Navigator Terminal

Supply & installation of new fender dolphin

River Thames, West Thurrock, Essex
3.5 months


  • Marine Engineering
  • Project Management
  • Marine Plant

Project Phases

  • 4 weeks – materials procurement
  • 8 weeks – off-site fabrication and painting
  • 14 days implementation – 7 of which were operating 24 hours


Acting as main contractor, DiveCo were contracted to manage all phases of this project, to supply and install a new fender dolphin to the jetty at our client’s fuel storage facility.

The main dolphin structure weighed 42T and was fabricated and painted off-site, before being transported to site by barge from our specialist fabricators based in Kent, then unloaded on to a 50m flat-top crane barge using a 160T crawler crane.

The main prefabricated dolphin frame consisted of four 1.5m diameter sleeves, each 6m long, with a series of 0.6m and 0.5m diameter tubular bracings. The dolphin frame was supported by four 1.4m diameter tubular piles which were 60m in length.

Each pile was installed in two sections using a 400T jack-up and 300T crawler crane, welded together with a full penetration butt weld, and then driven to final design toe level using a CG300 hydraulic piling hammer.

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