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Dredged Material Management
Area DU-2
DU-2 Buffer Area From Street
DU-2 Entrance
Dredge in Waterway Adjacent
to DU-2
Dredge Pipeline Entering Site
Pipeline Into Containment Basin
Water Release Structure At Far
End of Basin
Dredge Water in Basin
Water Release Structure
Clean Water Leaving the Site
Dredged Material Left in Basin
After Water Release |
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Updated 10/13/06
PROJECT
STATUS REPORT
Dredge Material Management
Summary
The identification and permitting of suitable dredged
material management areas for the Atlantic Intracoastal and Okeechobee Waterways
in Florida has become increasingly difficult. This has resulted from the nature
of dredging, the requirements of handling and storing dredged material, and the
environmentally sensitive and rapidly developing areas in which these operations
are performed. In response to this situation, the Florida Inland Navigation
District (District) initiated in 1986 a program of long-range dredged material
management. When fully implemented this program will provide a permanent
infrastructure of management facilities for all maintenance material dredged
from the 398 miles of Intracoastal Waterway channel
connecting Fernandina Harbor in Nassau County with Miami Harbor in Miami-Dade
County and for 15 miles of the Okeechobee Waterway from its confluence with the
Intracoastal Waterway to the first navigation lock.
To date this planning effort for the
Intracoastal Waterway has identified approximately 23 million cubic yards (cyds.) of
sediment to be maintenance dredged from 398 miles of waterway channel over the
next fifty years. Of this dredging volume, 12 million cubic yards of sand has
been identified as potentially beach quality material and 8 permanent beach
placement areas have been identified and designed for these materials. The other
11 million cyds. of sediment contains levels of silt that preclude this
material from being placed on the beach. These sediments will be temporarily
stored in 53 upland containment sites where the material will be selectively
excavated and used beneficially. Additionally, at least 3 million cyds. of beach
quality materials will be offloaded from existing sites in the vicinity of ocean
inlets and transported to ocean beaches thereby returning this sediment to the
coastal system.
To date this planning effort for the
Okeechobee Waterway has identified approximately 1 million cyds. of sediment to
be maintenance dredged from 15 miles of waterway channel over the next 50 years.
Of this amount 215,000 cyds. is beach quality and will be returned to an ocean
beach and 785,000 cyds. is not beach quality and will be managed in
4 upland
sites.
The District's program, executed in close cooperation with
the Jacksonville District Corps of Engineers, comprises three main elements: (1)
a two-phased plan development and property acquisition element, (2) a facility
permitting and construction element, and (3) a facility operation element.
Program execution begins with the development of long-range dredged material
management plans for the waterway on a county-by-county basis (Phase I of the
planning and property acquisition process). Upon finalization of each plan,
Phase II of the planning and property acquisition process begins with site
boundary surveys. The process continues with detailed environmental site
characterizations, soils testing, topographic surveys, preliminary facilities
design and site plans, site operation and management plans, and a summary of
expected costs for site development and operation. All of this information is
then used for property acquisition and facilities permitting.
Once dredged material management needs have been
addressed, resources can be directed to the control of sediment in-flow into the
waterways. Each long range dredged material management plan includes a general
identification of the source of the sediments entering into the waterway
channel. This sediment in-flow is being addressed by the District and other
government agencies through cooperative projects involving inlet management,
stormwater control and shoreline stabilization. If successful, sediment in-flow
reductions will save local and federal maintenance dredging funds, increase the
length of time to fill the upland sites to capacity, reduce the impact of
suspended sediments on the environment of Florida’s waterways and increase
retainage of these sediments in our beach and upland systems.
PROJECT MANAGER
David K. Roach, Executive Director
Florida Inland Navigation District
1314 Marcinski Road
Jupiter, FL 33477
(561) 627-3386
(561)624-6480 FAX
e-mail: droach@aicw.org
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