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Aecom appointed lead designer for Bristol relief sewer tunnel

north bristol relief sewer map

Aecom has secured a contract with J Murphy & Sons as lead designer for the North Bristol Relief Sewer.

The new 6.5km tunnel will form part of Wessex Water’s long-term sewerage strategy for the next 100 years to reduce flood risk and increase stormwater storage capacity in Bristol and South Gloucestershire.

To be built under the M5 motorway and Network Rail’s Henbury Loop freight railway, the new pipeline will link to the new Frome Valley relief sewer from Frampton Cotterell to Bradley Stoke.

Most of the tunnel will be built deep underground with some sections reaching 30m below ground level.

Aecom head of tunnelling for Europe Steve Woodrow said: “Tunnelling under the M5 and operational rail services, and connecting with the existing sewage system, this complex tunnel is a vital part of Wessex Water’s strategy to future-proof the sewerage network for communities in Bristol.

“Aecom brings its expertise on a number of major water infrastructure tunnelling schemes to the project, including Tideway and Deephams Sewage Treatment Works.”

The firm is working with J Murphy & Sons, who were appointed principal contractor for the £45M project earlier this year, on the scheme’s outline design.

Construction is expected to start towards the end of 2019 and will take approximately two and a half years to complete.

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