Dredging presents a wide range
of interesting challenges not found
in normal excavation projects.
Permitting can be time consuming and
expensive. Access can be difficult.
Lake-bottom terrain is typically an
unknown factor and can stall
projects unless careful planning is
implemented. Removing, hauling and
placing sediment efficiently is
challenging. Environmental issues,
such as run-off and shoreline
stabilization must be addressed.
A variety of techniques can be used,
including pump / auger, dragline and
track-hoe dredging. Each has its
place in particular situations.
Pump / Auger
Dredging: This technique
involves a floating barge with a
large pump and submerged auger
similar to two rotary lawn-mower
blades. These auger blades stir up
the bottom and the on-board pump
sucks the material into a piping
system which carries the spoil to
the shore. The spoil material must
be contained in an area to dry and
be later removed. Auger dredging
works best when the lake-bottom is
very sandy, without rock or debris,
as this material will clog the
dredge. Such dredging is
comparatively slow, but can be
useful in situations where the body
of water cannot be lowered or
drained and the bottom is
virtually pure sand.
Dredging: This technique is best
implemented in situations where
access is limited and/or the body of
water cannot be lowered. Dragline
reach is limited to approximately
100-feet and spoil removal is not
very precise. Detail work is
difficult with dragline equipment.
Track-Excavator Dredging: This
technique provides the most flexible
and efficient approach for most
projects in the Southeast.
Long-reach track-excavators (or
track-hoes) specially outfitted with
enlarged buckets and extended booms
offer precise control, high capacity
and up to a 60' reach. When
positioned on specially-designed
track-mats, these excavators can
easily work on the bottom of an
otherwise inaccessible lake-bottom
without sinking into mud or silt.
McEachern Dredging exclusively uses
these fast, efficient (yet
surprisingly quiet) customized
Hauling material in a soft
environment is a major challenge in
aquatic dredging. Typically, areas
that require dredging are not in
close proximity of a spoils area, so
the dredged material may require
hauling a considerable distance.
Even large balloon-tired dump trucks
can easily mire in the soft bottoms
of Southeastern lakes and ponds.
Weight distribution is the key to
success in aquatic dredging. By
implementing truck-mats and
specially designed, rubber
track-equipped dump trucks,
McEachern Dredging provides a unique
and highly efficient solution to