C2V+ passes key milestone at Chorley Wastewater Treatment Works

C2V+, a joint venture which comprises VolkerStevin and CH2M, are progressing well on the £14.5m upgrade contract at Chorley Wastewater Treatment Works (WwTW) for United Utilities.  

Chorl 1.jpg
Chorl 1.jpg

The project which began in October 2015 is designed to ensure compliance with the Bathing Water and Shellfish Directive by limiting storm spills into the nearby watercourse. 

A key milestone on the project was reached recently as 50 members of our workforce worked 18 consecutive hours to enable a continuous concrete pour. The task, which began in the early hours of the morning, lays the foundations for the new 43 metre diameter settlement tanks.

The main elements of the project are the construction of a new inlet works, final settlement tanks and the refurbishment and change of the existing surface aeration plant to a fine bubble diffuser plant.

With the construction of various pumping stations and buildings, the replacement of two of the three existing sludge storage tanks including all the mechanical and electrical equipment and infrastructure, will be used to enable new processes to operate in automation. These will then have the ability to communicate with the central control room at Blackburn WwTW.

Darren Hynes, framework director of C2V+, said: “This is a challenging project with a huge amount of work to be done to meet the regulatory date of April 17. Most of the large structures are precast off site to minimise the amount of construction on site, improve quality as well as minimising local traffic movements. The project requires a lot of expertise and precision to ensure no impact to the existing operational works whilst the reconstruction is carried out.  We have been working closely with the local community to make sure all residents are updated and notified of any changes to minimise inconvenience and disruptions around the site area.”

“We also worked with United Utilities to resurface the road leading up to the site to enable better flow of traffic and give something back to local residents.”

Commenting on the concrete pour, Michael Ryding, senior project manager for C2V+, said: “We had a one day window to complete the pour as quickly as possible to ensure that the concrete was achieving the desired set by using a mechanical finishing tool (powerfloat) to get the perfect finish. It is a real milestone for the project so we are really pleased it went to plan. This has enabled us to quickly move onto the next milestone which will involve the installation of the precast concrete units that form the walls of the tanks.”

Construction of phase one is expected to be complete by March 2017.