Berwick Bank A&B Offshore Windfarm
Dunbar, Scotland
Project synopsis
Civils, structural and geotechnical detailed design of civils infrastructure for Onshore Export Cable, Onshore Converter Station and associated grid connection for an Offshore Windfarm
Contractor
Jones Bros Ltd
End client
SSER
Tony Gee is undertaking a pivotal role for Jones Bros Ltd. in the detailed design of the onshore civils infrastructure for the connection of Berwick Bank A&B Offshore Windfarm to the National Grid. Berwick Bank A&B is capable of generating 4.1GW of clean electricity making it one of the world’s largest wind farms in development.

Our scope includes the infrastructure for the Onshore Export Cables, Onshore Converter Station and associated grid connection the Scottish Power Energy Network 400kV Grid Substation in Branxton, near Torness, in East Lothian. This includes the design of temporary haul roads, permanent access roads, access junctions, joint bay civil infrastructure, culverts, landfall platforms, construction compounds, protection to third party HV cables, Onshore Converter Station platform earthworks and drainage features including swales and detention ponds.
Tony Gee has supported at Value Engineering workshops to optimise and rationalise solutions to reduce project programme durations, costs and amount of embodied carbon. This support has included the optimisation of onshore civils infrastructure associated with the Onshore Export Cable watercourse crossings, temporary haul road alignments and earthworks requirements. The adoption of a geosynthetic temporary haul road design has reduced excavation requirements, reduced construction depths for low bearing capacity soils, provides a filtration layer for drainage and assists with existing ground reinstatement. The Onshore Converter Station value engineering workshop provided a review of earthworks, highways and drainage options to reduce construction programme and costs.
Tony Gee has worked collaboratively as part of a multidisciplinary team assembled by the client including horizontal directional drilling and electrical cable design teams. Tony Gee has developed an efficient construction methodology with Jones Bros and liaised with SSER’s project teams throughout the detailed design. Tony Gee has also supported Jones Bros with meetings with external project stakeholders including local council highways teams.