ONE OF SEACORE'S Skate II series jack-up platforms was used during the replacement and extension of a sewage outfall pipeline on steep cliffs at Croyde in North Devon.
The jack-up provided a working access platform for laying the pipeline on the seabed as well as allowing access to the rugged coastline beneath the cliffs.
The £200,000 project for South West Water began with the Skate IIE being positioned and jacked up over the proposed extension and close to the discharge outlet.
Outfall flow was stopped and diverted through a temporary pipeline anchored to the cliff face. Sections of 200mm diameter high performance polyethylene (HPPE) pipe were prepared on the platform deck and lowered overboard. Divers then fixed the pipes and added shuttering.
Concrete cover was batched on the platform and lowered down in skips from Skate IIE using the onboard crane.
Once finished, the platform was moved and jacked up again on a rock ledge at the base of the cliff face. The remaining pipe was replaced with welded 200mm diameter HPPE pipe connected to the new seaward section.