Bilfinger Berger Magazine 2/2008

FOUNDATIONS FOR RÖDSAND 2 AND ALPHA VENTUS
Following the foundation work for Horns Rev 2, Bilfinger Berger Civil has received more important offshore orders. Eon Sweden has commissioned the Company and its Danish partner Per Aarsleff to build the foundations for the Rödsand 2 offshore wind farm. This development near the island of Lolland in the Baltic Sea has a capacity of around 200 megawatts and is an extension of the existing Rödsand 1.
The 90 concrete foundations weighing around 1,300 tons are prefabricated on land as finished units, then placed on the seabed. Installation will be completed by the end of 2009. The order is valued at just under €80 million. From 2010 onwards, Rödsand 2 will provide enough power for 200,000 homes.
Bilfinger Berger is also involved in the German offshore Alpha Ventus wind farm not far from Borkum in the North Sea. As part of a consortium of companies, the Group has been constructing the centerpiece of the wind farm, the central transformer station. The platform is built on three levels,with a helicopter deck, main deck and cable deck. It stands on a lattice frame anchored to the seabed with piles driven 30 meters into the ground. Cables leading from the 12 planned new five-megawatt-class wind generators will meet at the transformer station where the voltage is raised to 110 kilovolt. The power is then fed as three-phase current through an 18-centimeter thick sea-cable via the island of Norderney to the mainland. Alpha Ventus is set to come on stream in autumn 2009. (si)

Bilfinger Berger Magazine 2/2008