Icon

Blackout on Bornholm

A tugboat with a coal barge lost its anchor and damaged the submarine cable between Scania and Bornholm.
JD-Contractor A/S located the anchor causing the damage and repaired the submarine cable. 

A tugboat on its way from Estonia to Avedøre in Copenhagen with a barge full of coal lost its anchor and damaged the submarine cable between Scania and Bornholm.

JD-Contractor A/S was hired to locate and repair the cable damage and furthermore to find the anchor that caused the damage to the submarine cable.
    
Our diving and support ship C/S Cable One was quickly sent off to the area where it located the submarine cable, which was torn in two, at a position of about 15 kilometres from the Swedish shore and at a depth of 50 metres. From C/S Cable One the loose ends of the submarine cable were sealed in order to minimize further entrance of water.

The next assignment for C/S Cable One was to find the anchor that had left a clear drag mark in the seabed. In the search for the anchor we used a ROV, which had to sail no less than 48 miles (90 kilometres) before the anchor was located in another power cable between Sweden and Germany.

Our biggest cable lay barge Henry P. Lading was then loaded in Kalundborg with more than 3 kilometres of spare cable, which replaced the damaged part of the submarine cable.

C/B Henry P. Lading picked up 3,029 metres of the damaged cable and layed out and spliced 3,162 metres of the new cable and Bornholm again received power from Sweden.