United Utilities to start £54m Oswestry treatment works upgrade


United Utilities will shortly start work on a £54 million upgrade of its Oswestry water treatment works.

aerial photo Oswestry2The heartbeat of Liverpool’s water supply is being completely re-designed at the works in Shropshire - the original works became operational in 1892 and has been supplying most of Liverpool and parts of Cheshire ever since.

Danny Brennan, United Utilities project manager, said:

“This is a flagship scheme for us, modernising one of our most important treatment works in the North West, which supplies almost a million customers in Liverpool and Cheshire.

“It’s also a really special project. We’re re-designing a plant built by the engineers of yesteryear for our customers of the future. The works will continue to treat and clean water well into the next century.”

Engineers plan to use innovative methods to treat the water before it flows north by gravity towards Merseyside. The water supply starts its journey 18 miles away at Lake Vyrnwy, where it then flows to a holding reservoir called Llanforda, before it is treated at Oswestry and travels by gravity a further 50 miles to Prescot reservoir in Liverpool.

The latest technology will allow engineers to retire the existing 23 slow sand filter beds, which will result in 210 million of litres of water a day being treated for customers. The plant will be using brand new techniques to prepare supplies. Two hydro-turbines will also produce enough energy to power the site, with the daily surplus being sent into the National Grid.

C2V+ to build new Oswestry water treatment facility

C2V+, a VolkerStevin and CH2M HILL joint venture, has been awarded the has been awarded the £43m design and build contract to build the new plant as part of the AMP6 Construction Delivery Partner framework for United Utilities.

C2V+ will be delivering the first WTW facility in the UK to use a chlorine dioxide based chemical process. The innovative solution has been successfully used in North America and Europe and is an energy neutral process which will provide significant savings to United Utilities through the installation of hydroelectric turbines that feed surplus energy back into the grid.

The main elements of the project consist of a new flocculation/sedimentation basin, chlorine contact tank and clearwater storage tank. The existing rapid gravity filters are being refurbished to cater for an additional 40 million litres of water flow per day when completed.

Darren Hynes, framework director for C2V+ commented:

'After being named as one of four Construction Delivery Partners for the AMP6 framework in 2014, we are delighted to be appointed for this scheme at this early stage of the framework. It demonstrates the collaborative approach between C2V+ and United Utilities whilst providing sustainable employment opportunities for the local economy by creating over 50 jobs over the next two years.'

In 2014, United Utilities appointed C2V+ as one of four Construction Delivery Partners for AMP6 - the contract could be further extended to 2026.

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