Denso Steelcoat protects Scottish Water aqueducts

Scottish Water plc has recently completed a £7million project to upgrade aqueducts conveying water from Loch Katrine to Glasgow. The company says it was the biggest improvement to the aqueducts since they were constructed more than 150 years ago. The main contractors were George Leslie Ltd, with Jacobs being the Consulting Engineers.

Winn & Coales (Denso) Ltd’s Steelcoat 400 system was chosen to give long-life protection on the 48in diameter pipes used at three structures which were virtually reconstructed along the aqueduct system. These carry two twin pipeline sections conveying 450 million litres of water per day to 1.3 million people.

The Winn & Coales Steelcoat system, applied by sub-contractor Interserve Industrial Services Ltd, in each case comprised of: Denso Hi-Tack Primer, Denso Profiling Mastic, Denso Hi-Tack Tape, Denso Ultraseal Tape and a Denso Acrylic Topcoat.

Jim Clark, Senior Project Manager at Interserve, said:

“Due to the remote locations and the change in weather patterns throughout the refurbishment of the pipes we had a number of challenges to overcome but we are highly delighted with the quality of the finished product. It was a pleasure being a part of the team whilst carrying out this project for George Leslie and Scottish Water.”

Over the combined length of the old and “new” aqueducts, there were more than 30 historic listed structures and planning permission for the repair work was conditional on full consultation with Historic Scotland.

Scottish Water’s project manager, Simon Renton, said:

“Strict adherence to constraints and restrictions was necessary to ensure that the character of the historic structure was preserved. Reconstructed areas of masonry on every part of the structure had to match the existing stonework in terms of appearance and painting and protective coatings systems were carefully chosen to blend with the surrounding structure.”