by floodwaters associated with the base flood level.

(7)

All subdivisions and proposed new development shall:

a.

Be consistent with the need to minimize flood damage;

b.

Provide that public utilities and facilities shall be located and constructed to minimize or eliminate flood damage;

c.

Provide adequate drainage to reduce exposure to flood hazards; and

d.

If the proposed subdivision or other new development is greater than fifty (50) lots or five (5) acres, whichever is lesser, provide with such proposals base flood elevation data.

(8)

Should any watercourse relocation or alteration be proposed, notification of such change in the watercourse shall be sent by the developer to all adjacent communities, to the state department of natural resources, and to the U.S. Department of Housing and Urban Development. With the altered or relocated portion of any watercourse the carrying capacity shall be maintained.

(9)

All new residential structures and residential structures requiring substantial improvement shall have the lowest floor (including basement) elevated to or above the level of the base flood.

(10)

All new nonresidential structures and nonresidential structures requiring substantial improvements shall have the lowest floor (including basement) elevated to or above the level of the base flood, 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 certify that the floodproofing standards of this subsection are satisfied.

(Code 1977, § 5.711)