Jan de Nul, on behalf of Eneco, has started preparations for work on the export cable to the 129 MW Eneco Luchterduinen offshore wind farm on the beach at Noordwijk. The cable will have to be buried deeper into two places beyond the surf. The work is expected to last until the end of October.
In 2011, a ‘sand motor’, an innovative form of coastal defense, was created off the coast of Monster. This proved successful and raised the seabed off the coast of Noordwijk. This took place before the export cable was laid to the Eneco Luchterduinen offshore wind farm. Since then, constant movement of the sea has partially washed away the sand locally. As a consequence, the cable now lies buried about 1.5 metres deep beyond the surf in two places beyond the surf.
Jan de Nul will use their ‘Sunfish’, an Intertidal Trenching Vehicle in jetting mode, to bury the cable deeper into the seabed – about 2.5 to 3 metres- at the two locations. The Sunfish has been developed by Jan De Nul to bury cables in shallow waters by injecting water under high pressure so that the seabed temporarily softens locally.
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The ‘Sunfish’ will be assembled on the beach and go into the sea at the end of September to mid-October to carry out the work on the cable. The work will be monitored 24 hours a day from containers positioned against the dunes. The ‘Sunfish’ will stay in the sea mainly beyond the surf.
After the work is completed, the ‘Sunfish’ will return to the beach where it will be dismantled. The work is expected to last until the end of October.
The Sunfish also has a ‘brother’: Moonfish. In the spring of 2022, Moonfish will be deployed at the Hollandse Kust Noord – West Alpha project, located a little further away, in Wijk-aan-Zee. Source: Eneco