Seabed dredging in full swing


On 20th July 2014, the second, larger dredger by the Netherlands-based contractor Van Oord commenced dredging works aimed at the seabed deepening along the Container Terminal to 14 metres. By the end of August, the trailing suction hopper dredger Dravo Costa Dorada will remove about 90 Olympic-size swimming pools of sea sediments (silt) that will be pumped to the disposal sites in the port's hinterland. For this purpose, a three-kilometre long pipeline was laid over the last weeks. The dredger will operate 24 hours/day. 

The vessel is fitted with a draghead which operates during the navigation. The dredged material which is temporarily stored in its own hopper is then pumped through a pipeline to the disposal site. Van Oord commenced the works last week when a smaller dredger started deepening the seabed under the construction of the container quayside which is technically particularly challenging.

The Dravo Costa Dorada in Basin I of Port of Koper

A draghead is attached to the end of the pipe and lowered to just above the bed, making it possible 
to regulate the mixture of sand and water that it takes in.(Source: Van Oord)