[Added 3-17-1987 by L.L. No. 3-1987[1]; 2-9-1994; 10-20-1998 by L.L. No. 4-1998; 9-15-2009 by L.L. No.
9-2009]
[1]
Editor's Note: This local law also superseded
former Art. XL, Flood Damage Prevention, added 11-19-1974, amended
7-5-1983.
A.
Findings. The Town Board of the Town of Islip finds
that the potential and/or actual damages from flooding and erosion
may be a problem to the residents of the Town of Islip and that such
damages may include destruction or loss of private and public housing,
damage to public facilities, both publicly and privately owned and
injury to and loss of human life. In order to minimize the threat
of such damages and to achieve the purposes and objectives hereinafter
set forth, this local law is adopted.
B.
Statement of purpose. It is the purpose of this local
law to promote the public health, safety and general welfare and to
minimize public and private losses due to flood conditions in specific
areas by provisions designed to:
(1)
Regulate uses which are dangerous to health, safety
and property due to water or erosion hazards or which result in damaging
increases in erosion or in flood heights or velocities.
(2)
Require that uses vulnerable to floods, including
facilities which serve such uses, be protected against flood damage
at the time of initial construction.
(3)
Control the alteration of natural floodplains, stream
channels and natural protective barriers which are involved in the
accommodation of floodwaters.
(4)
Control filling, grading, dredging and other development
which may increase erosion or flood damages.
(5)
Regulate the construction of flood barriers which
will unnaturally divert floodwaters or which may increase flood hazards
to other lands.
(6)
Qualify for and maintain participation in the National
Flood Insurance Program.
C.
Objectives. The objectives of this local law are to:
(1)
Protect human life and health.
(2)
Minimize expenditure of public money for costly flood
control projects.
(3)
Minimize the need for rescue and relief efforts associated
with flooding and generally undertaken at the expense of the general
public.
(4)
Minimize prolonged business interruptions.
(5)
Minimize damage to public facilities and utilities,
such as water and gas mains; electric, telephone and sewer lines;
and streets and bridges located in areas of special flood hazard.
(6)
Help maintain a stable tax base by providing for the
sound use and development of areas of special flood hazard so as to
minimize future flood blight areas.
(7)
Provide that developers are notified that property
is in an area of special flood hazard.
(8)
Ensure that those who occupy the areas of special
flood hazard assume responsibility for their actions.
A.
Unless specifically defined below, words or phrases
used in this local law shall be interpreted so as to give them the
meanings they have in common usage and to give this local law its
most reasonable application.
B.
APPEAL
AREA OF SPECIAL FLOOD HAZARD
BASE FLOOD
BASEMENT
BREAKAWAY WALL
BUILDING
CELLAR
COASTAL HIGH HAZARD AREA
CRAWL SPACE
CRITICAL FACILITIES
(1)
(2)
(3)
(4)
CUMULATIVE SUBSTANTIAL IMPROVEMENT
DEVELOPMENT
ELEVATED BUILDING
FEDERAL EMERGENCY MANAGEMENT AGENCY
FLOOD BOUNDARY AND FLOODWAY MAP (FBFM)
FLOOD ELEVATION STUDY
FLOOD HAZARD BOUNDARY MAP (FHBM)
FLOOD INSURANCE RATE MAP (FIRM)
FLOOD INSURANCE STUDY
FLOOD or FLOODING
(1)
(2)
FLOODPLAIN or FLOOD-PRONE AREA
FLOODPROOFING
FLOODWAY
FUNCTIONALLY DEPENDENT USE
HIGHEST ADJACENT GRADE
HISTORIC STRUCTURE
(1)
(2)
(3)
(4)
LOCAL ADMINISTRATOR
LOWEST FLOOR
MANUFACTURED HOME
MANUFACTURED HOME PARK OR SUBDIVISION
MEAN SEA LEVEL
MOBILE HOME
NEW CONSTRUCTION
ONE-HUNDRED-YEAR-FLOOD or 100-YEAR FLOOD
PRIMARY FRONTAL DUNE
PRINCIPALLY ABOVE GROUND
RECREATIONAL VEHICLE
(1)
(2)
(3)
(4)
REGULATORY FLOODWAY
SAND DUNES
START OF CONSTRUCTION
STRUCTURE
SUBSTANTIAL DAMAGE
SUBSTANTIAL IMPROVEMENT
(1)
(2)
VARIANCE
As used in this local law, the following terms shall
have the meanings indicated:
A request for a review of the local administrator's interpretation
of any provision of this local law or a request for a variance.
AREA OF SHALLOW FLOODING
A designated AO, AH or VO Zone on a community’s Flood
Insurance Rate Map (FIRM) with a one-percent or greater annual chance
of flooding to an average annual depth of one foot to three feet where
a clearly defined channel does not exist, where the path of flooding
is unpredictable and where velocity flow may be evident. Such flooding
is characterized by ponding or sheet flow.
The land in the floodplain within a community subject to
a one-percent or greater chance of flooding in any given year. This
area may be designated as Zone A, AE, AH, AO, A1-A30, A99, V, VO,
VE, or V1-V30. It is also commonly referred to as the “base
floodplain” or "one-hundred-year floodplain." For purposes of
this article, the term "special flood hazard area (SFHA)" is synonymous
in meaning with the phrase "area of special flood hazard."
The flood having a one-percent chance of being equaled or
exceeded in any given year.
That portion of a building having its floor subgrade (below
ground level) on all sides.
A wall that is not part of the structural support of the
building and is intended, through its design and construction, to
collapse under specific lateral loading forces without causing damage
to the elevated portion of the building or the supporting foundation
system.
See "structure."
The same meaning as definition of "basement."
An area of special flood hazard extending from offshore to
the inland limit of a primary frontal dune along an open coast and
any other area subject to high-velocity wave action from storms or
seismic sources. The area is designated on a FIRM as Zone V1-V30,
VE, VO or V.
An enclosed area beneath the lowest elevated floor, 18 inches
or more in height, which is used to service the underside of the lowest
elevated floor. The elevation of the floor of this enclosed area,
which may be of soil, gravel, concrete or other material, must be
equal to or above the lowest adjacent exterior grade. The enclosed
crawl space area shall be properly vented to allow for the equalization
of hydrostatic forces which would be experienced during periods of
flooding.
