Key data

  • Client: DanTysk Offshore Wind GmbH c/o Vattenfall Europe AG
  • Planning: 2009 - 2010
  • Construction: 2011 - 2014
  • Scope of planning:

    Tendering in accordance with the FIDIC Yellow Book
    Assistance in contract award
    Study of crossing structures
    Drafting of crossing agreement

    Basic evaluation
    Preliminary design
    Preparation and participation in contract award

Dan Tysk offshore wind farm, North Sea
80 wind turbines with 3.6 MW output each

This offshore wind farm is located just on the German side of the border between the country’s territory and that of Denmark. To the north, the wind farm borders with the Danish “Dan Tysk” wind farm. The water depth in the area varies between 20 and 30 m. 80 wind turbines, each with an output of 3.6 MW, were erected. The internal wind farm cabling was tendered as a Design & Build contract in accordance with the FIDIC Yellow Book, based on the technical solutions of the preliminary design. Inros Lackner prepared the technical tender documentation, consisting of basic requirements, contract award documents and functional performance description including price lists, in accordance with the FIDIC Yellow Book. The scope of work also included the technical and financial evaluation of quotations, and client support during the contract award stage.

In the southern part of the wind farm, a major transatlantic telecommunications cable crosses wind farm cables. A clearance and crossing study was carried out, which included the development of four cable relocation/crossing options and a risk assessment. Considering all appropriate conservation requirements, and also technological parameters such as durability and ease of maintenance, the preferred option was selected. Finally, the required crossing agreement with the operator of the telecommunications cable was drafted.

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