Dredger mining is the extraction of sediment from bodies of water to harvest valuable materials like gold. Suction dredging is popular for recreational gold mining, while commercial miners use other forms. Environmental concerns include altering river shape and releasing mercury. Some areas have placed limits on dredging, but miners argue it can benefit river ecology. […]
Scallop dredgers are fishing devices that scrape the seabed to catch shellfish, including scallops, oysters, and crabs. They can cause damage to the seabed and bycatch of other species. Scallops can also be farmed or hand-harvested by divers. Dredges consist of a mesh net attached to a metal frame that is towed behind a motorized […]
A backhoe dredger is a machine used to excavate a sea bed to keep waterways navigable. It can be mounted on a ship or barge and is similar to a land-based excavator. The vessel or barge often has the backhoe dredger as a permanent structure, and it is equipped with diesel engines and hydraulic systems. […]
