Boskalis has carried out dredging and diving operations in collaboration with Allseas to prepare a depleted North Sea gas field for conversion into an offshore CO₂ storage site under the Porthos project.

In recent months, Boskalis deployed the trailing suction hopper dredger Gateway and the backhoe dredger Manu-Pekka to prepare the seabed for the installation of a 22-kilometer offshore pipeline by Allseas. As part of the project, the company dredged a trench across the busy Maasgeul shipping channel.

Boskalis’ Inshore & Nearshore Diving Services team conducted air diving operations at a depth of 17 meters in the fast-flowing Maasmond fairway. The divers performed several underwater tasks related to preparations for the subsea pipeline pull-in.

The diving team also worked offshore on the same project, carrying out tasks on the foundation of the P18-A platform. From a custom-built diving platform aboard Allseas’ pipe-laying vessel Lorelay, divers installed clamps for a 16-inch riser and connected two long spool pieces.

Boskalis expressed appreciation for the dedication and safe performance of its diving teams, as well as the collaboration with project partners throughout the operation.