Most common mechanical dredges used on Great Lakes projects are the grab or bucket type dredge. Mechanical dredges remove the sediments via mechanical methods which can include grab dredges (clamshells & buckets), backhoes or bucket ladder dredges. ![]() Sometimes a cutterhead is attached to the dredge intake to loosen hardened material. Hydraulic dredges use hydraulic pumps to produce a slurry of the dredged material, are typically used when there is much material to remove and it can be easily transported long distances via a pipeline attached to the dredge.
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