Gold dredging was conducted with the Sumpter Valley Gold Dredge. Gold dredges in Alaska had a stacker that was a fixed part of the dredge. New Jersey Harbor dredge spoil disposal. They may also be used to dredge for submerged objects. The excavator dredge cost $6,000,000 to build. Increasing thickness of organic sediments resulted in the necessity to dredge the lake. A dredge to clear the harbour was towed from Australia. He planned to dredge and drain the Everglades for development. The East River separates Brunswick from Andrews Island, a dredge spoil site. It can dredge to a water depth of 155m. In some areas, a scallop dredge is used. An airlift is a type of small suction dredge. Boersgard finds itself stuck between the sea and a Dredge host. The government thus invested two million yuan in 1976 to dredge the lake again. It is sometimes called a suction dredge.