Damen to produce new aggregate dredger

Hanson UK Dredger Damen MAD 3500. Credit: Hanson

Aggregates production company Hanson has given Damen Shipyards green light to build a new marine aggregate dredger, MAD 3500, to join its fleet. The MAD 3500’s limited dimensions are suited to operate within the Shoreham lock, on the south coast of England, where it will be deployed. With the structure of the lock passage, MAD 3500 fits in well with an overall length of about 103.5 m and deadweight of just under 6,800 tonnes and speed at loaded draught of 12.5 kt.

The dredger will also be used to extract aggregates in the British Channel and North Sea. Features within the design, such as a 1,400 kW permanent magnetic motor, will power the dredge pump to collect aggregates at up to 55 m. This particular vessel will also feature a dry unloading system built by Damen’s partner PLM Cranes BV.

The bow is enclosed to protect deck equipment, all dredge pipes are situated above main deck level for safety, and the modular construction of the DDE dredge systems allows easy replacement of parts on the piping and screening installation. “Marine aggregates are critical to Hanson UK’s business as they are used in around half of our ready-mixed concrete plants and are becoming more and more important,” said CEO Simon Willis.

The latest investment is part of the company’s strategy to replace its existing marine aggregates fleet, already consisting of six dredgers. The new dredger, estimated to be able to carry up to 7,000 tonnes of marine aggregate per trip, is expected to be delivered in the first quarter of 2021. The dredger will be built in Galați, Romania, with a modular design allowing for easy replacement of worn parts in turn, increasing operational and maintenance savings. The dredge equipment and screening installation will be constructed in Nijkerk, the Netherlands.