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Severn Trent begins Mythe flood resilience project

Construction has begun on a new £9.5M water supply pipe to prevent a repeat of the 2007 Mythe treatment works flooding disaster that left 350,000 people without clean water.

Water company Severn Trent is building the new pipeline to bypass the Mythe water treatment works in Tewkesbury, as part of a wider £25M package to ensure security of water supply in the area, should the Mythe works sustain another incident.

The new pipe will run for 17km from Strensham water treatment works to Coombe Hill in Gloucestershire, before connecting with the existing network supplying water from the Mythe works to Churchdown and Hewletts reservoirs.

Work on the pipeline will finish in December 2010 with final land reinstatement in 2011.

Flood resilience package

Contractor Morgan Est is building the pipeline using welded steel pipe, which is unusual in Severn Trent’s network. The 13.5m long pipes are shipped from Germany, with around 300 pipes delivered so far.

The pipes will be welded together in sections of three, which will then be lowered into a trench. The pipeline will mostly cross agricultural land, but will at points cross under the M5, A46, River Avon and a railway line near Bredon’s Norton.

The other phases of Severn Trent’s wider flood resilience package will include modifications to pipe work, valving and pumping at both Mythe and Strensham water treatment works, and the construction of additional pipelines and pumping stations to pass water from the Gloucester system through to the Forest of Dean in the event of a loss of supply from Mitcheldean water treatment works.

In the summer floods of 2007, severe floods engulfed the Mythe treatment works and left 350,000 people without potable water for 17 days. Local hospitals were among those affected.

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