Complex and dynamic infrastructure and engineering for a deep drainage solution

Project Overview

Bovis Riverside LLP approached us regarding a deep drainage solution and subsequent highways upgrade required by the council to facilitate a large development in Stanton Cross. The project, formerly known as Midland Road Drainage, is a relatively small S278 contract on a site requiring additional drainage to a low point just outside Wellingborough train station. The original quote from another contractor of £2 million, along with 6 month programmes was not practical for the developers.

The original design implemented a single pipe at a depth of 6m with additional manholes to create sufficient attenuation at the lowest point to prevent potential flooding of the area. The length and width of the trench would have required the complete closure of the road, preventing access to the rail station and adjacent carparks, with a huge impact on goods in and out on the Royal Mail depot situated next to the rail station. In addition, this design would have required complex diversions of the existing services below the road.

We worked with Peter Brett Associates to alter the design and proposed the implementation of twin 900mm pipes laid at a lesser depth, effectively shortening and narrowing the trench required. The new design allowed for the road to remain partially operational under traffic management and required critical elements of the project to be completed over night (between 1am and 4am). This involved a large amount of temporary works and coordination to ensure access.