Structures or facilities that produce, use, or store highly
volatile, flammable, explosive, toxic and/or water-reactive materials;
Hospitals, nursing homes, and housing likely to contain occupants
who may not be sufficiently mobile to avoid death or injury during
a flood;
Police stations, fire stations, vehicle and equipment storage
facilities, and emergency operations centers that are needed for flood
response activities before, during, and after a flood; and
Public and private utility facilities that are vital to maintaining
or restoring normal services to flooded areas before, during, and
after a flood.
Any reconstruction, rehabilitation, addition, or other improvement
of a structure that equals or exceeds 50% of the market value of the
structure at the time of the improvement or repair when counted cumulatively
for 10 years.
Any man-made change to improved or unimproved real estate,
including but not limited to buildings or other structures, mining,
dredging, filling, paving, excavation or drilling operations or storage
of equipment or materials.
A nonbasement building (i) built, in the case of a building
in Zone A1-A30, AE, A, A99, AO, AH, B, C, X, or D, to have the top
of the elevated floor, or in the case of a building in Zone V1-V30,
VE, or V, to have the bottom of the lowest horizontal structure member
of the elevated floor, elevated above the ground level by means of
pilings, columns (posts and piers), or shear walls parallel to the
flow of the water and (ii) adequately anchored so as not to impair
the structural integrity of the building during a flood of up to the
magnitude of the base flood. In the case of Zone A1-A30, AE, A, A99,
AO, AH, B, C, X, or D, "elevated building" also includes a building
elevated by means of fill or solid foundation perimeter walls with
openings sufficient to facilitate the unimpeded movement of floodwaters.
In the case of Zone V1-V30, VE, or V, "elevated building" also includes
a building otherwise meeting the definition of "elevated building,"
even though the lower area is enclosed by means of breakaway walls
that meet the federal standards.
The federal agency that administers the National Flood Insurance
Program.
An official map of the community published by the Federal
Emergency Management Agency as part of a riverine community's Flood
Insurance Study. The FBFM delineates a regulatory floodway along watercourses
studied in detail in the Flood Insurance Study.
An examination, evaluation and determination of the flood
hazards and, if appropriate, corresponding water surface elevations,
or an examination, evaluation and determination of flood-related erosion
hazards.
An official map of a community, issued by the Federal Emergency
Management Agency, where the boundaries of the areas of special flood
hazard have been designated as Zone A but no flood elevations are
provided.
An official map of a community, on which the Federal Emergency
Management Agency has delineated both the areas of special flood hazard
and the risk-premium zones applicable to the community.
See "flood elevation study."
"Flood or Flooding" also means the collapse or subsidence of land along the shore of a lake or other body of water as a result of erosion or undermining caused by waves or currents of water exceeding anticipated cyclical levels or suddenly caused by an unusually high water level in a natural body of water, accompanied by a severe storm, or by an unanticipated force of nature, such as a flash flood or an abnormal tidal surge, or by some similarly unusual and unforeseeable event which results in flooding as defined in Subsection (1)(a) above.
Any land area susceptible to being inundated by water from
any source (see definition of "flooding").
Any combination of structural and nonstructural additions,
changes or adjustments to structures which reduce or eliminate flood
damage to real estate or improved real property, water and sanitary
facilities, structures and their contents.
The same meaning as "regulatory floodway."
A use which cannot perform its intended purpose unless it
is located or carried out in close proximity to water, such as a docking
or port facility necessary for the loading and unloading of cargo
or passengers, shipbuilding and ship repair. The term does not include
long-term storage, manufacture, sales or service facilities.
The highest natural elevation of the ground surface, prior
to construction, next to the proposed walls of a structure.
Any structure that is:
Listed individually in the National Register of Historic Places
(a listing maintained by the Department of the Interior) or preliminarily
determined by the Secretary of the Interior as meeting the requirements
for individual listing on the National Register;
Certified or preliminarily determined by the Secretary of the
Interior as contributing to the historical significance of a registered
historic district or a district preliminarily determined by the Secretary
to qualify as a registered historic district;
Individually listed on a state inventory of historic places
in states with historic preservation programs which have been approved
by the Secretary of the Interior; or
Individually listed on a local inventory of historic places
in communities with historic preservation programs that have been
certified either:
The person appointed by the community to administer and implement
this article by granting or denying development permits in accordance
with its provisions. This person is often the Building Inspector,
Code Enforcement Officer, or employee of an engineering department.
The lowest floor of the lowest enclosed area, including basement,
and excluding any unfinished flood-resistant enclosure that is usable
solely for vehicle parking, building access or limited storage, provided
that such enclosure is not built so as to render the building or structure
in violation of this article.
[Amended 7-20-2021]
A structure, transportable in one or more sections, which
is built on a permanent chassis and designed to be used with or without
a permanent foundation when connected to the required utilities. This
term does not include a recreational vehicle.
A parcel (or contiguous parcels) of land divided into two
or more manufactured home lots for rent or sale.
For purposes of the National Flood Insurance Program, the
National Geodetic Vertical Datum (NGVD) of 1929, the North American
Vertical Datum of 1988 (NAVD 88), or other datum to which base flood
elevations shown on a community's Flood Insurance Rate Map are referenced.
The same meaning as "manufactured home."
Structures for which the start of construction commenced
on or after the effective date of a floodplain management regulation
adopted by the community and includes any subsequent improvements
to each structure.
The same meaning as "base flood."
A continuous or nearly continuous mound or ridge of sand
with relatively steep seaward and landward slopes immediately landward
and adjacent to the beach and subject to erosion and overtopping from
high tides and waves during major coastal storms. The inland limit
of the primary frontal dune occurs at the point where there is a distinct
change from a relatively steep slope to a relatively mild slope.
At least 51% of the actual cash value, excluding land value
is above ground.
A vehicle which is:
Built on a single chassis;
Four hundred square feet or less when measured at the largest
horizontal projections:
Designed to be self-propelled or permanently towable by a light-duty
truck; and
Not designed primarily for use as a permanent dwelling but as
temporary living quarters for recreational, camping, travel, or seasonal
use.
The channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height, as determined by the Federal Emergency Management Agency in a Flood Insurance Study or by other agencies as provided in § 68-441C(2) of this article.
