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Tunnelling work in the pipeline

image depicting Pipes ready to be laid from Roborough to Coombe Lane
Pipes ready to be laid from Roborough to Coombe Lane
Work has started to lay the pipes needed to transfer treated drinking water from South West Water's new £60million Mayflower Water Treatment Works into Plymouth's water distribution system.

The new pipeline will run from the new treatment works, currently under construction at Roborough, just north of Plymouth, to Coombe Lane, near Tamerton Foliot (see PDF, right).

Later in the project more pipes will need to be laid between Coombe Lane and Plymouth.

570 seven-metre pipes, each weighing 1.4 tonnes, will be laid approximately two metres deep along the four-kilometre route. Each pipe is 80cm in diameter.

The pipeline will cross under the A386 just north of the junction with New Road. A tunnelling machine will be used to burrow this 60-metre long section in July, enabling the main Plymouth to Tavistock road to remain open.

Most of the rest of the pipeline will be under fields, but two brief road closures are planned.

Soper's Hill in Roborough will be closed between its junction with Roborough Lane and its junction with Tamerton Road for approximately four days in mid-July. Pound Cross in Roborough will be closed between Tamerton Road and Common Lane for approximately four days at the end of July.

Clearly signed diversion routes will be in place and local residents will receive more information when the road closure dates are confirmed.

South West Water's new £60million state-of-the-art water treatment works will serve Plymouth and the surrounding area.  About 150 people will be employed in its construction.

More information is available at www.southwestwater.co.uk/mayflower

Notes to editors

  • Mayflower Water Treatment Works will replace the outdated treatment works at Crownhill in Plymouth, which was built in the 1950s and is reaching the end of its useful life
  • The new works will meet the needs of Plymouth's growing population and provide a secure, high-quality drinking water supply for the wider Plymouth area for generations to come
  • It will use cutting-edge treatment processes, designed and developed by leading Dutch water technology company PWN Technologies, and tested at a prototype facility at Crownhill from June 2013 until June 2015
  • The new technology uses suspended ion exchange with resin regeneration system, inline coagulation and ceramic membrane microfiltration. It is the first time that this combined technology has been used in the UK
  • The construction phase is scheduled to finish by end of March 2018. Mayflower will become operational in September 2018, with the existing Crownhill works retiring from service a few months later.

Published: 22 June 2016

For further information please contact:

Press Office
South West Water
www: www.southwestwater.co.uk/contactus

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