e. Dredging is the process of extracting solids from their natural environments. Dredging or
hydrolicking is used to extract the following solids:
Clay
Gravel
Sand
Gold
Magnesium
Tin
(1)
A typical dredging operation is shown in Figure 2-20.
Figure 2-20. Typical Dredging Operation.
(2) Dredging with suction devices or drag buckets is used when ores are found mixed
with water in their natural state. Gravel, sand, clay, and other ores are extracted by these
methods. Dredges are of the intermittent or continuous class. The intermittent class includes the
dipper dredge (Figure 2-21) and grabbing dredge (Figure 2-22). The continuous class includes the
ladder dredge (Figure 2-23) and hydraulic dredge (Figure 2-24).
NOTE:
Normally, you should find a barge nearby a dredge for hauling the solids off to shore.
Figure 2-21. Dipper Dredge.
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