Dun Laoghaire Harbour Dredging, Dublin

  • Client: Dun Laoghaire Harbour Company
  • Value(€ million): 1
  • Value($ million): 1.3
  • Completion date: 2003
  • PUNCH services: Project Management, Statutory Approvals, Contract Administration, Marine Engineering, Civil Engineering, Health & Safety

The first step to improving the harbour included carrying out environmental studies in support of applications for dredging and dumping permits with the council.  The scope of the overall project comprised dredging of 175,000 tonnes of sediment using a suction dredger and plough tug, increasing the draft to 6.1m below low tide. The overall duration of the execution stage of the project was 3 months.  Project management, procurement and site monitoring were all crucial to ensuring that this thriving harbour could continue to function throughout the works.

Dun Laoghaire Harbour is located in the south of Dublin and is the one of the main ports in Ireland.  The introduction of a high speed catamaran ferry service to Dun Laoghaire over the last decade led to significant erosion of material in the centre of the main fairway and deposition along the sides.   This created a situation where manoeuvring of the ferry was restricted and limited traffic in and out of the harbour.   The other harbour users, including a 500 berth marina, four yacht clubs, two sailing clubs and the Irish Lights Headquarters were also affected by these changes.  Dun Laoghaire Harbour Company engaged PUNCH Consulting Engineers to design and implement a programme of maintenance and capital dredging to improve the harbour facilities.

With a dredging operation active 24 hours a day, 7 days a week within a busy commercial and leisure harbour, liaison and coordination with all harbour users was a key element in ensuring that the works were executed without any safety incidents.  PUNCH achieved this objective through careful project management and open communications with all of those affected.

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