Holmer West, Hereford

The Developer Services Team at Dwr Cymru Welsh Water (DCWW) required the design of an offline attenuation structure and flow control manhole to limit the forward flow rate into the existing public combined sewer at Holmer West, Hereford. This was needed to protect the existing asset from the additional flows that would result from a proposed housing development upstream. Burroughs carried out the hydraulic modelling, and a value engineering and buildability exercise to produce a design that was simple to construct, cost effective, and minimised the embodied carbon of the project.