Cork Main Drainage, Ireland | Water

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In focus

Siphon pipes being floated into Cork Harbour, IrelandThe Cork Main Drainage Scheme is one of the largest engineering and environmental projects ever undertaken by a Local Authority in Ireland, representing an investment of in excess of €300million in wastewater collection and treatment infrastructure for Cork City.

Main elements of the scheme included a 2.6km tunnelled interceptor sewer, a pumping station delivering 2.45m³/s, a 3.5km inverted twin siphon across Lough Mahon Estuary and a wastewater treatment plant serving a population equivalent of 460,000 and treated effluent outfall to Cork Harbour.

Mott MacDonald Pettit was appointed as Consulting Engineers for the whole of the project which was procured under 25 separate contracts ranging in value from €0.7million to €90million.

The scope of work included preparation of the Preliminary Report and the Environmental Impact Assessment, steering the scheme through planning and on to detailed design, tender assessment and contract supervision for the foul sewer and storm sewer networks, pumping stations, mechanical and electrical installations and wastewater treatment facilities.