SWELL PROJECT
SWELL - NEWPOINTWWPS
Newpoint WwPS.
9m deep inlet chamber.
New screens remove rags from the wastewater.
UPGRADE PROVIDES PROTECTION TO THE EXTENSIVE SHELLFISH HARVESTING IN CARLINGFORD LOUGH... NEWPOINTWASTEWATER PUMPING STATION
N ewpoint WwPS is the terminal pumping station for the City of Newry, meaning that all flow from Newry and surrounding area arrives at Newpoint WwPS before being passed on to Newry Wastewater Treatment Works (WwTW). Continued catchment growth and excessive flows arriving at the pumping station presented a significant pollution risk and a potential barrier to achieving EU Water Framework Directive ‘good’ water quality status for the Newry Estuary and Carlingford Lough. Newpoint WwPS was previously equipped with three wastewater pumps that transfered flow (approximately 500 litres per second) 1km to Newry WwTW, as well as four storm pumps that pump storm water flows to two storage tanks within the WwPS site. The provision of improved operational control and installation of coarse and fine screening equipment at the Newpoint WwPS site provides protection to the extensive shellfish harvesting areas within Carlingford Lough. MAIN CONTRACTOR GRAHAM had overall responsibility for the successful delivery of the Newpoint WwPS upgrade under the SWELL project, from Early Contractor Involvement through to project
handover. This included the installation of coarse screening equipment to protect the existing pumps on site from blockages and potential loss of wastewater to the adjacent Newry River. Fine screening was also installed on the storm tank overflow to provide further protection to the river during periods of prolonged heavy rainfall. Installation of new waste skips and associated infrastructure safely store the screenings for subsequent disposal off site. Works also included the installation of a new NIE substation within the confines of the existing site, to provide additional resilience against power outages to the plant in future. Commenting on the project, Mark Little, Contracts Manager for GRAHAM said, “The scheme involved a range of construction techniques and challenges, which had to be fully considered, eliminated, or managed appropriately as design and construction work progressed on site.” Such challenges included a restricted site area, extremely poor ground conditions and the need to deal with existing high wastewater flows. “Detailed methodology, programming and BIM modelling completed during the pre- construction phase ensured a thorough review of phasing was completed, so risks identified at the design stage were discussed and eliminated where possible. “Thorough site investigation was carried
out within the footprint of the site, to confirm the underlying conditions, to develop the permanent designs and subsequent temporary works requirements in the form of cofferdams and a well point dewatering system. “Due to the poor strata encountered during the site investigation, permanent piling was completed on all the permanent structures and interconnecting pipework within the site, to ensure the structures and pipework were suitably supported.” In conclusion, Mark said, “This project is a great example of positive stakeholder management from Early Contractor Involvement through to project completion. Successful delivery of this challenging scheme reinforces our commitment to NI Water, and we look forward to continuing our long relationship with them on future projects.”
PROJECTTEAM...
McAdam Design
Construction Consultancy Services
GRAHAM
ENISCA
AECOM
www.northernbuilder.co.uk
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