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 §
170-6.
A. Subdivision proposals.
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):
(1) Proposals
shall be consistent with the need to minimize flood damage;
(2) Public utilities
and facilities such as sewer, gas, electrical and water systems shall
be located and constructed so as to minimize flood damage; and
(3) Adequate
drainage shall be provided to reduce exposure to flood damage.
B. Encroachments.
(1) Within Zones
A1-A30 and AE, on streams without a regulatory floodway, no new construction,
substantial improvements or other development (including fill) shall
be permitted unless:
(a) The applicant
demonstrates that the cumulative effect of the proposed development,
when combined with all other existing and anticipated development,
will not increase the water surface elevation of the base flood more
than one foot at any location, or,
(b) The Town
of Webster agrees to apply to the Federal Emergency Management Agency
(FEMA) for a conditional FIRM revision; FEMA approval is received;
and the applicant provides all necessary data, analyses and mapping
and reimburses the Town of Webster for all fees and other costs in
relation to the application. The applicant must also provide all data,
analyses and mapping and reimburse the Town of Webster for all costs
related to the final map revision.
(2) On streams with a regulatory floodway, as shown on the Flood Boundary and Floodway Map or the Flood Insurance Rate Map adopted in §
170-6, no new construction, substantial improvements or other development in the floodway (including fill) shall be permitted unless:
(a) A technical
evaluation by a licensed professional engineer shows that such an
encroachment shall not result in any increase in flood levels during
occurrence of the base flood, or,
(b) The Town
of Webster agrees to apply to the Federal Emergency Management Agency
(FEMA) for a conditional FIRM and floodway revision; FEMA approval
is received; and the applicant provides all necessary data, analyses
and mapping and reimburses the Town of Webster for all fees and other
costs in relation to the application. The applicant must also provide
all data, analyses and mapping and reimburse the Town of Webster for
all costs related to the final map revisions.
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 §
170-15A, Subdivision proposals, §
170-15B, Encroachments, and §
170-16, 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, together with attendant utility and sanitary facilities,
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 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 §
170-18A(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 §
170-18A(2), including the specific elevation (in relation to mean sea level) to which the structure is to be floodproofed.
D. Within Zones
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 §
170-15, General standards, and §
170-16, 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.
(1) Recreational
vehicles placed on sites within Zones A1-A30, AE and AH shall either:
(a) Be on
site fewer than 180 consecutive days,
(b) Be fully
licensed and ready for highway use, or
(c) Meet the requirements for manufactured homes in §
170-19B,
C and
D.
(2) 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.
B. 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.
C. 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.
D. Within Zone AO, the floor shall be elevated above the highest adjacent grade at least as high as the depth number specified on the Flood Insurance Rate Map enumerated in §
170-6 (at least two feet if no depth number is specified).