James Fisher Renewables completes first phase of UXO works at Sofia

James Fisher Renewables (JF Renewables), part of James Fisher and Sons plc (James Fisher), has completed the first part of a two-phase contract to investigate unexploded ordnance (UXO) and potential archaeological features ahead of the installation of export cables for RWE’s Sofia offshore wind farm, located off the north-east coast of the UK.
During September and October 2021, JF Renewables investigated 35 near shore targets to assess the need for disposal. Observation and work-class remotely operated underwater vehicles were launched from a small vessel to facilitate a diver-less operation.

From May 2022 onwards, up to 125 deep water targets will be investigated using the same proven approach. Any confirmed UXO targets will be removed using an innovative ‘low order’ disposal technique to minimise the noise from the removal and therefore also reduce the risk of harm to marine mammals and sea life.
Wayne Mulhall, managing director at James Fisher Renewables, said: “We are delighted to be continuing our established and successful relationship with RWE on the Sofia Offshore Wind Farm. Following a thorough investigation of this particular route, we successfully confirmed all scoped targets as non-UXO.

“Our expertise gained from performing more than 3,000 UXO investigations around the globe enabled us to identify additional targets requiring survey, helping us to ensure phase one of the work was completed to the highest standard with the greatest regard for safety for all those involved. We look forward to completing phase two during 2022.”

RWE’s Matthew Swanwick, project director for Sofia Offshore Wind Farm said: “James Fisher Renewables has successfully completed the first of two campaigns to identify nearshore unexploded ordnances (UXO) and archaeological anomalies for Sofia Offshore Wind Farm. Their expertise made them the right company for this job and we were pleased with the efficient way they carried out phase one of the work off the Teesside coast.  The experienced team provided professional support throughout, ensuring that the project was delivered safely and on time.”

The 1.4 GW
Sofia offshore wind farm is located 195 kilometres from the UK coast on Dogger Bank, in the shallow area of the central North Sea. It will consist of 100 Siemens Gamesa SG 14-222 DD turbines. The 100% RWE-owned project represents a total investment of approximately £3 billion and is scheduled for completion by Q4 2026. RWE was awarded a Contract for Difference (CfD) for Sofia in 2019, achieving a strike price of £39.65 per megawatt hour (in 2012 prices).

JF Renewables was previously contracted by RWE in 2020 to work on UXO investigation for the Triton Knoll offshore wind farm off the coast of Lincolnshire, UK.

For more information on offshore wind farms worldwide, click here.