Development, land disturbing activity, and encroachments in floodways shall not be authorized unless it has been demonstrated through hydrologic and hydraulic analyses required in accordance with Section 231-105.3A(1) of these regulations, that the proposed encroachment will not result in any increase in the base flood level during occurrence of the base flood discharge. If Section 231-105.3A(1) is satisfied, proposed elevation, addition, or reconstruction of a lawfully existing structure within a floodway shall also be in accordance with Section 801.2 of this chapter and the floodway requirements of N.J.A.C. 7:13.
A.
In Coastal High Hazard Areas and Coastal A Zones:
(1)
New buildings shall only be authorized landward of the reach
of mean high tide.
(2)
The placement of manufactured homes shall be prohibited except
in an existing manufactured home park or subdivision.
(3)
Basements or enclosures that are below grade on all sides are
prohibited.
(4)
The use of fill for structural support of buildings is prohibited.
All new and replaced sanitary sewer facilities, private sewage treatment plants (including all pumping stations and collector systems) and on-site waste disposal systems shall be designed in accordance with the New Jersey septic system regulations contained in N.J.A.C. 14A and N.J.A.C. 7:9A, the UCC Plumbing Subcode (N.J.A.C. 5:23) and Chapter 7, ASCE 24, to minimize or eliminate infiltration of floodwater into the facilities and discharge from the facilities into flood waters, or impairment of the facilities and systems.
All new and replacement water facilities shall be designed in accordance with the New Jersey Safe Drinking Water Act (N.J.A.C. 7:10) and the provisions of Chapter 7 ASCE 24, to minimize or eliminate infiltration of floodwater into the systems.
Storm drainage shall be designed to convey the flow of surface
waters to minimize or eliminate damage to persons or property.
Streets and sidewalks shall be designed to minimize potential
for increasing or aggravating flood levels.
Subject to the limitations of these regulations, fill shall
be designed to be stable under conditions of flooding including rapid
rise and rapid drawdown of floodwater, prolonged inundation, and protection
against flood-related erosion and scour. In addition to these requirements,
when intended to support buildings and structures (Zone A only), fill
shall comply with the requirements of the UCC (N.J.A.C. 5:23). Proposed
fill and encroachments in flood hazard areas shall comply with the
flood storage displacement limitations of N.J.A.C. 7:13.
In coastal high hazard areas and Coastal A Zones, alteration of sand dunes shall be permitted only when the engineering analysis required by Section 231-105.3A(4) of these regulations demonstrates that the proposed alteration will not increase the potential for flood damage. Construction or restoration of dunes under or around elevated buildings and structures shall comply with Section 231-801.9A(3) of these regulations and as permitted under the NJ Coastal Zone Management Rules (N.J.A.C. 7:7).
The placement or storage of any containers holding hazardous
substances in a flood hazard area is prohibited unless the provisions
of N.J.A.C. 7:13 which cover the placement of hazardous substances
and solid waste is met.
