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Project Summary
ATM
was awarded a comprehensive coastal engineering services contract
by Indian River County to develop specific engineering designs
for four distinct critically eroding project areas (totaling 8
miles) along the county's Atlantic Ocean shoreline.
Initial efforts
by ATM included a county-wide offshore sand source investigation
and environmental resource mapping and assessment of the nearshore
hardbottom. Seventy-seven (77) jet probes were conducted to delineate offshore
areas which were subjected to additional investigation.
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Before
After |
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A total
of 70 vibracores were obtained and sediments analyzed, from which
two distinct borrow areas were identified. The total volumetric
yield capacity of these two areas was determined to be in excess
of six million cubic yards. 47 line-miles of diver-towed video
transect mapping of the nearshore hardbottom resources was completed,
after which characterization and planform mapping were conducted.
The first shoreline segment for restoration—the Ambersand shoreline
(2.5 miles in length)—was submitted for regulatory agency approval,
permits were secured, an ECL established, and contract documents
prepared, issued and bid. Central to the approval process was
the designation of five acres of mitigative reef (to offset impacts
to the extension nearshore hardbottom) and the preparation and
submittals of an Environmental Assessment document.
Project construction
was completed in three months with a total of 536,000 cubic yards
of sand placed on the shoreline, much of which is extensively
utilized by the public.
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