![]() The design of dredges varies depending on. The dredged material can vary greatly (peat and organic soils, cobbles, clays, boulders, silts, broken rock, sands, rock and gravels, cemented soils and corals), and dredging depth can vary from a few meters to more than a hundred meters. Dredges are rigid structures that are towed along the seabed to harvest bivalves such as scallops, oysters and clams.
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