In their role as ‘cable package managers’, ETA has provided the overall project management of the offshore cable including specification, procurement and installation on many offshore wind projects such as Q7 (Princess Amalia) Windpark (120 MW), Belwind (Bligh Bank) Windfarm (phase 1 – 165 MW) and on the Tees Offshore Windfarm (62 MW).
Alongside our work in the offshore wind market below, ETA’s expertise have been acquired from their background in the installation and maintenance of subsea cable in the traditional fields of power cable, telecom, or offshore oil and gas projects as well as from their extensive involvement with other offshore renewables such as Tidal Energy.
A sample of ETA’s varied experience in the Offshore Wind market can be found below.
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Offshore Wind Power Cable Clients and Project Examples
ETA provided onsite day to day Project Management services for all aspects of the offshore cable planning, procurement, installation and protection.
ETA provided extensive planning services including: route planning, layout planning, cable type specification, and cable supplier selection. ETA also provided the following services during the operations: cable delivery strategy, route clearing, horizontal directional drilling, cable installation, protection strategy, cable burial, scour protection, termination, and commissioning.
Following this, ETA provided ongoing project management and engineering support to both Econnect and Mayflower. Key areas of responsibility included technical aspects of infield and export cable installation, planning and logistics, including use of GIS to integrate survey and installation drawings and data. ETA provided the Offshore Superintendent for the installation of the infield cabling, utilising Mayflower's innovative subsea cable lay and burial tractor.
ETA's engineering division also supplied additional cable installation equipment under a bespoke design and build contract.
ETA project managed the full cable procurement and installation package on behalf of the windfarm owners (Eneco) including route survey, burial assessment and final determination of the cable lengths, types, routes and burial strategies. Soil types varied between mobile sands and clays.
Cable protection was achieved utilizing a jetting tracked ROV and rock placement at foundations which also provided scour protection.
Particular seabed soil conditions included sand waves requiring careful management. Cable protection was achieved utilizing a Jetting tracked ROV, Jetting sledge and rock placement at foundations.