Dutch Dredging Kicks Off Port of Den Helder Scheme

Image source: Dutch Dredging

Earlier this week, Baggerbedrijf de Boer/Dutch Dredging B.V. started works under the contract “Dredging Het Nieuwe Diep”, which was commissioned by the Port of Den Helder.

Under the deal, Dutch Dredging is expected to carry out the remediation of 200,000m³ of partially contaminated spoil until mid-December.

The survey vessel “Hydrograaf” started the pre-dredge survey on the 9th of September, a so-called “baseline measurement” after which the project will be carried out in 3 phases.

According to the contractor, in Phase 1, a bed leveller equipped with a so called dirt-plough will be employed. This is due to the fact that the top layer of silt contains a considerable amount of soil-foreign material.

The dirt will be ploughed to free locations where it can be dredged by means of a grab dredger and will be discharged into skips on the quay for removal and disposal, the company reported.

During the Phase 2, a bed leveller, trailing suction hopper dredger and a grab dredger will subsequently commence with the dredging works to the north and south of the Moorman bridge, restoring the required depth in the area.

For the Phase 3, a grab dredger will be used to remove the contaminated sediment. The dredged material will be loaded in to the barges, which will transport the sediment to a depository for polluted sediment.

The project team includes grab dredger “Rival”, bed levellers “Peter” &  “Janneke” and trailing suction hopper dredger “Adelaar”. The barges owned by sister company Van der Waal will be used for disposal of the (contaminated) material.

 

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