2012, EGS, Lincs Offshore Wind Farm, Post-construction Hydrographic Surveys of Lincs Export Cables

Description

EGS (International) Ltd was contracted to undertake a hydrographic, post-construction survey of the LINCS offshore wind farm export cables extending from the substation to the 0 metre Chart Datum (CD) contour. Whilst survey operations were underway, the contract was extended to cover a hydrographic survey to assess seabed scour around 4 wind farm turbine bases and any cable exposure along the collector and inter-array cables, as well as a sub-bottom survey around the Westmark Knock Navigation Buoy in the Wisbech Channel.

The survey aims were as follows:
a) Conduct a survey of the export cable routes to identify any exposure of the cable or change in seabed morphology.
b) Survey (using SSS) around three faces of the Offshore Platform (OSP) to check the cables exiting the J-Tubes to their touchdown point on the seabed.
c) Obtain Sub-bottom data around the Westmark Knock Navigation Buoy in the Wisbech Channel.
d) Conduct a scour survey of the seabed at the base of 4 turbines within the LINCS Offshore Wind Farm. These 4 turbines were LS61, LS62, LS63 and LS64.
e) Survey (using SSS) the inter array cables to identify any cable exposure.