Murray Street Water - Replacement of cast-iron watermain

completed

OBJECTIVE: The Town is actively adopting wastewater infrastructure renewal projects that improve operation and maintenance requirements, reduce inflow and infiltration, provide enhancements to the natural environment and support long term sustainable infrastructure. SCOPE: The scope of this project includes the replacement of 630 metres of 200-375mm diameter vitrified clay sanitary sewers from Aberdeen Street to Waterloo Street that were constructed in 1925. The sanitary sewer is in a poor structural state and is beyond the end of its service life, as such, replacement of the sanitary sewer is the recommended rehabilitation alternative along with the replacement of maintenance holes and sanitary laterals. Additionally, the project includes the replacement of 240 metres of 150mm diameter cast iron watermain constructed in 1920 from Aberdeen Street to Central Avenue. The watermain is beyond the end of its service life and is prone to failure leading to water quality concerns. Considering the age of the watermain, replacement of the watermain is the recommended rehabilitation alternative. This is a priority project for the Town. Town Council has accelerated this project to design in 2016 and construction in 2017 through administrative report IS-22-2016. This project was originally forecast for design in 2018 with construction forecast for 2019. This project has a planned 2017 construction start. OUTPUT: The estimated reduction in stormwater (inflow & infiltration) entering the wastewater distribution system is approximately 4,000 m3 per annum as a result of replacing the sanitary sewer, maintenance holes and service laterals. The replacement of the watermain will improve system reliability; reduce operational issues as well as reducing opportunities for negative impacts to water quality. The project will directly contribute to reduce point source sanitary overflows to meet both regulatory requirements and objectives of the remedial action plan for the Niagara River.