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 §
165-6.
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 LaFayette 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 LaFayette 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 LaFayette 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 §
165-6, 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 demonstrates
through hydrologic and hydraulic analyses performed in accordance
with standard engineering practice that such an encroachment shall
not result in any increase in flood levels during occurrence of the
base flood; or
(b) The Town of LaFayette 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 LaFayette 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 LaFayette
for all costs related to the final map revisions.
(3) In
Zones A1-A30, AE and AH, and also Zone A if base flood elevation data
are available, if any development is found to increase or decrease
base flood elevations, the Town of LaFayette shall as soon as practicable,
but not later than six months after the date such information becomes
available, notify FEMA and the New York State Department of Environmental
Conservation of the changes by submitting technical or scientific
data in accordance with standard engineering practice.
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 §
165-6.
A. Anchoring.
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.
B. Construction
materials and methods.
(1) New
construction and substantial improvements to structures shall be constructed
with materials and utility equipment resistant to flood damage.
(2) New
construction and substantial improvements to structures shall be constructed
using methods and practices that minimize flood damage.
(3) For
enclosed areas below the lowest floor of a structure within Zone A1-A30,
AE, AO or A, new and substantially improved structures shall have
fully enclosed areas below the lowest floor that are usable solely
for parking of vehicles, building access or storage in an area other
than a basement and which are subject to flooding designed to automatically
equalize hydrostatic flood forces on exterior walls by allowing for
the entry and exit of floodwaters.
(a) Designs for meeting this requirement must either be certified by
a licensed professional engineer or architect or meet or exceed the
following minimum criteria:
[1] A minimum of two openings having a total net area of not less than
one square inch for every square foot of enclosed area subject to
flooding; and
[2] The bottom of all such openings no higher than one foot above the
lowest adjacent finished grade.
(b) Openings may be equipped with louvers, valves, screens or other coverings
or devices, provided they permit the automatic entry and exit of floodwaters.
Enclosed areas subgrade on all sides are considered basements and
are not permitted.
C. Utilities.
(1) New
and replacement electrical equipment, heating, ventilating, air conditioning,
plumbing connections and other service equipment shall be located
at least two feet above the base flood elevation, or at least three
feet above the highest adjacent grade in a Zone A without an available
base flood elevation, or be designed to prevent water from entering
and accumulating within the components during a flood and to resist
hydrostatic and hydrodynamic loads and stresses. Electrical wiring
and outlets, switches, junction boxes and panels shall be elevated
or designed to prevent water from entering and accumulating within
the components unless they conform to the appropriate provisions of
the electrical part of the Building Code of New York State or the
Residential Code of New York State for location of such items in wet
locations;
(2) New
and replacement water supply systems shall be designed to minimize
or eliminate infiltration of floodwaters into the system;
(3) New
and replacement sanitary sewage systems shall be designed to minimize
or eliminate infiltration of floodwaters. Sanitary sewer and storm
drainage systems for buildings that have openings below the base flood
elevation shall be provided with automatic backflow valves or other
automatic backflow devices that are installed in each discharge line
passing through a building's exterior wall; and
(4) On-site
waste disposal systems shall be located to avoid impairment to them
or contamination from them during flooding.
The following standards apply to new and substantially improved residential structures located in areas of special flood hazard, in addition to the requirements in §
165-14, Subsection
A, Subdivision proposals, and Subsection
B, Encroachments, and §
165-15, 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 the depth number specified in feet on the community's Flood Insurance Rate Map enumerated in §
165-6 (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 §
165-14, Subsection
A, Subdivision proposals, and Subsection
B, Encroachments, and §
165-15, 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 that 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
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 §
165-14, General standards, and §
165-15, 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 Subsections
B,
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 A 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 two feet above the depth number specified on the Flood Insurance Rate Map enumerated in §
165-6 (at least two feet if no depth number is specified).
The following standards apply to new and substantially improved accessory structures, including detached garages, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in §
165-6.
A. Within Zones A1-A30, AE, AO, A, accessory structures must meet the standards of §
165-15A, Anchoring.
B. Within
Zones A1-A30, AE and also Zone A if base flood elevation data are
available, areas below two feet above the base flood elevation shall
be constructed using methods and practices that minimize flood damage.
C. Within
Zone AO, or Zone A if base flood elevation data are not available,
areas below three feet above the highest adjacent grade shall be constructed
using methods and practices that minimize flood damage.
D. Structures must be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters in accordance with §
165-15B(3).
E. Utilities must meet the requirements of §
165-15C, Utilities.