Articles & Case Studies

Newcastle City Council selects Polypipe for flood alleviation project

Posted: Tuesday 18th September 2012

Polypipe, the UK’s leading manufacturer of plastic sustainable drainage and water management products, has supplied its Permavoid products to Newcastle City Council for a Defra-funded flood alleviation scheme at Acomb Crescent, Fawdon.

The housing development had previously flooded during heavy rainfall due to interaction between surface water sewers and the water level in the nearby Ouseburn River. In a bid to help prevent future flooding, Polypipe’s Charcon Permavoid system was installed under a recreational area between a road and the river.

The water management solution comprised of a Charcon Permavoid shallow modular cell system, which featured the use of Permavoid Biomat. Permavoid Biomat was incorporated into the design in order to trap and retain any residual and emulsified oils that may be present in surface water run-off before discharging directly into the river. The Permavoid Biomat forms an important component of the Permavoid system when considering the impact of the Water Framework Directive which states that all watercourses must achieve at least ‘good’ status by 2015.

As the surface water enters the Charcon Permavoid attenuation system through kerb drainage, the Permavoid cells had to be installed below the level of the road at the same time as being above the normal river level. As the system is designed for shallow applications, the burial depths could be tightly controlled to ensure the optimum attenuation performance was achieved. The units provide storage until river levels fall and gravity discharge can begin again. River water is prevented from entering the system by a non-return valve on the outlet.

John Robinson from Newcastle City Council commented: “After attending the Polypipe ‘SUDS Explained’ seminar and seeing first hand their expertise in water management, we decided that they would make the ideal solution provider for this project.

“Acomb Crescent is an area which is particularly prone to flooding, and the available space for a solution posed a problem for us. Polypipe’s Permavoid system was ideal for this project and Polypipe’s technical team were on hand to design the solution for us”.

Emma Thompson, Marketing Communications Manager for Polypipe commented: “Using our Permavoid products on this project not only enabled us to provide an effective drainage solution, but also to ensure that the water is returned to the watercourse in a clean, unpolluted form.”

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