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suction hopper dredge; but for rock works, drilling and blasting along with mechanical excavation may be used.
*Land reclamation: dredging to mine sand, clay or rock from the seabed and using it to construct new land elsewhere. This is typically performed by a cutter-suction dredge or trailing suction hopper dredge. The material may also be used for flood or erosion control.
*Maintenance: dredging to deepen or maintain

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