Chatham Water Treatment Plant, New Water Main from Chatham High Lift Pumping Station to Grand Avenue

completed

Closed

Due to aging, the existing transmission main between High Lift Pumping Station and Grande Avenue has had two failures in the past. During a failure, a temporary on-ground pipe is needed to provide an uninterrupted water supply to the Chatham distribution system until the repairs are complete. This work enables twinning the existing main and increases the reliability of uninterrupted water supply to the distribution system. The following value additions improve safety, reliability and minimize service interruptions: - upgraded the material of pipe (concrete instead of PVC) due to pressure concerns. - upgraded the valve chambers, air relief considerations, swab launch facilities to be compatible with the concrete pipe. Pressure issues could cause pipe failures and shut down of the facility. - addition of work to abandon the existing connections to the south chamber and outfall to the river from the old water plant. These items were still connected to the existing system and the abandonment will improve the overall reliability of the system. - addition of 450mm diameter PVC by-pass piping to further enhance the redundancy protection. - upsizing existing piping within the existing plant to enhance flows and match the new 450mm diameter by-pass piping including the addition of a flow meter. This change will improve the overall reliability of the system and will allow the Owner to maintain a constant supply of water to the public. - grouting the abandoned settled water line. The existing abandoned settled water line has leaks into the settled water manhole causing it to be constantly full. This is a health and safety issue and the chamber has to be emptied every time a worker needs to enter. Grouting the line will prevent water from entering the chamber and will improve health and safety and reduce maintenance costs.

Drinking Water and Wastewater

Canada

Infrastructure Canada

Project

Cement, Water Supply and Storage, Government