As Montreal continues repairs from the massive August water main break that flooded dozens of homes and businesses east of downtown Montreal, city officials are proactively rehabilitating another major water main that was built in 1910.
City officials say they hope to extend the pipe’s life by some 50 years with the addition of a flexible resin-coated membrane liner to a one-kilometre stretch of the 500mm pipe under Boulevard Rosemont between Boulevard Saint-Michel and Boulevard Pie-IX.
“The liner is introduced into the pipe through a nearby access point. It then undergoes a solidification process in which the liner is fused to the pipe,” Montreal public works officials announced in a statement. “This method, which requires little excavation, minimizes obstructions, the time needed to repair the pipes, and the need to use expensive and pollution-generating machinery.”
The pipe rehabilitation is expected to run until April 2025.
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Water Main Break Update
As for the August 16 water main break that occurred on René-Lévesque Blvd., east of de Lorimier Ave., Montreal officials said at a technical briefing that they had estimated another 15 years of use for the C301 pre-stressed concrete pressure pipe. That pipe, which had been scheduled for inspection in the coming weeks, was also set to undergo continuous acoustic monitoring, water department officials explained.
The 40-year-old, two-metre-wide damaged pipe has a 100-year lifespan and was installed in 1985.
