LERWICK, UK – Lerwick Port Authority in the far north of the British Isles has received its largest offshore structure to date for decommissioning.
CNR International’s 14,200-metric ton (15,653-ton) Ninian Northern platform topsides was delivered last Friday by Allseas’ cargo barge Iron Lady.
Earlier, Allseas’ Pioneering Spirit had removed the topsides in a single-lift operation from the Ninian oil field, 100 mi (161 km) northeast of Shetland. This was the first complete northern North Sea topsides load-in at Lerwick: Veolia/Peterson is responsible for dismantling the structure, with a 97% recycling target.
Also on Friday, the Authority inaugurated a new, heavy-duty decommissioning pad at Dales Voe Base, designed and project-managed by Arch Henderson and constructed by Tulloch Developments.
This features an impermeable surface and a 60-metric ton/sq m (66-ton/sq m) load compatible with the quayside capacity. In addition, the quayside design provides an 800-metric ton/m (881-ton/m) loading for transfer of the topsides from the barge across the quayside.