Danish marine contractor Peter Madsen Rederi A/S (PMR) has successfully 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 well ahead of schedule.

Working with a very 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 approx. 30,000 m3 of seabed, dumping of the material offshore, procurement, transport handling and installation of around 20,000 m3 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.

PMR’s track record in the offshore wind industry includes working on some 25 offshore wind farms in Denmark, the UK, Germany, Sweden, Holland and France. The company has handled a wide range of projects including boulder clearance, installation and repair of scour protection, nearshore trenching and backfilling, installation and repair of stone beds, seabed levelling, ballasting of foundations, dredging, multibeam surveying etc.

PMR, founded in 1954, owns and operates six specialized vessels equipped with either hydraulic excavators or grab wire cranes.

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