Dredging

Dredging is excavation movement or operations regularly carried out in part underwater, in shallow seas or fresh areas with the normal and usual purpose of scraping sediments off the floor and in general raising the depth of water in a routing channel used by shipping, yachtsmen and barges.
Other common dredging reasons include:
* Spot excavations lowering the sediment beds as far as automatically possible preparatory to major waterfront construction of a bridge, pier, or dock foundations.
* Harvesting storm detached sands and restoring a swimming beach.
* Waterways management and maintenance for flood and corrosion control.
It is fair to say that without the many and almost non-stop dredging operations world wide, much of the world's commerce would screech to a halt in a few months and many of us would freeze, starve, or lack desired goods, for the world's ships are of essential importance to the lifestyle of the developed world's populations. Moreover, recreational boating would be severely forced to the smallest vessels. The majority of marine dredging operations (and the disposal of the dredged material) will require that appropriate licenses are obtained from the relevant narrow authorities.