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Donegan Civil Engineering

Live Sewer Diversion for the Mersey Gateway – Waterloo Road, Widnes

Diversion of a 1050mm diameter sewer under live flow conditions to facilitate the Mersey Gateway Bridge

By: Valentine Donegan

Published: August 6, 2026

Live Sewer Diversion for the Mersey Gateway - Waterloo Road, Widnes

Client: Amey / United Utilities

Value: Approx. £1,100,000

Project Description / Main Operations

This project was carried out on behalf of Amey, for United Utilities. The works comprised the diversion of a 1050mm diameter sewer whilst maintaining flows, required to facilitate the construction of the new Mersey Gateway Bridge.

Scope and method:

Diversion of a 1050mm diameter sewer whilst maintaining flows.
Construction of 4 no. segmental shafts, 6.00m and 7.00m diameter.
Completion works to the above, including reinforced concrete bases, benching, backdrops and precast concrete roof slabs.
Construction of a 1500mm diameter tunnel approx. 140m in length, by pipejacking techniques using a backacter tunnelling machine.

For More Information, contact us at http://www.donegan.co.uk

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