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New sewer to be laid in Ilkley using trenchless technology




WORK is to start at Ilkley to lay a new sewer under the A65 to reduce the frequency and volume of storm water discharges into the River Wharfe during periods of heavy or prolonged rain.

Yorkshire Water partner Ward and Burke will begin work on November 17, setting up work areas at the site ahead of construction. Trenchless technology will be used with remotely controlled underground drilling rigs throughout the project to minimize disruption when laying 800m of new sewers under the A65 to the sewage treatment plant. waste.

This reduces the need to close the road as it lays pipes behind it and returns the earth to the staging site where it is cleaned and recycled for use in other projects in the area.

The sewer will function as supplemental storage during periods of heavy or prolonged rainfall to reduce the frequency of discharges from the Rivadale overflow by 40% and halve the volume of wastewater discharged during these events.

The first stage of work will include the laying of the sewer between Yorkshire Water’s Ilkley sewage treatment plants and Ashlands playgrounds. The second stage of the project consists of laying the sewer under the A65. Remote-controlled tunneling equipment will be used at depths of 5 to 8 meters below ground, to dig the hole for the new sewer.

Material will be collected from the Ilkley Wharfe View car park once the sewer has been laid.

Ben Roche, Director of Wastewater at Yorkshire Water, said: “This project forms a significant part of our investment in Ilkley following the creation of indoor bathing water at the town quay. Laying a new sewer to accommodate higher sewage flows during periods of heavy and prolonged rainfall will ultimately reduce the number and volume of Rivadale CSO discharges, helping to improve water quality in the platform.

“We have worked closely with Bradford Council’s motorways teams to keep disruption to our customers to a minimum. As a result, we are using trenchless technology, with equipment drilling the hole and laying the sewer remotely, avoiding the need to dig the A65 to complete this work. For the majority of the project, there will be limited signs of our underground activity.

“We fully understand the increased public interest in river quality in our region and this is an issue that needs to be addressed by a range of bodies working together. We continue to invest beyond existing investment plans in Ilkley and surrounding areas to make improvements to our network to reduce its impact on water quality. Water companies have a key role to play, but coordinated action is needed between farmers, local authorities, businesses and local people with the ultimate goal of improving bathing water classification.

To allow equipment to be checked and retrieved from underground, part of an Ashlands playground will be turned into a work complex and the Ilkley Wharfe View car park will be closed. Yorkshire Water is working with Bradford Council to develop alternative parking arrangements.

The project is expected to be completed in January 2024.