Naturally occurring accumulations of sand in ridges or mounds
landward of the beach.
The date of permit issuance for new construction and substantial
improvements to existing structures, provided that actual start of
construction, repair, reconstruction, rehabilitation, addition placement,
or other improvement is within 180 days after the date of issuance.
The "actual start of construction" means the first placement of permanent
construction of a building (including a manufactured home) on a site,
such as the pouring of a slab or footings, installation of pilings
or construction of columns. Permanent construction does not include
land preparation (such as clearing, excavation, grading, or filling),
or the installation of streets or walkways, or excavation for a basement,
footings, piers or foundations, or the erection of temporary forms,
or the installation of accessory buildings such as garages or sheds
not occupied as dwelling units or not part of the main building. For
a substantial improvement, the actual start of construction means
the first alteration of any wall, ceiling, floor, or other structural
part of a building, whether or not that alteration affects the external
dimensions of the building.
A walled and roofed building, a manufactured home or a gas-
or liquid-storage tank that is principally above ground.
Damage of any origin sustained by a structure whereby the
cost of restoring the structure to its before-damaged condition would
equal or exceed 50% of the market value of the structure before the
damage occurred. "Substantial damage" also means flood-related damages
sustained by a structure on two separate occasions during a ten-year
period for which the cost of repairs at the time of such flood event,
on the average, equals or exceeds 25% of the market value of the structure
before the damage occurred.
Any reconstruction, rehabilitation, addition, or other improvement
of a structure, the cost of which equals or exceeds 50% of the market
value of the structure before the start of construction of the improvement.
Substantial improvement also means "cumulative substantial improvement."
The term includes structures which have incurred substantial damage,
regardless of the actual repair work performed. The term does not,
however, include either:
Any project for improvement of a structure to correct existing
violations of state or local health, sanitary, or safety code specifications
which have been identified by the local code enforcement official
and which are the minimum necessary to assure safe living conditions;
or
Any alteration of an historic structure, provided that the alteration
will not preclude the structure's continued designation as an historic
structure.
A grant of relief from the requirements of this local law
which permits construction or use in a manner that would otherwise
be prohibited by this local law.
A.
Lands to which this local law applies. This local
law shall apply to all areas of special flood hazards within the jurisdiction
of the Town of Islip, Suffolk County, New York.
B.
Basis for establishing the areas of special flood
hazard.
(1)
The areas of special flood hazard for the Town of
Islip, Community Number 365337, are identified and defined on the
following documents prepared by the Federal Emergency Management Agency:
(a)
Flood Insurance Rate Map Panel Numbers: 36103C0645H, 36103C0655H,
36103C0660H, 36103C0665H, 36103C0670H, 36103C0680H, 36103C0685H, 36103C0689H,
36103C0690H, 36103C0693H, 36103C0695H, 36103C0854H, 36103C0855H, 36103C0858H,
36103C0859H, 36103C0860H, 36103C0862H, 36103C0866H, 36103C0867H, 36103C0869H,
36103C0876H, 36103C0877H, 36103C0878H, 36103C0879H, 36103C0881H, 36103C0882H,
36103C0883H, 36103C0884H, 36103C0886H, 36103C0887H, 36103C0888H, 36103C0889H,
36103C0893H, 36103C0894H, 36103C0895H, 35103C0901H, 36103C0902H, 36103C0905H,
36103C0906H, 36103C0908H, the effective date of which is September
25, 2009, and any subsequent revisions to these map panels that do
not affect areas under our community’s jurisdiction.
(b)
A scientific and engineering report entitled “Flood Insurance
Study, Suffolk County, New York, All Jurisdictions” dated September
25, 2009.
(2)
The above documents are hereby adopted and declared
to be a part of this article. The Flood Insurance Study and/or maps
are on file at: Islip Town Hall, Department of Planning and Development,
655 Main Street, Islip, Suffolk County, New York.
C.
Interpretation and conflict with other laws.
(1)
This local law includes all revisions to the National
Flood Insurance Program through October 27, 1997, and shall supersede
all previous laws adopted for the purpose of flood damage prevention.
(2)
In their interpretation and application, the provisions
of this local law shall be held to be minimum requirements, adopted
for the promotion of the public health, safety and welfare. Whenever
the requirements of this local law are at variance with the requirements
of any other lawfully adopted rules, regulations or ordinances, the
most restrictive, or that imposing the higher standards, shall govern.
D.
Severability. The invalidity of any section or provision
of this local law shall not invalidate any other section or provision
thereof.
E.
Penalties for noncompliance. No structure in an area of special flood hazard shall hereafter be constructed, located, extended, converted or altered and no land shall be excavated or filled without full compliance with the terms of this local law and any other applicable regulations. Any infraction of the provisions of this local law by failure to comply with any of its requirements, including infractions of conditions and safeguards established in connection with conditions of the permit, shall constitute a violation. Any person who violates this local law or fails to comply with any of its requirements shall, upon conviction thereof, be fined no more than $250 or imprisoned for not more than 15 days, or both. Each day of noncompliance shall be considered a separate offense. Nothing herein contained shall prevent the Town of Islip from taking such other lawful action as necessary to prevent or remedy an infraction. Any structure found not compliant with the requirements of this local law for which the developer and/or owner has not applied for the received an approved variance under § 68-443 will be declared noncompliant, and notification shall be sent to the Federal Emergency Management Agency.
F.
Warning and disclaimer of liability. The degree of
flood protection required by this local law is considered reasonable
for regulatory purposes and is based on scientific and engineering
considerations. Larger floods can and will occur on rare occasions.
Flood heights may be increased by man-made or natural causes. This
local law does not imply that land outside the area of special flood
hazard or uses permitted within such areas will be free from flooding
or flood damages. This local law shall not create liability on the
part of the Town of Islip, any officer or employee thereof or the
Federal Emergency Management Agency for any flood damages that result
from reliance on this local law or any administrative decision lawfully
made thereunder.
A.
Designation of the local administrator. The Commissioner
of Planning and Development is hereby appointed local administrator
to administer and implement this local law by granting or denying
development permit applications in accordance with its provisions.
B.
Establishment of development permit.
