Project Show Case

Breakthrough on North Bristol relief sewer

As part of the North Bristol relief sewer project, last week TBM Fionnuala excavated a shaft with 6m diameter, 30m deep and 2 km length at MH09.This location is where the Fionnuala is going to have a short break and then she will start her journey to complete the North Bristol Relief Sewer Tunnel for Wessex Water.

The design and build contract for construction of a tunnel with 6.5 km length and 3 m diameter and implementation of the pipework that will decrease flood risk and increase storm water storage capacity to accommodate ongoing and future developments in Bristol and South Gloucestershire, was awarded to J Murphy and Sons by Wessex Water in April 2018. The new pipeline will connect Bristol’s existing trunk sewer in Lawrence Weston to the Frome Valley relief sewer near Cribbs Causeway and will direct waste more efficiently around North Bristol to their water recycling center in Avonmouth.

Due to the construction of most of the sewers using tunnelling method with TBM, the needs for excavating trenches is decreasing. The determined location for excavation of the North Bristol Tunnelling team is underneath the M5 motorway and Network Rail’s Henbury Loop freight railway and the construction process has been commenced in summer 2019.

You can accesses more information about this project by watching this video and visiting this website.

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