[Amended 8-22-2007 by Ord. No. 07-28; 6-22-2016 by Ord. No. 2016:11]
In all areas of special flood hazard, compliance
with the applicable requirements of the Uniform Construction Code
(N.J.A.C. 5:23) and the following standards, whichever is more restrictive,
is required:
A.
Anchoring.
(1)
All new construction and substantial improvements
shall be anchored to prevent flotation, collapse or lateral movement
of the structure.
(2)
All manufactured homes shall be anchored to resist
flotation, collapse or lateral movement. Methods of anchoring may
include, but are not to be limited to, use of over-the-top or frame
ties to ground anchors. This requirement is in addition to applicable
state and local anchoring requirements for resisting wind forces.
B.
Construction materials and methods.
C.
Utilities.
(1)
All new and replacement water supply systems shall
be designed to minimize or eliminate infiltration of floodwaters into
the system.
(2)
New and replacement sanitary sewage systems shall
be designed to minimize or eliminate infiltration of floodwaters into
the systems and discharge from the systems into floodwaters.
(3)
On-site waste disposal systems shall be located to
avoid impairment to them or contamination from them during flooding.
(4)
For all new construction and substantial improvements,
the electrical, heating, ventilation, plumbing and air-conditioning
equipment and other service facilities shall be designed and/or located
so as to prevent water from entering or accumulating within the components
during conditions of flooding.
D.
Subdivision proposals.
(1)
All subdivision proposals and other proposed new development
shall be consistent with the need to minimize flood damage.
(2)
All subdivision proposals and other proposed new development
shall have public utilities and facilities, such as sewer, gas, electrical
and water systems, located and constructed to minimize flood damage.
(3)
All subdivision proposals and other proposed new development
shall have adequate drainage provided to reduce exposure to flood
damage.
(4)
Base flood elevation data shall be provided for subdivision
proposals and other proposed new development which contains at least
50 lots or five acres (whichever is less).
E.
Enclosure openings. For all new construction and substantial
improvements, 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
shall be 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
registered professional engineer or architect or must meet or exceed
the following minimum criteria:
(1)
A minimum of two openings in at least two exterior
walls of each enclosed area, having a total net area of not less than
one square inch for every square foot of enclosed area subject to
flooding shall be provided.
(2)
The bottom of all openings shall be no higher than
one foot above grade.
(3)
Openings may be equipped with screens, louvers or
other coverings or devices, provided that they permit the automatic
entry and exit of floodwaters.
[Amended 8-22-2007 by Ord. No. 07-28; 6-22-2016 by Ord. No. 2016:11]
In all areas of special flood hazard where base flood elevation data have been provided as set forth in § 166-7, Basis for establishing areas of special flood hazard, or in § 166-14B, Use of other base flood and floodway data, the following standards are required:
A.
Residential construction.
(2)
New construction and substantial improvement of any residential structure
located in an A or AE Zone shall have the lowest floor, including
basement, sanitary facilities and utilities, elevated at or above
the base flood elevation plus one foot or as required by ASCE/SEI
24-14, Table 2-1, whichever is more restrictive.
B.
Nonresidential construction. New construction and substantial improvement of any commercial, industrial or other nonresidential structure located in an A or AE Zone (for Coastal A Zone construction, see § 166-20) shall:
(1)
Have the lowest floor, including basement, sanitary facilities and
utilities, elevated to or above the level of the base flood elevation
plus one foot or as required by ASCE/SEI 24-14, Table 2-1, whichever
is more restrictive;
(2)
Be floodproofed so that below the base flood plus one foot or as
required by ASCE/SEI 24-14, Table 6-1, whichever is more restrictive,
the structure is watertight with walls substantially impermeable to
the passage of water;
(3)
Have structural components capable of resisting hydrostatic and hydrodynamic
loads and the effects of buoyancy; and
(4)
Be certified by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards of practice for meeting the applicable provisions of this subsection. Such certification shall be provided to the Township Engineer as set forth in § 166-14C.
C.
Manufactured homes.
(1)
Manufactured homes shall be anchored in accordance with § 166-17A(2) and shall be constructed to minimize flood damage including adequate drainage provided to reduce exposure to flood damage.
(2)
All manufactured homes to be placed or substantially improved within
an area of special flood hazard shall be elevated on a permanent foundation
such that the top of the lowest floor is at or above the base flood
elevation plus one foot or as required by ASCE/SEI 24-14, Table 2-1,
whichever is more restrictive.
