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State of New Jersey Department of Environmental Protection

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GENERAL PERMIT 8 – Construction of Gabions at a Single- Family Home or Duplex Lot  

General Permit 8 authorizes construction of gabions at a single-family home or duplex lot, provided:

  • The gabions meets the definition at N.J.A.C. 7:7-1.5;
  • The single-family home or duplex is not part of a larger development owner or controlled by the same property owner;
  • The eroding shoreline is not located along the Atlantic  Ocean, Delaware Bay, Raritan Bay or Sandy Hook Bay;
  • The gabions are laid along the face of the shore such that the waterward slope of the gabions, as measured along the face of the gabions, are no steeper than one vertical to two horizontal. If the steepness and height of the slope of the non-storm shoreline profile precludes construction of a sloped gabion system, then the waterward slope of a step faced gabion system, as measured along a line connecting the gabions, must be no steeper than one vertical to one horizontal;
  • The placement of the gabions in the waterway is limited to that necessary to protect the shoreline;
  • The toe of the gabions is located at least 3’ below existing grade to prevent undercutting;
  • Rip-rap is placed along the waterward toe of the gabion only if the Department determines that such rip-rap is required to limit scour potential and the areas and volume of rip-rap are minimized;
  • The gabions are placed in such a way as to not result in instability of a coastal bluff or cause erosion of adjacent properties or offshore areas;
  • The gabions are tightly packed with 4” to 8” diameter stone (to minimize movement of the interior stone and consequent damage to the wire) and the edges are laced together with steel wire;
  • Individual gabions are wired together;
  • The size and number of gabions are determined by a design engineer based on wave height range for the site;
  • Fill material placed to achieve the required slope is added only to the upland, free of large stones, and firmly compacted before construction of the gabions begins; and
  • Public access is provided in accordance with the lands and waters subject to Public trust rights rule, N.J.A.C. 7:7-9.48, and the Public access rule, N.J.A.C. 7:7-16.9.

Please be advised:

  • Placing gabions in dunes or wetlands is prohibited and any wetlands disturbed during construction must be restored to pre-construction conditions.

Full details are provided at N.J.A.C.7:7-6.8.

If your project does not meet the requirements of the General Permit 8, it may qualify for another General Permit, Permit-by-rule, or an Individual Permit.  Additional information on these permit types can be found on the Coastal Permitting page.

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Last Updated: August 26, 2019