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North Bristol Relief Sewer

Client: John Murphy & Sons

Construction of the new 6.5km pipeline began in summer 2019 and is planned to finish by spring 2022. It 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 our water recycling centre in Avonmouth.

Much of the sewer will be constructed by tunnelling underground using a tunnel boring machine, reducing the need to dig trenches. We will even tunnel underneath the M5 motorway and Network Rail’s Henbury Loop freight railway, but no one will feel our presence there.

The North Bristol relief sewer forms an essential part of our long-term sewerage strategy for the next 100 years.

Project in numbers

completion date
year, long-term sewerage strategy