About this project
The City of London is planning to reconstruct the sanitary sewer siphon at the forks of the Thames River in London, Ontario. The Thames River sanitary siphon has been identified as a high priority for replacement due to the poor condition of the municipal infrastructure. The sewer was constructed in 1934 and has reached the end of its useful life. The project will include replacement of the existing siphon with a new parallel siphon and connection to the upstream and downstream sanitary sewer systems.
The replacement of the sanitary siphon also provides the City with a key opportunity to increase the capacity of the sanitary sewer system by removing a significant restriction point. The increased capacity will accommodate upstream development and intensification, supporting the creation of housing units.
Work is planned at Mitchell A Baran Park and Ivey Park, and will include below ground infrastructure to support the construction and operation of the siphon and connection to the existing upstream and downstream low level sanitary sewer system. A new connection will also be made to the high level sanitary sewer system located on King Street. The sanitary siphon itself will be tunneled under the Thames River and will be the largest tunneling project completed to date in London.
Due to current construction in Ivey Park and Mitchell A. Baran Park, some commemorative trees have been removed in these areas. We are aware the commemorative plaques have remained for the time being. Please note we will be replacing the trees and re-installing the plaques once construction is completed. For more information, click here.
Public update meeting
The City of London hosted a public update meeting at Kiwanis Seniors Community Centre on February 11th, 2025, to provide an update on the project and share information on construction.
Information that was shared at this meeting is available to review online and is posted to this webpage. Additional project information about tree removals, tree replacements, parking, and maps is also available to view on this webpage.
The map above identifies the approximate limits of the construction project area.
