barrier island status report - Coastal Protection and Restoration ...

linear feet of berm on Shell Island started on October 9, 2010 and was completed by
November 23, 2010. Approximately 777,000 cubic yards of sand was placed along the
island.
b. Berm Reach W9 (Pelican Island): Construction of berm reach W9 along Pelican Island
started on July 18, 2010 and was completed by October 2, 2010. Sand was placed within
the construction template, which was identical to the template used for the other berm
reaches. The template was superimposed on the existing island and within the footprint of
the proposed Coastal Wetlands Planning, Protection, and Restoration Act (CWPPRA)
Pelican Island Restoration Project (BA-38-1). A total length of 12,700 feet of berm was
constructed and approximately 1,294,000 cubic yards of sand was emplaced within the
berm along Pelican Island.
c. Berm Reach W10 (Scofield Island): Construction of berm reach W10 on Scofield Island
started on September 13, 2010. Approximately 935,000 cubic yards of sand was placed
between September 13 and November 23, 2010 for constructing approximately 14,755
feet of berm. The construction template for berm reach W10 was identical to the other
berm reaches. The berm was constructed within the footprint of the proposed CWPPRA
Scofield Island Restoration Project (BA-40).
2.3.2 Projects under Construction
1. Riverine Sand Mining/Scofield Island Restoration (BA-40; Berm Funds; 2013) – The goals
of this project are to mitigate breaches and tidal inlets in the shoreline, reinforce the existing
shoreline with sand, increase the width of the island with back barrier marsh to increase
island longevity, and re-establish a sandy dune along the length of the shoreline to protect the
back barrier marsh platform from sea level rise and storm damage. The beach-dune habitats
are constructed by the sand dredged from a borrow area in the Lower Mississippi River via
22 mile long pipeline and the marsh platform from offshore borrow source of mixed
sediment. Although this project was designed under CWPPRA, construction began in
December 2012 using Berm to Barrier Funds. This will create approximately 11,400 foot
long beach and dune fill to close the breach areas and restore/protect the erosive beach. The
dune component includes a 50 foot wide crest width at +6 feet NAVD88. The beach fill
template includes a 100 foot wide construction berm at +4 feet NAVD88. The surface area of
the proposed beach platform is approximately 223 acres measured at +4 feet NAVD88. The
required fill volume is approximately 2.03 MCY (required excavation volume is
approximately 2.64 MCY). An approximately 11,800 foot long marsh platform on the bay
side of Scofield Island was constructed. The surface area of the proposed marsh platform is
approximately 375 acres with target marsh platform elevation of +3.0 feet NAVD88. The
required fill volume is approximately 1.74 MCY (the required excavation volume is
approximately 2.79 MCY). It may be noted that Emergency Berm W-10 was built in front of
this island using about 0.964 MCY of sand.
2. Shell Island Restoration – Shell Island is a critical component of the Barataria shoreline
which has been breached into two islands – east and west. Restoration of these two islands
was initially included in LCA BBBS Project. The Shell Island Restoration project would
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