Dogger Bank Wind Farm

The project consisted of two phases of the world’s largest offshore wind farm, each with an installed capacity of up to 1.2 gigawatts.

Covering 515km², Dogger Bank A is approximately 131km from shore at its closest point, as is Dogger Bank B, which covers 599km².

Jones Bros was engaged to commence with preliminary design work for a fully ducted system for the installation of both high voltage DC (HVDC) and AC (HVAC) cables. This was in conjunction with further design activity.

Works included:

• 12 access points / junctions off the highway network allowing access to the site
• Three main site compounds and five satellite compounds
• 32km of on-site temporary trackway to all access along the full length of the works corridor
• New post and pre-construction land drainage
• 46 crossing points over existing open ditch land drains and water courses
• Horizontal direction drills at 34 crossing points
• Joint bay design for both HVDC & HVAC circuits including link boxes and the landfall transition joint bay
• Convertor station working platform
• Early engagement with third party service assist operators including Network Rail, internal IDB, landowners, and agents

In addition to the offshore works, there were a number of other major activities undertaken to connect the renewable energy to the National Grid including:

• Installation of 120km of HVDC cable from landfall near Ulrome across a 30km route though agricultural land
• Construction of two DC to AC convertor stations
• Installation of 24km of HVAC cable from the convertor station across a 2km route before terminating into the National Grid substation at Creyke Beck substation near Cottingham