Seagreen reaches new milestone onshore

Contractors on the Seagreen offshore wind farm have reached a project milestone with the completion of Horizontal Directional Drilling (HDD) works. It paves the way for the installation of the electrical cables required to transmit the electricity generated from the wind farm.

HDD is a technique that is used for the installation of ducting and avoids the need for open trenching/excavation. This has been used to insert ducting at eight locations along the onshore cabling route between landfall at the coast of Carnoustie and the project’s new substation currently under construction at Tealing airfield.

Locations where HDD has been used include a number of A Roads, including the major A90 and A92 trunk roads, water course crossings, a Site of Specific Scientific Interest (Barry Links SSSI) and even the main East Coast rail line which connects Aberdeen to London.

Works are currently underway in Angus to pull electrical cabling through 19.5 kilometers of underground ducts which will connect the £3 billion project to the Scottish national grid. The cable installation work is scheduled to be completed by Spring 2022.

Onshore Project Manager for Seagreen Steven Reid said: “We’re very pleased with the delivery of the HDD works by the project team and our Contractors, where the works have been completed safely and with a minimum amount of disturbance.

“The non-intrusive nature of Horizontal Directional Drilling means that it has a minimal environmental impact. It reduces noise, vibration, waste and earthworks in comparison to the traditional method of open trenching, where plant machinery is used for the bulk removal and reinstatement of earthworks. In addition, the installation process has enabled key local and national transportation routes to remain open throughout and resulted in no disruption to route users whilst the works took place below ground.

“We would like to place our thanks to the people of Angus for their continued patience whilst these works were undertaken and also to the various Stakeholders that supported during the design and construction phases. The project team will now continue to work with our Principal Contractor Nexans to safely deliver the final construction works required for the installation of the electrical infrastructure.”

Seagreen offshore wind farm is located 27 km off the Angus Coast in the Firth of Forth. Once constructed, the wind farm will be the largest in Scotland. It will feature 114 MHI Vestas V164-10 MW turbines and is expected to provide low carbon energy for more than one million homes. In September 2019, Seagreen secured a 15-year CfD contract awarded by the UK government. SSE Renewables is leading on the development and construction of the first 1,140 MW phase, supported by Total, and will operate the asset on completion, which is expected in 2022/23.

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