In recent years, the City of Charlottetown, PEI has experienced an increase in watermain breaks, particularly in the Parkdale area. The majority of existing watermains in this area are of Ductile Iron material, some of which date back to the mid-1950’s. Due to their mature age, these watermains are at increased risk of cracks and breaks.
The province of PEI most commonly replaces aging watermains with new PVC pipe; however, some watermains identified for renewal are in a dense area of the city, where there is significant underground congestion with utilities and other infrastructure. As such, the city decided to use Cured-In-Place-Pipe (CIPP) watermain lining due to its less invasive methodology and reduced costs.
At completion, this project rehabilitated a total of 1,000 metres of 150mm diameter watermain and 2,700 metres of 200mm diameter watermain. In addition, all valves, fittings and fire hydrants were replaced and/or upgraded, resulting in a completely renovated distribution system.
The successful completion of this project is a significant milestone for the City of Charlottetown, province of PEI and WSP, as it is the first-ever watermain lining project completed in the province. Through the collaboration of WSP’s PEI and Thornhill offices, this project demonstrated WSP’s capabilities to offer pipeline rehabilitation consulting services at a local and national scale.