The Division of Coastal Engineering constructs and maintains
shore protection structures including jetties, groins,
seawalls, breakwaters, and bulkheads in order to protect
the coastline and the navigable channels of New Jersey.
| Townsend's Inlet South Jetty Construction
Photo courtesy of the US Army
shore protection measures included jetties and groins
constructed perpendicular to the shoreline for the purpose
of lessening the impacts of erosion by reducing the rate
of sediment transport along vulnerable coastlines.
series of groins constructed along a shoreline, also
referred to as "groin fields," serve to interrupt
the ocean's near-shore littoral drift patterns and push
the alongshore currents farther offshore. These structures
stabilize areas along vulnerable coastlines, however
can have unintended adverse impacts to down-drift beaches
if alongshore sediments remain permanently impounded.
| Recent groin notching in Monmouth County
Photo courtesy of the US Army Corps
studies have indicated that increasing the permeability
of new and existing groins can serve to provide both
shoreline stabilization and limit diffusive losses when
located within a large-scale beach nourishment project.
methods to increase groin permeability include lowering
offshore crest elevations, notching and/or shortening
of the groin, and increasing material porosity to allow
a finite amount of sediment to pass over or through the
groin. When incorporated with beach nourishment, permeable
groins have proven to be effective in limiting overall
project losses and subsequently extending the longevity
| Seawall along the Atlantic Ocean in Seabright, NJ
In areas where the erosive forces exceed
nature's ability to protect itself, seawalls, breakwaters
and bulkheads can be a viable solution by providing both
shoreline stabilization and coastal flood protection.
constructed along inlets, bays and other coastal waterways,
these structures also serve to keep waterways clear of
sediments and debris and maintain open navigation channels.
Recently completed bulkhead along Barnegat
Shore protection projects are funded through
the Shore Protection Fund (N.J.S.A. 13:19-16 et seq),
either through a federal-state-local cost share or a
state-local cost share, depending on the size and scope
of the project. Design and real estate acquisition costs
are the responsibility of the local sponsor.
shore protection structures are designed, constructed
and maintained through the Division of Coastal Engineering.
Additionally, the Division is currently conducting coastal storm risk management feasibility studies jointly with the U. S. Army Corps of Engineers along much of the state’s Bayshore communities for the purpose of storm damage reduction and, in some cases, ecosystem restoration. The New Jersey Back Bays Feasibility Study is the largest and most complex of these studies and spans 950 square miles from Monmouth to Cape May County.