(1)
A floodplain development permit is hereby established for all construction and other development to be undertaken in areas of special flood hazard in this community for the purpose of protecting its citizens from increased flood hazards and ensuring that new development is constructed in a manner that minimizes its exposure to flooding. It shall be unlawful to undertake any development in an area of special flood hazard, as shown on the Flood Insurance Rate Map enumerated in § 68-440B, without a valid floodplain development permit. Application for a permit shall be made on forms furnished by the local administrator and may include, but not be limited to, plans, in duplicate, drawn to scale and showing: the nature, location, dimensions, and elevations of the area in question; existing or proposed structures, fill, storage of materials, drainage facilities, and the location of the foregoing.
(2)
Fees. All applications for a floodplain development permit shall
be accompanied by an application fee as determined by the Town Board
from time to time. In addition, the applicant shall be responsible
for reimbursing the Town of Islip for any additional costs necessary
for review, inspection and approval of this project. The local administrator
may require a deposit of no more than $500 to cover these additional
costs.
(3)
Application for a permit. The applicant shall provide the following
information, as appropriate. Additional information may be required
on the permit application form.
(a)
The proposed elevation, in relation to mean sea level, of the
lowest floor (including basement or cellar) of any new or substantially
improved structure to be located in Zone A1-A30, AE or AH, or Zone
A if base flood elevation data are available. Upon completion of the
lowest floor, the permittee shall submit to the local administrator
the as-built elevation, certified by a licensed professional engineer
or surveyor.
(b)
The proposed elevation, in relation to mean sea level, of the
bottom of the lowest structural member of the lowest floor (excluding
pilings and columns) of any new or substantially improved structure
to be located in Zone V1-V30 or VE, or Zone V if base flood elevation
data are available. Upon completion of the lowest floor, the permittee
shall submit to the local administrator the as-built elevation, certified
by a licensed professional engineer or surveyor.
(c)
The proposed elevation, in relation to mean sea level, to which
any new or substantially improved nonresidential structure will be
floodproofed. Upon completion of the floodproofed portion of the structure,
the permittee shall submit to the local administrator the as-built
floodproofed elevation, certified by a professional engineer or surveyor.
(d)
A certificate from a licensed professional engineer or architect that any utility floodproofing will meet the criteria in § 68-442A(3), Utilities.
(e)
A certificate from a licensed professional engineer or architect that any nonresidential floodproofed structure will meet the floodproofing criteria in § 68-442E, Nonresidential structures (except coastal high-hazard areas).
(f)
A description of the extent to which any watercourse will be altered or relocated as a result of proposed development. Computations by a licensed professional engineer must be submitted that demonstrate that the altered or relocated segment will provide equal or greater conveyance than the original stream segment. The applicant must submit any maps, computations or other material required by the Federal Emergency Management Agency (FEMA) to revise the documents enumerated in § 68-440B, when notified by the local administrator, and must pay any fees or other costs assessed by FEMA for this purpose. The applicant must also provide assurances that the conveyance capacity of the altered or relocated stream segment will be maintained.
(g)
A technical analysis, by a licensed professional engineer, if
required by the local administrator, which shows whether proposed
development to be located in an area of special flood hazard may result
in physical damage to any other property.
(h)
In Zone A, when no base flood elevation data are available from
other sources, base flood elevation data shall be provided by the
permit applicant for subdivision proposals and other proposed developments
(including proposals for manufactured home and recreational vehicle
parks and subdivisions) that are greater than either 50 lots or five
acres.
(i)
In Zones V1-V30 and VE, and also Zone V if base flood elevation
are available, designs and specifications, certified by a licensed
professional engineer or architect, for any breakaway walls in a proposed
structure with design strengths in excess of 20 pounds per square
foot.
(j)
In Zones V1-V30 and VE, and also Zone V if base flood elevation
are available, for all new and substantial improvements to structures,
floodplain development permit applications shall be accompanied by
design plans and specifications, prepared in sufficient detail to
enable independent review of the foundation support and connection
components. Said plans and specifications shall be developed or reviewed
by a licensed professional engineer or architect, and shall be accompanied
by a statement, bearing the signature of the architect or engineer,
certifying that the design and methods of construction to be used
are in accordance with accepted standards of practice and with all
applicable provisions of this article.
C.
Duties and responsibilities of the local administrator. Duties of
the local administrator shall include, but not be limited to, the
following:
(1)
Permit application review. The local administrator shall conduct
the following permit application review before issuing a floodplain
development permit:
(a)
Review all applications for completeness, particularly with the requirements of § 68-441B(3), Application for a permit, and for compliance with the provisions and standards of this article.
(b)
Review subdivision and other proposed new development, including manufactured home parks, to determine whether proposed building sites will be reasonably safe from flooding. If a proposed building site is located in an area of special flood hazard, all new construction and substantial improvements shall meet the applicable standards of § 68-442. Construction standards, and, in particular, § 68-442A(2), Subdivision proposals.
(c)
Determine whether any proposed development in an area of special flood hazard may result in physical damage to any other property (e.g., stream bank erosion and increased flood velocities). The local administrator may require the applicant to submit additional technical analyses and data necessary to complete the determination. If the proposed development may result in physical damage to any other property or fails to meet the requirements of § 68-442, Construction standards, no permit shall be issued. The applicant may revise the application to include measures that mitigate or eliminate the adverse effects and resubmit the application.
(d)
Determine that all necessary permits have been received from
those governmental agencies from which approval is required by state
or federal law.
(2)
Use of other flood data.
(a)
When the Federal Emergency Management Agency has designated areas of special flood hazard on the community's Flood Insurance Rate Map (FIRM) but has neither produced water surface elevation data (these areas are designated Zone A or V on the FIRM) nor identified a floodway, the local 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 § 68-441B(3)(g), as criteria for requiring that new construction, substantial improvements or other proposed development meet the requirements of this article.
(b)
When base flood elevation data are not available, the local
administrator may use flood information from any other authoritative
source, such as historical data, to establish flood elevations within
the areas of special flood hazard, for the purposes of this article.
(3)
Alteration of watercourses. The local administrator shall:
(a)
Notify to adjacent communities and the New York State Department
of Environmental Conservation prior to permitting any alteration or
relocation of a watercourse, and submit evidence of such notification
to the Regional Director, Region II, Federal Emergency Management
Agency.
