Stones put to bed

Danish marine contractor Peter Madsen Rederi A/S (PMR) has completed another stone bed installation job for jack-up installation vessels. The new set of stone beds were constructed in the port of Esbjerg in Denmark and completed ahead of schedule.

Working with a tight time schedule, PMR were tasked with the construction of a new set of stone beds for the safe loading of the WTGs for the Vattenfall-owned
Horns Rev 3 offshore wind farm in the Danish sector.

The stone beds will be used as a stable platform for the jack-up installation vessel and had to be installed in time for the first load-out.

The project comprised of capital dredging of approximately 30,000m3 of seabed, dumping of the material offshore, procurement, transport handling and installation of around 20,000m3 of stones as well as extensive multibeam surveying.

"Building on vast experience from similar projects, we executed the project ahead of schedule in less than a month, says Michael Normann," CEO at PMR.

The company has previously installed similar stone beds both in ports and offshore to ensure that the installation vessels can jack-up safely with minimum penetration of the seabed and without damaging the port structures.

The project will feature 49
V164-8.0 MW turbines in total. When complete, expected 2020, the 406.7MW Horns Rev 3 project is expected to be capable of providing enough power to satisfy the annual electricity consumption of 425,000 Danish households.

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