Located within areas of special flood hazard established in § 166-7 are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of floodwaters which carry debris, potential projectiles and erosion potential, the following provisions apply:
A.
Encroachments, including fill, new construction, substantial
improvements and other development, unless a technical evaluation
demonstrates that encroachment shall not result in any increase in
flood levels during the occurrence of the base flood discharge, shall
be prohibited.
C.
In all areas of special flood hazard in which base
flood elevation data has been provided and no floodway has been designated,
the cumulative effect of any proposed development, when combined with
all other existing and anticipated development, shall not increase
the water surface elevation of the base flood more than 0.2 foot at
any point
[Added 6-22-2016 by Ord.
No. 2016:11][1]
Coastal high-hazard areas (V or VE Zones) and Coastal A Zones are located within the areas of special flood hazard established in § 166-7B. These areas have special flood hazards associated with high-velocity waters from tidal surges and hurricane wave wash; therefore, the following provisions apply:
A.
Location of structures. All buildings or structures shall be located
landward of the reach of the mean high tide and the placement of manufactured
homes shall be prohibited, except in an existing manufactured home
park or subdivision.
B.
Construction methods.
(1)
Elevation. All new construction and substantial improvements shall
be elevated on piling or columns. The bottom of the lowest horizontal
structural member of the lowest floor (excluding the piling or columns)
is elevated to or above the base flood elevation plus one foot or
as required by ASCE/SEI 24-14, Table 4-1, whichever is more restrictive.
C.
Structural support.
(1)
All new construction and substantial improvements shall be securely
anchored on piling or columns. The pile or column foundations and
structure attached thereto shall be anchored to resist flotation,
collapse or lateral movement due to the effects of wind and water
loading values each of which have a one-percent chance of being equaled
or exceeded in any given year.
(2)
The use of fill for structural support of buildings within Zones
V1-30, VE, V and Coastal A Zone is prohibited.
D.
Certification. A registered professional engineer or architect shall develop or review the structural design specifications and plans for the construction and shall certify that the design and methods of construction to be used are in accordance with accepted practice for compliance with the provisions of § 166-20B and § 166-20C.
E.
Space below lowest floor.
(1)
Any alteration, repair, reconstruction or improvement to a structure
started after the enactment of this subsection shall not enclose the
space below the lowest floor unless breakaway walls, open wood lattice-work
or insect screening are used as provided for in this section.
(2)
Breakaway walls, open wood lattice-work or insect screening shall
be allowed below the base flood elevation, provided that they are
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. Breakaway walls shall
be designed for a safe loading resistance of not less than 10 and
no more than 20 pounds per square foot. Use of breakaway walls which
exceed a design safe loading of 20 pounds per square foot (either
by design or when so required by local or state codes) may be permitted
only if a registered professional engineer or architect certifies
that the designs proposed meet the following conditions:
(a)
That the breakaway wall collapse shall result from a water load
less than that which would occur during the base flood; and
(b)
That the elevated portion of the building and supporting foundation
system shall not be subject to collapse, displacement or other structural
damage due to the effects of wind and water load acting simultaneously
on all building components (structural and nonstructural). Water loading
values used shall be those associated with the base flood. Wind loading
values used shall be those required by applicable state or local building
standards.
(3)
If breakaway walls are utilized, such enclosed space shall be used
solely for parking of vehicles, building access or storage and not
for human habitation.
(4)
Prior to construction, plans for any breakaway wall must be submitted
to the construction official and the Township Engineer for approval.
F.
Sand dunes. Any man-made alteration of sand dunes within Coastal
A Zones, VE and V Zones as shown of the DFIRM which would increase
potential flood damage is prohibited.
[1]
Editor's Note: Former § 166-20, Standards and additional
findings, was deleted 8-22-2007 by Ord. No. 07-28.
[Amended 8-22-2007 by Ord. No. 07-28]
The development permit shall be maintained on
file by the Construction Official. A copy of the permit application,
including any plans, drawings, specifications, correspondence and
any other documents associated with such permit application, shall
also be maintained by the Township Engineer.
[Amended 8-22-2007 by Ord. No. 07-28]
If in the administration and implementation
of this chapter the Township Engineer determines that consulting engineering,
surveying, or legal services are required in order to determine the
acceptability of development in a special flood hazard area, said
services shall be paid by the applicant. The Township Engineer may,
at his discretion, require monies to be deposited with the Township
in advance. In all cases where consulting engineering, surveying or
legal services are required, they are to be paid prior to the issuance
of the development permit.