College of North-West London (CNWL) Wembley Park, London

Detailed Surface & Foul Water Drainage Strategy

Services offered

  •  Detailed Surface & Foul Water Drainage Strategy

The brief

Civilistix Consulting Engineers were appointed to prepare a Detailed Surface & Foul Water Drainage Strategy to support a planning submission for the creation of a proposed educational building for the College of North-West London (CNWL), located in Wembley Park.

What we did

We followed the surface water disposal hierarchy as per Part H of the Building Regulations, The London Plan and Local Authority design stipulations.

We specified and initiated an intrusive Ground Investigation which confirmed infiltration discharge to be unsuitable due to recorded London Clay of extremely low porosity. Due to this and no nearby watercourses within vicinity of the site, we proposed a controlled surface water discharge (of 5.0 l/s) for all storm events up to and including the 100 year plus 40% climate change event to a nearby Thames Water Sewer.

We delivered SuDS in the form of permeable paving to all external hardstanding areas, geo-cellular storage and green roofs. These measured ensured sufficient treatment and attenuation storage volume as well as created amenity and biodiversity value to the development.

We worked in close collaboration with other specialist design consultants ensuring optimal drainage solutions could be identified and adopted in light of the relatively land-locked nature of the development.