The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in §
134-6.
The following standards apply to all new subdivision proposals
and other proposed development in areas of special flood hazard (including
proposals for manufactured home and recreational vehicle parks and
subdivisions):
A. Proposals shall be consistent with the need to minimize flood damage;
B. Public utilities and facilities, such as sewer, gas, electrical and
water systems, shall be located and constructed so as to minimize
flood damage; and
C. Adequate drainage shall be provided to reduce exposure to flood damage.
The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in §
134-6.
New structures and substantial improvement to structures in
areas of special flood hazard shall be anchored to prevent flotation,
collapse, or lateral movement during the base flood. This requirement
is in addition to applicable state and local anchoring requirements
for resisting wind forces.
The following standards apply to new and substantially improved residential structures located in areas of special flood hazard, in addition to the requirements in §§
134-23, Subdivision proposals, 134-24, Encroachments, and 134-25, Standards for all structures.
A. Within Zones A1-A30, AE and AH and also Zone A if base flood elevation
data are available, new construction and substantial improvements
shall have the lowest floor (including basement) elevated to or above
two feet above the base flood elevation.
B. Within Zone A, when no base flood elevation data are available, new
construction and substantial improvements shall have the lowest floor
(including basement) elevated at least three feet above the highest
adjacent grade.
C. Within Zone AO, new construction and substantial improvements shall have the lowest floor (including basement) elevated above the highest adjacent grade at least as high as two feet above the depth number specified in feet on the community's Flood Insurance Rate Map enumerated in §
134-6 (at least two feet if no depth number is specified).
D. Within Zones AH and AO, adequate drainage paths are required to guide
floodwaters around and away from proposed structures on slopes.
The following standards apply to new and substantially improved commercial, industrial and other nonresidential structures located in areas of special flood hazard, in addition to the requirements in §§
134-23, Subdivision proposals, 134-24, Encroachments, and 134-25, Standards for all structures.
A. Within Zones A1-A30, AE and AH, and also Zone A if base flood elevation
data are available, new construction and substantial improvements
of any nonresidential structure shall either:
(1) Have the lowest floor, including basement or cellar, elevated to
or above two feet above the base flood elevation; or
(2) Be floodproofed so that the structure is watertight below two feet
above the base flood elevation, including attendant utility and sanitary
facilities, with walls substantially impermeable to the passage of
water. All structural components located below the base flood level
must be capable of resisting hydrostatic and hydrodynamic loads and
the effects of buoyancy.
B. Within Zone AO, new construction and substantial improvements of
nonresidential structures shall:
(1) Have the lowest floor (including basement) elevated above the highest
adjacent grade at least as high as two feet above the depth number
specified in feet on the community's FIRM (at least two feet
if no depth number is specified); or
(2) Together with attendant utility and sanitary facilities, be completely floodproofed to that level to meet the floodproofing standard specified in Subsection
A(2).
C. If the structure is to be floodproofed, a licensed professional engineer or architect shall develop and/or review structural design, specifications, and plans for construction. A floodproofing certificate or other certification shall be provided to the local administrator that certifies the design and methods of construction are in accordance with accepted standards of practice for meeting the provisions of Subsection
A(2) including the specific elevation (in relation to mean sea level) to which the structure is to be floodproofed.
D. Within Zone AH and AO, adequate drainage paths are required to guide
floodwaters around and away from proposed structures on slopes.
E. Within Zone A, when no base flood elevation data are available, the
lowest floor (including basement) shall be elevated at least three
feet above the highest adjacent grade.
The following standards in addition to the standards in §
134-22, General standards, and §
134-25, Standards for all structures, apply as indicated in areas of special flood hazard to manufactured homes and to recreational vehicles which are located in areas of special flood hazard.
A. Recreational vehicles placed on sites within Zones A1-A30; AE and
AH shall either:
(1) Be on site fewer than 180 consecutive days;
(2) Be fully licensed and ready for highway use; or
(3) Meet the requirements for manufactured homes in Subsections
C,
D and
E.
B. A recreational vehicle is ready for highway use if it is on its wheels
or jacking system, is attached to the site only by quick-disconnect
type utilities and security devices and has no permanently attached
additions.
C. A manufactured home that is placed or substantially improved in Zones
A1 -A30, AE and AH shall be elevated on a permanent foundation such
that the lowest floor is elevated to or above two feet above the base
flood elevation and is securely anchored to an adequately anchored
foundation system to resist flotation, collapse and lateral movement.
D. Within Zone A, when no base flood elevation data are available, new
and substantially improved manufactured homes shall be elevated such
that the manufactured home chassis is supported by reinforced piers
or other foundation elements of at least equivalent strength that
are no less than 36 inches in height above grade and are securely
anchored to an adequately anchored foundation system to resist flotation,
collapse or lateral movement.
E. Within Zone AO, the floor shall be elevated above the highest adjacent grade at least as high as two feet above the depth number specified on the Flood Insurance Rate Map enumerated in §
134-6 (at least two feet if no depth number is specified).