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 § 114-5.
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 Village of Airmont 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 Village of
Airmont for all fees and other costs in relation to the application.
The applicant must also provide all data, analyses and mapping and
reimburse the Village of Airmont 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 § 114-5, 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 Village of Airmont 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
Village of Airmont for all fees and other costs in relation to the
application. The applicant must also provide all data, analyses and
mapping and reimburse the Village of Airmont for all costs related
to the final map revisions.
[Amended 9-2-2014 by L.L. No. 3-2014]
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 § 114-5.
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 Zones A1-A30, AE or AH, and also Zone A if base flood elevation
data are available, 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. Designs for meeting this requirement
must either be certified by a licensed professional engineer or architect
or meet or exceed the following minimum criteria:
(a)
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
(b)
The bottom of all such openings no higher than
one foot above the lowest adjacent finished grade.
(c)
Openings may be equipped with louvers, valves,
screens or other coverings or devices, provided that 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 be designed to prevent water from entering and accumulating within
the components during a flood and to resist hydrostatic 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.
(4)
On-site waste disposal systems shall be located to
avoid impairment to them or contamination from them during flooding.
[Amended 7-7-2014 by L.L. No. 1-2014; 9-2-2014 by L.L. No. 3-2014]
Elevation. The following standards in addition to the standards in § 114-15A, Subdivision proposals, and § 114-15B, Encroachments, and § 114-16, Standards for all structures, apply to new and substantially improved residential structures located in areas of special flood hazard as indicated:
A.
Within Zones A1-A30, AE and AH and also Zone A if base flood elevations
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
and substantially improved structures shall have the lowest floor
(including basement) elevated at least three feet above the highest
adjacent grade.
C.
Within Zone AO, new and substantially improved structures 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 Village's Flood Insurance Rate Map.
D.
Within Zones AH and AO, adequate drainage paths area 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 in addition to the requirements in § 114-15A, Subdivision proposals, and § 114-15B, Encroachments and § 114-16, 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:
[Amended 7-7-2014 by L.L. No. 1-2014; 9-2-2014 by L.L. No. 3-2014]
(1)
Have the lowest floor, including basement or cellar, elevated to
or above two feet above the base flood elevation.
(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
[Amended 7-7-2014 by L.L. No. 1-2014; 9-2-2014 by L.L. No. 3-2014]
(2)
Together with attendant utility and sanitary facilities, be completely floodproofed to that level to meet the floodproofing standard specified in § 114-18A(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 § 114-18A(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 § 114-15, General standards, and § 114-16, 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.
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.
Elevation on piers consisting of dry stacked blocks is prohibited.
Methods of anchoring may include, but are not limited to, use of over-the-top
or frame ties to ground anchors.
[Amended 7-7-2014 by L.L. No. 1-2014; 9-2-2014 by L.L. No. 3-2014]
C.
[1]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 the lowest adjacent
grade and are securely anchored to an adequately anchored foundation
system to resist flotation, collapse or lateral movement. Elevation
on piers consisting of dry stacked blocks is prohibited.
D.
Within Zone AO, the floor elevation 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 § 114-5 (at least two feet if no depth number is specified). Elevation on piers consisting of dry stacked blocks is prohibited.
[Amended 7-7-2014 by L.L. No. 1-2014; 9-2-2014 by L.L. No. 3-2014]
