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A closeup of a settlement tank at a water treatment works.

Welsh Water framework

Improving and enhancing wastewater and water assets to meet Welsh Water’s customer and regulatory commitments


Customer: Dwr Cymru Welsh Water

Location: Wales and Herefordshire

Value: £200m anticipated over five years

Completion: 2025

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sewer flooding protection projects

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properties protected

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Constructing Excellence values awards

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NCE Techfest 2019 - Innovation in Water award

We've been working with Welsh Water as a trusted partner for more than 25 years, helping to deliver their Asset Management Plans (AMPs), enhancing and maintaining the network and supporting their work towards the Welsh Water 2050 vision: to become a world class, resilient and sustainable water service.

As a Capital Alliance Delivery Partner, we're responsible for delivering a five year programme of work across the sewerage network and wastewater treatment works. Following our successful delivery as part of Welsh Water’s AMP6, our framework was extended for a further five years through to the end of AMP7 (2025).

Improvements delivered as part of these programmes range from the removal of individual properties from risk of sewer flooding, investigation and prevention of environmental pollution to the installation of innovative treatment technologies new to the UK. We have also delivered numerous enhancements driving innovation and leading in sustainable, low carbon solutions.

Project fact:

We've been instrumental in introducing WWetco Flexfilter, a new side-stream wastewater treatment process, to the UK. An established solids removal method from the USA, it increases treatment during high flow (storm) conditions and reduces untreated stormwater discharge.

Wentwood Reservoir, Caldicot, South Wales

“Welsh Water is delighted to look forward to continuing to work with Morgan Sindall Infrastructure in AMP7. The team has continuously demonstrated its agility and flexibility to deliver protection, enhancement and bring value for our customers and the environment; from single property flooding schemes, pollution prevention and environmental improvement projects and Wastewater Treatment upgrades through to making our raw water reservoirs and associated assets resilient for another 100 years.”

Martin Hennessey, Director of Capital Delivery, Dŵr Cymru Welsh Water

Making a difference

Working with our design partner Arup we have designed and constructed innovative surface water separation schemes across Wales, which have reduced internal property flooding and pollution incidents, providing resilience for changing climate conditions.

Our involvement in Welsh Water’s RainScape programme of works resulted in the protection of more than 100 residential properties and businesses during Storm Callum (in October 2018) previously at risk of flooding in Llanelli, South Wales.

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