(b)
Determine that the permit holder has provided for maintenance
within the altered or relocated portion of said watercourse so that
the flood-carrying capacity is not diminished.
(4)
Construction stage.
(a)
In Zones A1-A30, AE and AH, and also Zone A if base flood elevation
data are available, upon placement of the lowest floor or completion
of floodproofing of a new or substantially improved structure, the
local administrator shall obtain from the permit holder a certification
of the as-built elevation of the lowest floor or floodproofed elevation,
in relation to mean sea level. The certificate shall be prepared by
or under the direct supervision of a licensed land surveyor or professional
engineer and certified by same. For manufactured homes, the permit
holder shall submit the certificate of elevation upon placement of
the structure on the site. A certificate of elevation must also be
submitted for a recreational vehicle if it remains on a site for 180
consecutive days or longer (unless it is fully licensed and ready
for highway use).
(b)
In Zones V1-V30 and VE, and also Zone V if base flood elevation
data are available, upon placement of the lowest floor of a new or
substantially improved structure, the permit holder shall submit to
the local administrator a certificate of elevation, in relation to
mean sea level, of the bottom of the lowest structural member of the
lowest floor (excluding pilings and columns). The certificate shall
be prepared by or under the direct supervision of a licensed land
surveyor or professional engineer and certified by same. For manufactured
homes, the permit holder shall submit the certificate of elevation
upon placement of the structure on the site. An elevation certificate
must also be submitted for a recreational vehicle if it remains on
a site 180 consecutive days or longer (unless it is fully licensed
and ready for highway use).
(c)
Any further work undertaken prior to submission and approval
of the certification shall be at the permit holder's risk. The local
administrator shall review all data submitted. Deficiencies detected
shall be cause to issue a stop-work order for the project unless immediately
corrected.
(5)
Inspections. The local administrator and/or the developer's engineer
or architect shall make periodic inspections at appropriate times
throughout the period of construction in order to monitor compliance
with permit conditions and enable said inspector to certify, if requested,
that the development is in compliance with the requirements of the
floodplain development permit and/or any variance provisions.
(6)
Stop-work orders.
(a)
The local administrator shall issue, or cause to be issued, a stop-work order for any floodplain development found ongoing without a development permit. Disregard of a stop-work order shall subject the violator to the penalties described in § 68-440E of this article.
(b)
The local administrator shall issue, or cause to be issued, a stop-work order for any floodplain development found noncompliant with the provisions of this article and/or the conditions of the development permit. Disregard of a stop-work order shall subject the violator to the penalties described in § 68-440E of this article.
(7)
Certificate of compliance.
(a)
In areas of special flood hazard, as determined by documents enumerated in § 68-440B, it shall be unlawful to occupy or to permit the use or occupancy of any building or premises, or both, or part thereof hereafter created, erected, changed, converted or wholly or partly altered or enlarged in its use or structure until a certificate of compliance has been issued by the local administrator stating that the building or land conforms to the requirements of this article.
(b)
A certificate of compliance shall be issued by the local administrator
upon satisfactory completion of all development in areas of special
flood hazard.
(c)
Issuance of the certificate shall be based upon the inspections conducted as prescribed in § 68-441C(5), Inspections, and/or any certified elevations, hydraulic data, floodproofing, anchoring requirements or encroachment analyses which may have been required as a condition of the approved permit.
(8)
Information to be retained. The local administrator shall retain
and make available for inspection copies of the following:
(a)
Floodplain development permits and certificates of compliance;
(b)
Certifications of as-built lowest floor elevations of structures, required pursuant to § 68-441C(4)(a) and § 68-441C(4)(b), and whether or not the structures contain a basement;
(c)
Floodproofing certificates required pursuant to § 68-441C(4)(a), and whether or not the structures contain a basement;
(e)
Notices required under § 68-441C(3), Alteration of watercourses.
A.
General standards. 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 § 68-440B:
(1)
Coastal high-hazard areas. The following requirements apply within
Zones V1-V30, VE and V:
(a)
All new construction, including manufactured homes and recreational
vehicles on site 180 days or longer and not fully licensed for highway
use, shall be located landward of the reach of high tide.
(b)
The use of fill for structural support of buildings, manufactured
homes or recreational vehicles on site 180 days or longer is prohibited.
(c)
Man-made alteration of sand dunes which would increase potential
flood damage is prohibited.
(2)
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):
(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.
(3)
Encroachments.
(a)
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:
[1]
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
[2]
The Town of Islip 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 Islip 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 Islip for all costs related
to the final map revision.
(b)
On streams with a regulatory floodway, as shown on the Flood Boundary and Floodway Map or the Flood Insurance Rate Map adopted in § 68-440B, no new construction, substantial improvements or other development in the floodway (including fill) shall be permitted unless:
[1]
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
[2]
The Town of Islip 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 Islip 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 Islip for
all costs related to the final map revisions.
(c)
Whenever any portion of a floodplain is authorized for development,
the volume of space occupied by the authorized fill or structure below
the base flood elevation shall be compensated for and balanced by
a hydraulically equivalent volume of excavation taken from below the
base flood elevation at or adjacent to the development site. All such
excavations shall be constructed to drain freely into the watercourse.
No area below the water line of a pond or other body of water can
be credited as a compensating excavation.
B.
Standards for all structures.
(1)
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.
(2)
Construction materials and methods.
(a)
New construction and substantial improvements to structures
shall be constructed with materials and utility equipment resistant
to flood damage.
(b)
New construction and substantial improvements to structures
shall be constructed using methods and practices that minimize flood
damage.
(c)
For enclosed areas below the lowest floor of a structure within
Zone 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 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 (ii)
the bottom of all such openings no higher than one foot above the
lowest adjacent finished grade. 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.
(d)
Within Zones V1-V30 and VE, and also within Zone V if base flood
elevation are available, new construction and substantial improvements
shall have the space below the lowest floor either free from obstruction
or constructed with nonsupporting breakaway walls, open wood latticework
or insect screening intended to collapse under wind and water loads
without causing collapse, displacement, or other structural damage
to the elevated portion of the building or supporting foundation system.
