All deposit activity is subject to a marine licence from Marine Scotland under the Marine (Scotland) Act 2010.ĭuring 2018 a total of 4,191,664 tonnes was dredged and deposited of a total of 13,084,316 tonnes that could be allowed under licence. Dredging activity is expensive so ports will not dredge more than they have to, but often apply for more tonnage than they need in order to avoid paying for a second application fee. Generally licences are for larger amounts than required to allow for flexibility in dredge campaigns. capital dredging is dredging to a new depth, such as to allow for larger vessels in a harbour or in the creation of a new harbour, or in areas where dredging has not occurred in the last 7 years.maintenance (or navigational) dredging, which is routine dredging to previously charted depths and where dredging has occurred in the last 7 years.Dredging and the deposit of dredged material at licensed disposal sites takes place all round the coast. Dredging is needed to maintain the water depth required keep ports operating and this results in waste which must be disposed.
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