Dredging is an excavation activity usually carried out underwater, in shallow seas or freshwater areas with the purpose of gathering up bottom sediments and widening as in the Erie Canal. This technique is often used to keep waterways navigable and creates an anti sludge pathway for boats. It is also used as a way to replenish sand on some public beaches, where sand has been lost because of coastal erosion.
Capital (or new) dredging projects can be both extensive and expensive. Maintenance dredging is often a regular, perhaps annual ongoing, long-term activity. In either case, what are the key elements of dredging? The dredging process consists of the following three elements:
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