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  • Frome Valley relief sewer

    We are investing around £15 million in building a new sewer which will ensure our system copes with ongoing and future development in North Bristol and South Gloucestershire.

    The Frome Valley relief sewer will enable us to provide a additional capacity for new developments in areas such as Yate, Emersons Green, Bradley Stoke and Filton, where thousands of new homes are being built.

    Frome valley sewer map

    Frome valley sewer map key

    The first sections of the Frome Valley relief sewer were laid in areas of North Bristol and Yate in South Gloucestershire in the 1980s and 1990s.

    The next phase is to construct a 5km long, 1.8m diameter sewer pipe that will run from Iron Acton, north of Frampton Cotterell, and then westwards to Bradley Stoke. Most of the work will be carried out in fields rather than roads.

    Once built, the sewer will divert waste water flows from South Gloucestershire to Bristol sewage treatment works in Avonmouth via a route around the north of Bristol, rather than alongside the Frome Valley and through the centre of Bristol.

    Diverting the flows will provide additional capacity for the new developments and significantly reduce the risk of sewer flooding in the area.

    The Frome Valley relief sewer is one of many projects included in our £2 billion investment programme to maintain and improve services between 2015 and 2020.

    What does the work involve?

    In the first phase, there will be localised works within the Three Brooks local nature reserve in Bradley Stoke. This will consist of excavating a large shaft that will enable us to tunnel under the M4 motorway. A temporary footpath will be in place and access will be maintained at all times.

    Heavy construction plan and machinery will also have access to carry out the work which will start on Monday 24 April 2017 and last for six months.

    While we carry out the work we will take care to protect the natural habitats and environment of the local wildlife. Once our work is complete we will return the local nature reserve to the condition we found it.

    We apologise in advance for any inconvenience this work may cause.

    Frome Valley access map

     Schedule of work

    Preparation works, including setting up site compounds on private land

    Work starts Monday 10 April

    Compound set up in Three Brooks local nature reserve, Bradley Stoke  Work starts Monday 24 April 
     Fencing set up for whole scheme Work starts Monday 24 April 


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