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New Ross Main Drainage Scheme

T J O’Connor & Associates were engaged by Wexford County Council in connection with a project to provide for the interception of raw sewage from 14 existing outfalls to the River Barrow and to convey this sewage onward to a new Wastewater Water treatment works in New Ross. A new 600m long interceptor sewer was designed and constructed across the full length of the Quays at New Ross. This included a 300m long tunnelled section of  1,200mm diamter inteceptor sewer. Pipe sizes range between 1,200mm and 450mm diameter. The works were undertaken as part of two separate construction contracts comprising (mainly) a gravity pipelines contract covering most of the interceptor sewer and a contract to construct the wastetwater treatment plant The interceptor sewer contract included certain works to assist in the improvement of flood protection measures by providing for the collection and overflow of surface water from the lower parts of the town to the (pumped) interceptor in times of high tides. The works had to overcome difficult ground conditions associated with deep alluvial deposits.

For the pipeline and pumping station works, sheet piled trench support systems had to be used to provide safe working conditions. These supports extended through exisiting made ground on the quays into native to cut-off tidal ingress to the trenches/tunnel shafts and pumping station wet wells.

Start/End Date:

Aug 2007 –  Dec 2009

Contract Value:

€ 16M


Full Engineering Services as Client’s Representative

Key Features:


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