Further fleet expansion for Jan De Nul

19 Mar 2015
The multi-purpose vessel Isaac Newton was launched in Croatia last month

The multi-purpose vessel Isaac Newton was launched in Croatia last month

The Belgium-based global dredging major Jan De Nul continues seven years of fleet expansion with the launch last month of the multi-purpose vessel 'Isaac Newton' and an order for what will be the world's largest cutter suction dredger.

The 12,500 dwt, 138m LOA Isaac Newton was launched at Croatian shipyard Uljanik Brodogradiliste, which will commence work on the CSD JDN8069. With Jan De Nul focusing on niche markets, Isaac Newton will be capable of installing subsea cables, trench dredging, and subsea rock installation, enabling the operator to meet client requests to have a project executed by one contractor or one vessel, thus reducing mobilisation costs.

In cable installation mode, the vessel will be capable of transporting and laying cable in a single length with a total weight of some 10,000 tonnes. Powered by two 3,000kW engines, the vessel will be capable of 12.5 knots and able to accommodate 75 persons.

The order for the mega-cutter suction dredger with the same yard will see JDN8069 bristling with 40,975kW of installed power, some 50% more than Jan De Nul's J.F.J. De Nul, which is currently the largest cutter suction dredger in the world. This will include two 8,500kW inboard pumping installations and another submerged pump of the same capacity. Cutter power will also be 8,500kW feeding an 1,100mm diameter suction pipe. Twin 3,000kW propulsive units will take the 151.3m LOA, 36m beam vessel to 12 knots. The vessel will be capable of dredging hard rock and other materials to depths of 45m. Able to accommodate 67 persons, JDN8069 is due for completion in February of 2017.

Meanwhile, Jan De Nul's environmental subsidiary Envisan has won a port basin rehabilitation project with the port authority and city council of Trondheim in Norway. Trondheim's aim is to restore the port basin to its desired depth and halt the further spread of contaminated sediments. Dredged sediments will partly be placed in an underwater cell and partly be re-used for land reclamation. Dredged areas will be covered with a gravel layer to prevent the further spread of residual contamination.

The project will start in the Spring of this year and continue to April 2016.

By Larz Bourne

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