Trenchless Technology

JAN 2019

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38 T R E N C H L E S S T EC H N O LO GY JA N UA RY 2019 A F T E R T H R E E Y E A RS of development and testing , the first five installations using the Tomahawk BluKote Airborne Lining System are in the ground in Ontario and Quebec. The projects were completed from June to October by Logistique Saint-Laurent, an Enterprise of the Gilbert Group. The first project , completed in June, involved the relining of 460 m of 150 mm cast and ductile iron watermain, with some PVC repair sleeves, in North Bay, Ontario. The dead-end line ser- viced a small residential area and three large commercial properties along Gra- ham Drive. Developed by Envirologics Engi- neering Inc., in Bracebridge, Ontario, the Tomahawk System initially hit the market as a cleaning system that uses rocks as the abrasive and air flow to pull the rocks and debris through the line cleaning and drying it with little to no water. Envirologics added a dis- infection system and now the airborne lining . Logistique Saint-Laurent is the first licensee of the Tomahawk BluKote Airborne Lining System. To help facilitate bringing the prod- uct from the lab to the general public Logistique Saint-Laurent received as- sistance through the Federal Govern- ment 's Build in Canada Innovation Program (BCIP). According to Stepha- ne Joseph, project lead with Logistique Saint-Laurent , the company received approximately $500,000 to spread across the five projects. " BCIP allows us to show the technol - ogy and results in live situations, so future clients can see actual results," Joseph says. "Customers want to see these innovations in real -life situa- tions outside of the lab." Bleeding the Line Like many of the other watermains in the North Bay system, the Graham Drive line was tuberculated leading to capacity and water quality issues, as well as leaks and breaks due to cor- rosion and aging . Because the line is a dead-end it suffered from sub -par chlorine concentrations making water quality a major issue for the users. To help combat this the City in- stalled a bleeder line at the end of the pipe, which on its initial installation was only meant to run on a timer. In reality, because the water quality was so poor, the bleeder ran approximately 23 hours a day, seven days a week. " We were in the process of trying to work out an easement with one of the companies at the end of the line and we were going to loop through to an adjoining system in a residential area. Then we were presented with this op - tion from Logistique Saint-Laurent ," says Domenic Schiavone, director of Public Works for North Bay. " When we looked at the cost of the loop, it in- volved a lot of rock removal . We opted to try the trenchless technology." Schiavone estimates that the loop S T O P P I N G T H E B L E E D City Decides to Renew Instead of Loop a Dead End Main By Mike Kezdi These images — from top to bottom — show the watermain after Tomahawk cleaning and again following the application of the Tomahawk BluKote.

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