OWNER:
Atlantic Land Corporation
660 Dunlap Drive
Mobile, Alabama 36652
PROJECT
ENGINEER:
Southern Earth Sciences, Inc.
P.O. Box 160745
Mobile, Alabama 36616
DESIGN/CONSTRUCT
CONTRACTOR:
Synergy Earth Systems, Inc.
26240 Equity Drive
Daphne, Alabama 36526
Atlantic Land
Corporation operates a dredge disposal facility that borders Mobile
Bay in Mobile, Alabama. In 1998, hurricane Georges struck the Gulf
Coast and caused major erosion damage to containment dikes at the
facility. At that time, Synergy Earth Systems, Inc. (SES) designed
and constructed a temporary emergency repair to allow scheduled dredging
operations to be performed. In order to allow future use of the facility,
a more permanent dike repair was needed.
Soil borings and
survey information was collected at the site and SES initiated design
of a permanent repair. Since the dredge disposal facility had a limited
remaining useful life, consideration was given in the design to possible
future expansion. Various alternatives were evaluated and the most
economically feasible option was to construct a soil reinforced toe
berm with riprap toe protection. The presence of the toe berm would
allow for future construction of an additional 10-foot high dike on
top of the existing dikes that would increase the capacity of the
facility.
In August 2000,
Atlantic Land Corporation authorized SES to construct approximately
2,500 linear feet of reinforced soil toe berm to repair the previous
hurricane damage. Soil reinforcement was utilized to construct the
toe berm with a 1V on 1H slope to prevent encroachment into adjacent
wetlands. The steep slope was then protected with riprap armor to
prevent erosion damage from wave action. The exterior dike slope was
reconstructed in the repair area and protected from surface erosion
by seeding and installing an erosion blanket. In addition to the berm
construction, the existing weir box was removed and replaced. Also,
interior diversion dikes were also designed and constructed in order
to control flow for more efficient operation during dredging. Soil
reinforcement was utilized to construct the interior diversion dikes
on the soft dredge fill materials in the disposal facility. The repair
work has been successfully completed and the facility is ready for
use
