Offshore Industry issue 4 2020

Page 26

FOUNDATIONS

Seventy-one gravity-based foundations for Fécamp offshore windfarm THE 497MW FÉCAMP OFFSHORE WINDFARM IN FRANCE HAS COMMENCED CONSTRUCTION. THE WIND POWER PROJECT IS THE THIRD French offshore windfarm to achieve financing. Éolien Maritime France (EMF), a consortium of EDF Renewables, Enbridge, and wpd, are the owners of the windfarm.

T

he project is located in the eastern part of La Manche (the English Channel), off the coast of Haute-Normandie, at approximately 13km northwest of the town of Fécamp. It will consist of 71 Siemens Gamesa 154-7.0MW direct drive wind turbines that will be installed on gravitybased foundations. The total project capital cost is estimated at EUR 2 billion, of which the majority will be financed through nonrecourse project level debt. Fécamp offshore wind project is under-pinned by a 20-year power purchase agreement (PPA), granted by the state in June 2018.

Gravity-based foundations

Royal Boskalis Westminster (Boskalis) in consortium with Bouygues Travaux Publics (Bouygues) and Saipem have been awarded

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the design work, construction, and installation scope for the 71 concrete Gravity Based Structures (GBS) as foundation for the windfarm. The contract carries a total value of EUR 552 million, with a contract value split of 40.5% (Bouygues Travaux Publics), 40.5% (Saipem), and 19% (Boskalis). The 71 wind turbines will be connected to the gravity-based foundations installed on the seabed at depths between 25m and 30m. Within the consortium, consortium leader Bouygues and Saipem are tasked with the design, construction, and installation on the seabed of the gravitybased foundations with an individual weight of up to 5,000t required to provide the stability of the 7MW wind turbines. Boskalis is assigned with the design and preparation of the seabed rock foundation prior to GBS

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