Ecosse Subsea completes project for DONGProjects and Operations // January 16, 2015
Ecosse Subsea's SCAR seabed plough on Havila Jupiter.
Ecosse Subsea Systems (ESS) has successfully completely a boulder clearance and seabed preparation campaign on behalf of DONG Energy.
The subsea engineering specialist cleared almost 50,000 boulders and other obstructions from 33 routes spread over a distance of 40km at the Westermost Rough windfarm, located eight kilometres off the Yorkshire coast.
ESS deployed its multi-functional SCAR seabed plough and, working from Havila Jupiter, completed ploughing and surveying operations within 20m corridors located between 33 turbines and the offshore sub-station.
The 72 day campaign, which had been mobilised in a 47-hour time-frame from Aberdeen, was delivered on time and within budget, and demobilisation took less than 24 hours. ESS’s highly experienced offshore management and operations team included survey and ROV specialists.
The workscope covered multi-pass boulder clearing on up to 33 routes, covering an area of 720,000m2 and involved complex seabed navigation with ROV back-up to ensure pinpoint accuracy between passes.
The Westermost campaign was ESS’s third seabed clearance contract in the renewable sector, following on from Baltic 2 and Humber Gateway projects.