The enclosed space below the lowest floor shall be used only for parking
vehicles, building access or storage. Use of this space for human
habitation is expressly prohibited. The construction of stairs, stairwells
and elevator shafts are subject to the design requirements for breakaway
walls.
(3)
Utilities.
(a)
New and replacement electrical equipment, heating, ventilating,
air-conditioning, plumbing connections, and other service equipment
shall be located at or 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 and hydrodynamic loads and
stresses. Electrical wiring and outlets, switches, junction boxes
and panels shall be elevated to or above the base flood elevation
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;
(b)
New and replacement water supply systems shall be designed to
minimize or eliminate infiltration of floodwaters into the system;
(c)
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
(d)
On-site waste disposal systems shall be located to avoid impairment
to them or contamination from them during flooding.
C.
Elevation of residential structures (except coastal high-hazard areas). The following standards apply to new and substantially improved residential structures located in areas of special flood hazard, in addition to the requirements in § 68-442A(2), Subdivision proposals, and § 68-442A(3), Encroachments, and § 68-442B, Standards for all structures.
(1)
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.
(2)
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.
(3)
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 community's Flood Insurance Rate Map enumerated in § 68-440B (at least two feet if no depth number is specified).
(4)
Within Zones AH and AO, adequate drainage paths are required to guide
floodwaters around and away from proposed structures on slopes.
(5)
Within all areas of special flood hazard, the elevation of the lowest
floor shall not exceed the minimum required elevation by more than
two feet.
[Added 2-28-2017]
D.
Residential structures (coastal high-hazard areas). The following standards, in addition to the standards in § 68-442A(1), Coastal high-hazard areas, and 68-442A(2), Subdivision proposals, and 68-442B, Standards for all structures, apply to new and substantially improved residential structures located in areas of special flood hazard shown as Zone V1-V30, VE or V on the community's Flood Insurance Rate Map designated in § 68-440B:
(1)
Elevation. New construction and substantial improvements shall be
elevated on pilings, columns or shear walls such that the bottom of
the lowest horizontal structural member supporting the lowest elevated
floor (excluding columns, piles, diagonal bracing attached to the
piles or columns, grade beams, pile caps and other members designed
to either withstand storm action or break away without imparting damaging
loads to the structure) is elevated to or above two feet above base
flood elevation so as not to impede the flow of water.
(2)
Determination of loading forces. Structural design shall consider
the effects of wind and water loads acting simultaneously during the
base flood on all building components.
(a)
The structural design shall be adequate to resist water forces
that would occur during the base flood. Horizontal water loads considered
shall include inertial and drag forces of waves, current drag forces,
and impact forces from waterborne storm debris. Dynamic uplift loads
shall also be considered if bulkheads, walls, or other natural or
man-made flow obstructions could cause wave runup beyond the elevation
of the base flood.
(b)
Buildings shall be designed and constructed to resist the forces
due to wind pressure. Wind forces on the superstructure include windward
and leeward forces on vertical walls, uplift on the roof, internal
forces when openings allow wind to enter the house, and upward force
on the underside of the house when it is exposed. In the design, the
wind should be assumed to blow potentially from any lateral direction
relative to the house.
(c)
Wind loading values used shall be those required by the building
code.
(3)
Foundation standards.
(a)
The pilings or column foundation and structure attached thereto
shall be adequately anchored to resist flotation, collapse or lateral
movement due to the effects of wind and water pressures acting simultaneously
on all building components. Foundations must be designed to transfer
safely to the underlying soil all loads due to wind, water, dead load,
live load and other loads (including uplift due to wind and water).
(b)
Spread footings and fill material shall not be used for structural
support of a new building or substantial improvement of an existing
structure.
(4)
Pile foundation design.
(a)
The design ratio of pile spacing to pile diameter shall not
be less than 8:1 for individual piles (this shall not apply to pile
clusters located below the design grade). The maximum center-to-center
spacing of wood piles shall not be more than 12 feet on center under
load-bearing sills, beams, or girders.
(b)
Pilings shall have adequate soil penetration (bearing capacity)
to resist the combined wave and wind loads (lateral and uplift) associated
with the base flood acting simultaneously with typical structure (live
and dead) loads, and shall include consideration of decreased resistance
capacity caused by erosion of soil strata surrounding the piles. The
minimum penetration for foundation piles is to an elevation of five
feet below mean sea level (msl) datum if the BFE is +10 msl or less,
or to be at least 10 feet below msl if the BFE is greater than +10
msl.
(c)
Pile foundation analysis shall also include consideration of
piles in column action from the bottom of the structure to the stable
soil elevation of the site. Pilings may be horizontally or diagonally
braced to withstand wind and water forces.
(d)
The minimum acceptable sizes for timber piles are a tip diameter
of eight inches for round timber piles and eight inches by eight inches
for square timber piles. All wood piles must be treated in accordance
with requirements of EPEE-C3 to minimize decay and damage from fungus.
(e)
Reinforced concrete piles shall be cast of concrete having a
twenty-eight-day ultimate compressive strength of not less than 5,000
pounds per square inch, and shall be reinforced with a minimum of
four longitudinal steel bars having a combined area of not less than
1% nor more than 4% of the gross concrete area. Reinforcing for precast
piles shall have a concrete cover of not less than 1 1/4 inches
for No. 5 bars and smaller and not less than 1 1/2 inches for
No. 6 through No. 11 bars. Reinforcement for piles cast in the field
shall have a concrete cover of not less than two inches.
(f)
Piles shall be driven by means of a pile driver or drop hammer,
jetted, or augered into place.
(g)
Additional support for piles in the form of bracing may include
lateral or diagonal bracing between piles.
(h)
When necessary, piles shall be braced at the ground line in
both directions by a wood timber grade beam or a reinforced concrete
grade beam. These at-grade supports should be securely attached to
the piles to provide support even if secured from beneath.
(i)
Diagonal bracing between piles, consisting of two-inch by eight-inch
(minimum) members bolted to the piles, shall be limited in location
to below the lowest supporting structural member and above the stable
soil elevation and aligned in the vertical plane along pile rows perpendicular
to the shoreline. Galvanized steel rods (minimum diameter 1/2 inch)
or cable-type bracing is permitted in any plane.
