Sunnidale Road New Transmission Watermain with Local Sewer and Watermain Relocations

Letitia Street to Wellington Street

This project will install a new transmission watermain from Letitia St to Wellington St. The project also includes relocation of the existing storm sewer, sanitary sewer, and distribution watermain that will be impacted by the Ministry of Transportation’s Sunnidale Rd bridge replacement project. The new and relocated watermains will travel under Highway 400 through a new trenchless crossing north of Sunnidale Rd.

Project Details

This project was initiated in 2013 as a Class Environmental Assessment Study for a new transmission watermain to connect to existing infrastructure at Letitia St and Wellington St as recommended in the Water Storage & Distribution Master Plan. A subsequent Class Environmental Assessment Study was completed in 2019 for the sanitary sewer relocation. The storm and watermain relocations were then added to the overall project scope.

More specifically, the scope of this project includes a new transmission watermain within the roadway of Sunnidale Rd from Letitia St to Wellington St. The existing municipal storm sewer and sanitary sewer will be diverted west to Highway 400, connecting to existing sewers north of Sunnidale Rd. The existing distribution watermain will be diverted parallel to the sewers and will enter a new crossing under Highway 400. The diversion of the distribution watermain and the new transmission watermain will cross under Highway 400 through a shared trenchless casing installed north of Sunnidale Rd. The trenchless casing pipe will be installed under Highway 400 through entry points north of Sunnidale Rd within former municipal addresses 79 and 53 Sunnidale Rd.

Project Updates

February 2022

The City has posted the construction tender for Contractors to submit their bid.  The City plans to have a Contractor hired in April 2022, with construction starting in May 2022.  Please monitor this webpage for pedestrian and traffic impact updates once construction has commenced.

Project Features

• Installation of a new 600mm diameter transmission watermain along Sunnidale Rd from Letitia St to Wellington St.
• Relocation of the existing storm sewer, sanitary sewer, and distribution watermain to divert them around the Sunnidale Rd bridge crossing Highway 400, in advance of the ultimate Ministry of Transportation bridge replacement in summer 2023.
• Abandonment of the existing sanitary sewer and distribution watermain that currently exist within the bridge.
• New trenchless casing to carry watermains under Highway 400 north of Sunnidale Rd.

Schedule