In all areas of special flood hazard, the following provisions are required:
A. New construction and substantial improvements shall be
anchored to prevent flotation, collapse or lateral movement of the structure.
B. New construction and substantial improvements shall be
constructed with materials and utility equipment resistant to flood damage.
C. New construction or substantial improvements shall be
constructed by methods and practices that minimize flood damage.
D. 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 the components during
conditions of flooding.
E. New and replacement water supply systems shall be designed
to minimize or eliminate infiltration of floodwaters into the system.
F. New and replacement sanitary sewage systems shall be
designed to minimize or eliminate infiltration of floodwaters into the systems
and discharges from the system into floodwaters.
G. On-site waste disposal systems shall be located and constructed
to avoid impairment to them or contamination from them during flooding.
H. Manufactured homes.
(1) All manufactured homes (including mobile homes placed
on a site for 180 consecutive days or longer) to be placed or substantially
improved shall be elevated so that the lowest floor is above the base flood
elevation.
(2) Manufactured homes shall be placed on a permanent foundation
which itself is securely anchored and to which the structure is securely anchored
so that it will resist flotation, lateral movement and hydrostatic and hydrodynamic
pressures. Anchoring may include but not be limited to the use of over-the-top
or frame ties to ground anchors.
(3) Manufactured homes shall be installed using methods and
practices which minimize flood damage.
(a) Adequate access and drainage should be provided.
(b) Elevation construction standards include piling foundations
placed no more than 10 feet apart, and reinforcement is provided for piers
more than six feet above ground level.
(4) In any portion of a watercourse which is altered or relocated,
the flood-carrying capacity shall be maintained.
(5) A structure already in compliance with the provisions
of this chapter shall not be made noncompliant by any alteration, repair,
reconstruction or improvement to the structure.
The administrator shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a federal, state or other source, including data developed pursuant to §
88-18A(1) of this chapter, as criteria for requiring that new construction, substantial improvements or other development in Zone A on the community's FIRM meet the standards in §§
88-18A(1),
B and
C and
88-19.
In all special flood hazard areas, the following requirements shall
apply:
A. All subdivision proposals shall be consistent with the
need to minimize flood damage.
B. All subdivision proposals shall have public utilities
and facilities such as sewer, gas, electrical and water systems located and
constructed to minimize flood damage.
C. All subdivision proposals shall have adequate drainage
provided to reduce exposure to flood hazards.
D. In Zone A, base flood elevation data shall be provided
for subdivision proposals and other proposed development (including manufactured
home parks and subdivisions) which are five acres or 50 lots, whichever occurs
first.