Dutch Dredging Kicks Off Port of Den Helder Scheme

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.

Image source: Dutch Dredging

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.