Wessex Water is investing £55 million (US$67.8 million) to build a new relief sewer in North Bristol to ensure the sewerage network longevity.
The North Bristol relief sewer is a 6 km pipeline that will pass under the M5 motorway and connect to the recently built Frome Valley relief sewer.
As part of the project, a tunnelling compound will be set up, as well as the excavation of two 8 m deep launch pits, one in a nearby school’s playing field and one at the Lawrence Weston Moor nature reserve, which will take seven months to build.
The project will use tunnelling for the new 3 m in diameter sewer, progressing north for 5.5 km, with the remaining 1 km being built using open trenching.
The North Bristol relief sewer required to ensure that the sewerage network can cope with the ongoing and future development of the Bristol and South Gloucestershire region.
Once connected to the Frome Valley relief sewer, both of the new sewers will direct North Bristol sewerage to Wessex Water’s water recycling centre in Avonmouth.
The North Bristol relief sewer project will form a vital part of Wessex Water’s long-term sewerage strategy for the next 100 years.
The first phase of the project commenced on 19 August 2019, with tunnelling to follow in March 2020.
The project is expected to take two and a half years to complete.
For more information visit the Wessex Water website.
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