(j)
Knee braces, which stiffen both the upper portion of a pile
and the beam-to-pile connection, may be used along pile rows perpendicular
and parallel to the shoreline. Knee braces shall be two-lumber-by-eight
lumber bolted to the sides of the pile/beam, or four-by-four or larger
braces framed into the pile/beam. Bolting shall consist of two 5/8-inch
galvanized steel bolts (each end) for two-members-by-eight members,
or one 5/8-inch lag bolt (each end) for square members. Knee braces
shall not extend more than three feet below the elevation of the base
flood.
(5)
Column foundation design. Masonry piers or poured-in-place concrete
piers shall be internally reinforced to resist vertical and lateral
loads, and be connected with a movement-resisting connection to a
pile cap or pile shaft.
(6)
Connectors and fasteners. Galvanized metal connectors, wood connectors,
or bolts of size and number adequate for the calculated loads must
be used to connect adjoining components of a structure. Toe nailing
as a principal method of connection is not permitted. All metal connectors
and fasteners used in exposed locations shall be steel, hot-dipped
galvanized after fabrication. Connectors in protected interior locations
shall be fabricated from galvanized sheet.
(7)
Beam-to-pile connections. The primary floor beams or girders shall
span the supports in the direction parallel to the flow of potential
floodwater and wave action and shall be fastened to the columns or
pilings by bolting, with or without cover plates. Concrete members
shall be connected by reinforcement, if cast in place, or (if precast)
shall be securely connected by bolting and welding. If sills, beams,
or girders are attached to wood piling at a notch, a minimum of two
5/8-inch galvanized steel bolts or two hot-dipped galvanized straps
3/16 inch by four inches by 18 inches each bolted with two half-inch
lag bolts per beam member shall be used. Notching of pile tops shall
be the minimum sufficient to provide ledge support for beam members
without unduly weakening pile connections. Piling shall not be notched
so that the cross section is reduced below 50%.
(8)
Floor and deck connections.
(a)
Wood two-inch-by-four-inch (minimum) connectors or metal joist
anchors shall be used to tie floor joists to floor beams/girders.
These should be installed on alternate floor joists, at a minimum.
Cross bridging of all floor joists shall be provided. Such cross bridging
may be one-inch-by-three-inch members, placed eight feet on-center
maximum, or solid bridging of same depth as joist at same spacing.
(b)
Plywood should be used for subflooring and attic flooring to
provide good torsional resistance in the horizontal plane of the structure.
The plywood should not be less than 3/4-inch total thickness, and
should be exterior grade and fastened to beams or joists with 8d annular
or spiral thread galvanized nails. Such fastening shall be supplemented
by the application of waterproof industrial adhesive applied to all
bearing surfaces.
(9)
Exterior wall connections. All bottom plates shall have any required
breaks under a wall stud or an anchor bolt. Approved anchors will
be used to secure rafters or joists and top and bottom plates to studs
in exterior and bearing walls to form a continuous tie. Continuous
15/32-inch or thicker plywood sheathing, overlapping the top wall
plate and continuing down to the sill, beam, or girder, may be used
to provide the continuous tie. If the sheets of plywood are not vertically
continuous, then two-by-four-nailer blocking shall be provided at
all horizontal joints. In lieu of the plywood, galvanized steel rods
of half-inch diameter or galvanized steel straps not less than one-inch
wide by 1/16 inch thick may be used to connect from the top wall plate
to the sill, beam, or girder. Washers with a minimum diameter of three
inches shall be used at each end of the half-inch round rods. These
anchors shall be installed no more than two feet from each corner
rod, no more than four feet on center.
(10)
Ceiling/Joist rafter connections.
(a)
All ceiling joists or rafters shall be installed in such a manner
that the joists provide a continuous tie across the rafters. Ceiling
joists and rafters shall be securely fastened at their intersections.
A metal or wood connector shall be used at alternate ceiling joist/rafter
connections to the wall top plate.
(b)
Gable roofs shall be additionally stabilized by installing two-by-four
blocking on two-foot centers between the rafters at each gable end.
Blocking shall be installed a minimum of eight feet toward the house
interior from each gable end.
(11)
Projecting members. All cantilevers and other projecting members
must be adequately supported and braced to withstand wind and water
uplift forces. Roof eave overhangs shall be limited to a maximum of
two feet and joist overhangs to a maximum of one foot. Larger overhangs
and porches will be permitted if designed or reviewed and certified
by a registered professional engineer or architect.
(12)
Roof sheathing.
(a)
Plywood, or other wood material, when used as roof sheathing,
shall not be less than 15/32 inch in thickness, and shall be of exterior
sheathing grade or equivalent. All attaching devices for sheathing
and roof coverings shall be galvanized or be of other suitable corrosion-resistant
material.
(b)
All corners, gable ends, and roof overhangs exceeding six inches
shall be reinforced by the application of waterproof industrial adhesive
applied to all bearing surfaces of any plywood sheet used in the sheathing
of such corner, gable end, or roof overhang.
(c)
In addition, roofs should be sloped as steeply as practicable
to reduce uplift pressures, and special care should be used in securing
ridges, hips, valleys, eaves, vents, chimneys, and other points of
discontinuity in the roofing surface.
(13)
Protection of openings. All exterior glass panels, windows,
and doors shall be designed, detailed, and constructed to withstand
loads due to the design wind speed of 75 miles per hour. Connections
for these elements must be designed to transfer safely the design
loads to the supporting structure. Panel widths of multiple-panel
sliding glass doors shall not exceed three feet.
(14)
Breakaway wall design standards.
(a)
The breakaway wall shall have a design safe loading resistance
of not less than 10 pounds per square foot and not more than 20 pounds
per square foot, with the criterion that the safety of the overall
structure at the point of wall failure be confirmed using established
procedures. Grade beams shall be installed in both directions for
all piles considered to carry the breakaway wall load. Knee braces
are required for front row piles that support breakaway walls.
(b)
Use of breakaway wall strengths in excess of 20 pounds per square
foot shall not be permitted unless a registered professional engineer
or architect has developed or reviewed the structural design and specifications
for the building foundation and breakaway wall components, and certifies
that (1) the breakaway walls will fail under water loads less than
those that would occur during the base flood; and (2) the elevated
portion of the building and supporting foundation system will not
be subject to collapse, displacement, or other structural damage due
to the effects of wind and water loads acting simultaneously on all
building components (structural and nonstructural). Water loading
values used shall be those associated with the base flood. Wind loading
values shall be those required by the building code.
