Duval County Beach Renourishment -- 2016
Information Update (21 July 2016) i
Beach renourishment along the Jacksonville Beaches is expected to begin in early September 2016 and continue through early November 2016.
About 700,000 cubic yards of sand will be placed along all of Jacksonville Beach, Neptune Beach, and most of Atlantic Beach (northward to between 17th and 18th Street). That is, the sand will be placed from about 17th-18th Street AB to the St. Johns County Line.
The renourishment sand will come from the seabed -- at an offshore borrow (dredge) area about 7 miles offshore of Neptune Beach -- in about 50 feet of water depth. It is just south of the borrow areas that have provided most of the sand placed to the project since 1978. The sand has been tested and sampled for quality. It is very similar to the sand placed on the beach in 2011 and the sand that has characterized the beaches over at least the last 20 years. The sand will be picked up from the seabed by a hopper dredge (a ship that dredges the sand and stores it in its hull). The dredge then sails to the beach and pumps the sand, with seawater, through a 30-inch diameter pipeline to the beach. The sand is then spread by bulldozers. The sand fill placement usually progresses along the beach at a rate of between 500 and 1,000 feet per day (that is, moving along 1 to 2 city blocks per day).
Portions of the beach will be closed to public access during construction – typically up to about 1,200 feet alongshore at a time (2 to 3 city blocks) – while placement of the pipes and sand progresses along the beach. Beach closures at any one location usually last only two to three days.
It is currently anticipated that pipes and equipment will begin to arrive at the beach in mid-August 2016. The dredge is scheduled to begin pumping sand by early September 2016, and it typically takes about 55 to 65 days to complete (depending upon the seas and weather). It is anticipated that the work will begin at south Jacksonville Beach and proceed more or less northward, through all of Neptune Beach, then most of Atlantic Beach, to be completed by early November 2016. If not already finished by then, the construction schedule and locations will be arranged to avoid any conflict with this year’s Sea & Sky Spectacular airshow on November 4 - 6.
The Beaches Sea Turtle Patrol began monitoring for marine turtle nests earlier this summer, and it has relocated the nests to a safe area – so that the sea turtle eggs and hatchlings will not be disturbed by the construction. The sea turtle monitoring and nest relocation will continue through construction.
The construction contractor is Great Lakes Dredge and Dock Company. This company also built the last renourishment, in 2011. Management and construction of the project shall be by the US Army Corps of Engineers, Jacksonville District. The City of Jacksonville is the local (non-federal) sponsor for the project.
Construction costs for the project are shared between the federal government (61.6%), the State of Florida (18.1%) and the City of Jacksonville (20.3%). The project’s 2016 construction cost is about $13.5M.
Periodic renourishment of the beach is required to offset the erosion caused the interruption of the natural sand flow by the deep navigation channel and long jetties at the St. Johns River Entrance.
The renourishment is constructed every 5 to 6 years. The placement of sand initially widens the beach by about 50 to 100 feet. The project is designed so that natural erosion of some of the newly placed sand will move offshore and rebuild the beach’s foundation, below the waterline. All of the dunes and sandy beach along the Jacksonville Beaches -- covering the seawall and rocks that once characterized the entire shore – resulted from the beach nourishment program that commenced here in 1978-80.
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