Contract Completion: Killybegs Outfall

Contract Completion: Killybegs Outfall

Norfolk Marine have completed the installation of the subsea elements for the Killybegs waste water outfall as a sub contract for Visser & Smit Hanab, working for main contractor BAM. Our 8 man dive team, working from the Skerchi construction barge, carried out the following operations in 30m of water.

    Location of directional drill bit on seabed and airlifting of drill string exit point
    Setting up of subsea pipe pull equipment and monitoring pull
    Underwater cutting of 450mm diameter HDPE pipe wall thickness 35mm
    Connection of pipe transition piece
    Construction of 150m long subsea pipeline and diffuser
    Installation of precast concrete articulated scour mattress
    Installation of stainless steel diffuser guards
    Backfilling of pipeline trench