Over the last couple of years, DEME Group has been tasked with maintaining the navigational width of the ports of Calais and Boulogne-sur-Mer for the region ‘Hauts de France’.
Additionally, the company performed maintenance dredging of Gravelines port for the ‘Département du Nord’.
The multi-year contract for Boulogne-sur-Mer and Calais called for two dredging campaigns per year (‘autumn’ and ‘spring’ campaigns).
The company’s trailing suction hopper dredger Charlemagne was one of the vessels that kept these vital supply routes open.
The 2002-built Charlemagne was tasked with performing maintenance works at these ports and disposal of the materials at sea.
Overall, the French scheme included:
- Maintenance dredging works in the three ports;
- Dredging using a trailing suction dredger and offshore piling;
- Levelling by towing vessel (Harrow) in Calais and Boulogne-sur-Mer;
- Desilting the sluice chambers by deploying divers.