Dredging
Sediment (gravel, sand, and silt) is
deposited in a harbor or river channel
when a river slows down. Accumulated
sediment reduces the channel depth
and can make the waterway unsafe for
navigation. Mechanical and hydraulic
dredges are used to deepen and widen
channels filled with sediment and deposit
the sediment in an approved location.
Mechanical dredges shovel or scoop up
bottom materials and place them on a
barge or scow. The two hydraulic
dredges shown on this poster use
pumps to remove a mixture or water and
sediment ("slurry') from the channel
bottom.
The HOPPER DREDGE is an
ocean-going vessel used to dredge
sediment from the bottom of a
deep-water channel or coastal harbor.
Dredged material is stored in "hopper
bins" inside the ship before disposal in
the open sea or other location.
PIPELINE DREDGE: Vessel commonly
used to dredge sediment from the
bottom of shallow rivers or calm coastal
waters. Dredged material is pumped
from the river or ocean bottom and flows
through a floating pipeline to shore. The
dredged material commonly is used to
restore eroded beaches.
Back to Kids Fun Stuff
Sediment (gravel, sand, and silt) is
deposited in a harbor or river channel
when a river slows down. Accumulated
sediment reduces the channel depth
and can make the waterway unsafe for
navigation. Mechanical and hydraulic
dredges are used to deepen and widen
channels filled with sediment and deposit
the sediment in an approved location.
Mechanical dredges shovel or scoop up
bottom materials and place them on a
barge or scow. The two hydraulic
dredges shown on this poster use
pumps to remove a mixture or water and
sediment ("slurry') from the channel
bottom.
The HOPPER DREDGE is an
ocean-going vessel used to dredge
sediment from the bottom of a
deep-water channel or coastal harbor.
Dredged material is stored in "hopper
bins" inside the ship before disposal in
the open sea or other location.
PIPELINE DREDGE: Vessel commonly
used to dredge sediment from the
bottom of shallow rivers or calm coastal
waters. Dredged material is pumped
from the river or ocean bottom and flows
through a floating pipeline to shore. The
dredged material commonly is used to
restore eroded beaches.
Back to Kids Fun Stuff
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