• Offshore Wind

  • Load-in & load-out

  • Heavy transport

  • Increased safety

  • Parallel operations

  • United Arab Emirates

Hollandse Kust Zuid Offshore wind farm’s Alpha jacket is ready to begin its voyage to the North Sea.

Heavy lifting and transport specialist Mammoet has been contracted by Eversendai Offshore for the loadout of the jacket foundation and accompanying piles for TenneT’s Hollandse Kust Zuid offshore wind farm project in the North Sea. Covering an area of 235.8 km2, the Hollandse Kust (Zuid) Wind Farm Zone (HKZ) is a designated wind farm zone located off the Dutch province of Zuid-Holland.

Mammoet’s scope consisted of weighing, land transport, and load-out of the jacket and pile sections at Eversendai Offshore’s fabrication yard Ras Al Khaimah in the United Arab Emirates. Following operations to weigh the jacket and determine its center of gravity, the six-legged structure – weighing 3,200t and measuring 40m long, 47m wide, and 48m high - was safely transported from the fabrication yard to the quayside.

load-out operation.jpg

It was then carefully loaded out, using 128 axle lines of SPMT and six power pack units (PPU). Separately, three 220t long piles measuring 75m long, and three 184t short piles measuring 65m long were loaded out and positioned on the deck of the sea-going vessel. Detailed engineering calculations, thorough planning, and comprehensive risk assessments of the loadout operations and procedures ensured the safe handling of the jacket and piles.

wind farm jacket load out by mammoet.jpg

They are now ready to depart the United Arab Emirates bound for the Dutch North Sea. The 1.4GW Hollandse Kust Zuid zone comprises four offshore wind farms that will be connected to the HKZ Alpha and Beta substations. Petrofac is responsible for the engineering, procurement, construction, and installation of both substations. Eversendai Offshore is in charge of the engineering and fabrication of the jackets and accompanying piles for the substation platforms at its fabrication yard in RAK Maritime City, Ras Al Khaimah in the United Arab Emirates (UAE).