E.
Nonresidential structures (except coastal high-hazard areas). 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 § 68-442A(2), Subdivision proposals, and § 68-442A(3), Encroachments, and § 68-442B, Standards for all structures.
(1)
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:
(a)
Have the lowest floor, including basement or cellar, elevated
to or above two feet above the base flood elevation; or
(b)
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 elevation must be capable of resisting hydrostatic and
hydrodynamic loads and the effects of buoyancy.
(2)
Within Zone AO, new construction and substantial improvements of
nonresidential structures shall:
(a)
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
(b)
Together with attendant utility and sanitary facilities, be completely floodproofed to that level to meet the floodproofing standard specified in § 68-442B(3).
(3)
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 § 68-442E(1)(a), including the specific elevation (in relation to mean sea level) to which the structure is to be floodproofed.
(4)
Within Zones AH and AO, adequate drainage paths are required to guide
floodwaters around and away from proposed structures on slopes.
(5)
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.
F.
Nonresidential structures (coastal high-hazard areas). In Zones V1-V30,
VE and also Zone V if base flood elevations are available, new construction
and substantial improvements of any nonresidential structure, together
with attendant utility and sanitary facilities, shall have the bottom
of lowest member of the lowest floor elevated to or above two feet
above the base flood elevation. Floodproofing of structures is not
an allowable alternative to elevating the lowest floor to two feet
above the base flood elevation in Zones V1-V30, VE and V.
G.
Manufactured homes and recreational vehicles. The following standards, in addition to the standards in § 68-442A. General standards, and § 68-442B, 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.
(1)
Recreational vehicles placed on sites within Zones A1-A30, AE, AH, V1-V30, V, and VE shall either: (i) be on site fewer than 180 consecutive days; (ii) be fully licensed and ready for highway use; or (iii) meet the requirements for manufactured homes in § 68-442G(2), (3) and (4). 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.
(2)
A manufactured home that is placed or substantially improved in Zones
A1-A30, AE, AH, V1-V30, V, and VE 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.
(3)
Within Zone A or V, 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. Elevation on piers consisting of dry
stacked blocks is prohibited.
(4)
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 § 68-440B (at least two feet if no depth number is specified). Elevation on piers consisting of dry stacked blocks is prohibited.
H.
Critical facilities. In order to prevent potential flood damage to
certain facilities that would result in serious danger to life and
health, or widespread social or economic dislocation, no new critical
facility shall be located within any area of special flood hazard,
or within any five-hundred-year flood zone shown as a B Zone or a
Shaded X Zone on the community's Flood Insurance Rate Maps.
A.
Appeals Board.
(1)
The Board of Appeals as established by the Town of
Islip shall hear and decide appeals and requests for variances from
the requirements of this local law.
(2)
The Board of Appeals shall hear and decide appeals
when it is alleged there is an error in any requirement, decision,
or determination made by the local administrator in the enforcement
or administration of this article.
(3)
Those aggrieved by the decision of the Board of Appeals
may appeal such decision to the Supreme Court pursuant to Article
78 of the Civil Practice Law and Rules.
(4)
In passing upon such applications, the Board of Appeals
shall consider all technical evaluations, all relevant factors, standards
specified in other sections of this article and:
(a)
The danger that materials may be swept onto
other lands to the injury of others.
(b)
The danger to life and property due to flooding
or erosion damage.
(c)
The susceptibility of the proposed facility
and its contents to flood damage and the effect of such damage on
the individual owner.
(d)
The importance of the services provided by the
proposed facility to the community.
(e)
The necessity to the facility of a waterfront
location, where applicable.
(f)
The availability of alternative locations for
the proposed use, which are not subject to flooding or erosion damage.
(g)
The compatibility of the proposed use with existing
and anticipated development.
(h)
The relationship of the proposed use to the
comprehensive plan and floodplain management program of that area.
(i)
The safety of access to the property in times
of flood for ordinary and emergency vehicles.
(j)
The costs to local governments and the dangers
associated with conducting search and rescue operations during periods
of flooding.
(k)
The expected heights, velocity, duration, rate
of rise and sediment transport of the floodwaters and the effects
of wave action, if applicable, expected at the site.
(l)
The costs of providing governmental services
during and after flood conditions, including search and rescue operations,
maintenance and repair of public utilities and facilities, such as
sewer, gas, electrical and water systems, and streets and bridges.
(5)
Upon consideration of the factors of § 68-443A(4) and the purposes of this local law, the Board of Appeals may attach such conditions to the granting of variances as it deems necessary to further the purposes of this local law.
(6)
The local administrator shall maintain the records
of all appeal actions, including technical information, and report
any variances to the Federal Emergency Management Agency upon request.
B.
Conditions for variances.
(1)
Generally, variances may be issued for new construction
and substantial improvements to be erected on a lot of 1/2 acre or
less in size contiguous to and surrounded by lots with existing structures
constructed below the base flood elevation, provided that items in
§ 443-A(4)(a) through (l) have been fully considered. As
the lot size increases beyond the 1/2 acre, the technical justification
required for issuing the variance increases.
(2)
Variances may be issued for the repair or rehabilitation
of historic structures upon determination that:
(3)
Variances may be issued by a community for new construction
and substantial improvements and for other development necessary for
the conduct of a functionally dependent use, provided that:
(4)
Variances shall not be issued within any designated
floodway if any increase in flood levels during the base flood discharge
would result.
(5)
Variances shall only be issued upon a determination
that the variance is the minimum necessary, considering the flood
hazard, to afford relief.
(6)
Variances shall only be issued upon receiving written
justification of:
(a)
A showing of good and sufficient cause.
(b)
A determination that failure to grant the variance
would result in exceptional hardship to the applicant.
(c)
A determination that the granting of a variance
will not result in increased flood heights, additional threats to
public safety or extraordinary public expense; create nuisances; cause
fraud on or victimization of the public; or conflict with existing
local laws or ordinances.
(7)
Any applicant to whom a variance is granted for a
building with the lowest floor below the base flood elevation shall
be given written notice that the cost of flood insurance will be commensurate
with the increased risk resulting from lowest floor elevation.
