Trenchless technology means the city will not have to dig up roads to replace 2.7 kilometres of sewer pipeline in need of repair.
Instead, Cured-In-Place Pipe (CIPP) will be used to repair a section of line running along Hardy Street, Enterprise Way, Enterprise Court, Parkinson Way, Sutherland Avenue, Burtch Road, and through the Parkinson Recreation Centre parking lot.
鈥淭he problem started in 2018 at a key intersection in town,鈥� explained Rod MacLean, utilities planning manager. 鈥淰ideo inspection showed that the pipe had deteriorated underneath the intersection of Sutherland Avenue and Burtch Road.鈥�
The steel reinforced pipe is 40 years old but should last 80 years, MacLean said.
鈥淲hat鈥檚 important about that one is that all the flow comes from across the highway in two areas, so we were concerned about this.鈥�
The project was stalled by COVID and then design and constructibility issues. Replacing the pipe with traditional construction would be time-consuming and more costly.
鈥淲e really didn鈥檛 want to dig under the highway if we didn鈥檛 have to,鈥� MacLean added.
CIPP technology injects material into the pipe through a manhole with it traveling in both directions.
鈥淚t鈥檚 like a balloon that gets pushed through the pipe鈥t goes in heated鈥hich finishes the cure,鈥� MacLean said. 鈥淏asically what you get is a blue PVC pipe inside except it鈥檚 a slightly different material.鈥�
CIPP is expected to last 50 to 60 years.
To insert the liner, the sewer flow will be bypassed with two overland pipes monitored 24 hours a day.
One pipe will intercept at Hardy St., redirecting along the old rail bed and then following Clement Ave., and reconnecting to existing sewer lines on Vineland St. The other pipe will begin at Burtch Rd. between Highway 97 and Sutherland Ave. and rejoin the existing sewer line at Guisachan and Byrns roads.
The $7 million project begins next week and some intermittent single-lane alternating traffic is expected during construction.
鈥淭his is the first time using this (CIPP) and it鈥檚 a real chance for us to look at this as a new option,鈥� MacLean said. 鈥淲e鈥檒l see where it goes in the future with other utility possibilities.鈥�
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