This project contained both 150mm (6”) and 200mm (8”) pipe on a dead end street which was experiencing water quality issues. The watermain required a water blow off to reduce red water and to maintain chlorine levels.
Pictures: Above left, Avenue Dollard during cleaning and lining operations, above right, lining equipment set-up in access pit by Gilbert Group crew.
Location: Avenue Dollard and Rue St. Albert, Alma, Quebec
Tomahawk Licensee: Logistique Saint-Laurent Inc., Gilbert Group, Chicoutimi, QC
Pipe Size, Material: 150mm (6") and 200mm (8”), cast iron
Total Length: 330m
Pipe Age: More than 60 years
Cleaning Technology: Tomahawk™ System
Lining Technology: Tomahawk airborne lining, BluKote™
Results: This dead end watermain was experiencing red water and chlorine residual problems due to pipe deposits and low flow rates. The red water cleared up and chlorine residuals improved significantly following return to service. Along with improved water quality was improved flow rates and extended pipe life by decades.
Pictures: Above left, watermain before cleaning, center, after cleaning with Tomahawk, right, after lining with Tomahawk BluKote™.