Menck has signed a contract with Seaway 7, the renewables business unit of Subsea 7, to provide an MHU 3500S hydraulic hammer and spread for the installation of 140 monopile foundations for Vattenfall’s Hollandse Kust Zuid I–IV (HKZ) offshore wind farm project, located between 18 and 36 km off the Dutch coast.Menck’s scope of work includes the manufacture, preparation and operation of its MHU 3500S hammers, which are capable of installing monopiles with a 7.5-m outer diameter. The HKZ offshore wind farm is to be equipped with Siemens Gamesa’s 11MW wind turbines supported by 7-m-outer-diameter monopile foundations. The offshore operations phase is expected to take eight months and will be split into two installation campaigns.