Simplistically, the dredge is designed to lift these materials of interest from the bottom up into the dredge. We need to add one more condition, and that is: the material of value on the bottom must be unconsolidated, such as sand and gravel, or it must be very soft. Of course, the only reason for floating a dredge is to recover something of value at the bottom of this body of water. In many cases, this is a natural body of water such as a river or a lake, but in others, it is a manmade pond or small lake. Accordingly, a dredge requires a body of water in which to operate. A dredge is the principal piece of equipment used in the dredging method and, essentially, a dredge is a boat containing specialized mining and materials handling components.
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