James Fisher Subsea has completed the removal of unexploded ordnance at the 111MW Nordergründe wind farm in the German North Sea.

The British company identified and detonated 72 UXOs out of a total of 224 targets.

The unexploded ordnance, released during the First World War, had delayed planned construction works and was at risk of costing the developer millions of euro as a result, James Fisher said.

Two vessels were deployed for the duration on the project, with specialist divers used to locate and remove the UXOs during the day and ROVs dispatched to detect and excavate through the night.

Developer WPD plans to install 18 Senvion 6.2MW turbines about 16km off the German coast.

“Due to the project’s potentially dangerous complexities - such as rough tide, heavily buried ordnance and inclement weather- the team was prepped to be ready at a moment’s notice whenever a suitable weather window opened up,” James Fisher Subsea project manager Max Clements said.

Image: Chris Akehurst