CP329 Specification and Maintenance of Geocellular Underground SUDs Storage Systems

Large geocellular soakaway being installed in chalk area

There are many techniques available to store or dissipate storm water which can include, for example, balancing ponds, infiltration ditches and underground tanks.

WRc are running a collaborative Portfolio project that focuses on cells and arched chambers formed from plastic which are assembled to create an underground structure that can be used for either storm water storage or soak-away. It is expected that Sewerage Undertakers will be required to adopt geocellular SUDs storage systems that are located in public open spaces. Sewerage Undertakers will, therefore, need to provide design specifications for adoptable assets and ensure that their long-term operation and maintenance will be cost-effective.

WRc have been working with some 20 manufacturers and end users to identify the key requirements of these geocellular underground SUDs storage systems. Best practice guidance and a Water Industry Specification (WIS) for design, installation, operation and maintenance has now been written.