Lower Cork Harbour Main Drainage Scheme

GDG was appointed by Sorensen Civil Engineering to act as Temporary Works Designer for the Lower Cork Harbour Main Drainage Scheme.

The construction works were completed to improve the existing wastewater collection network at various locations within the town and environs of Cobh, Co. Cork. The works consisted of the construction of new foul/combined and storm sewer pipelines, including five new pumping stations. The works intercepted foul/combined flows entering Cork Harbour and diverted these flows to the Shanbally wastewater treatment plant via the Dockyard pumping station.

An image of a digger drilling into the ground

The Scope of Work

  • Develop the Ground Models for each of the pumping station and pipeline locations
  • Determine the requirements for trench excavation support
  • Zone of influence for the proposed temporary works Complete numerical analysis to predict movements, bending moments and shear forces in the trench sheets
  • Complete cofferdam designs for pumping station locations
  • Reporting, pile schedules and drawings
  • Geotechnical risk register

GDG completed the temporary works design for the trench excavations for the pipelines and for the cofferdams to construct the pumping stations. GDG also determined the zones of influence for review by Irish Water who were the ultimate Client. GDG coordinated their design with the permanent works designer and PSDP, JB Barry.


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