Sewer Connections & Creek Improvements in the East Don River

Map	Description
	Sewer Replacement
	Forcemains and Sewer Connections
	Weir Removal
	Channel Improvements
	Underground Tank & Pumping Station Building

Note: This  map will be updated when the relocation of the public washroom is confirmed.

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Purpose of this Project

The connection sewer between Sheppard Avenue and the Trunk sewer on Leslie Street needs to be replaced and increased in size to service the growing neighbourhoods.

The location and scope of the sewer replacement was combined with a similar project to construct an underground storage tank to improve the capacity in the sewer network. The removal of the concrete weir was also required and integrated into the plans. The benefit of combining these projects into a single construction program avoids future construction impacts to the park and river.

Key Construction Components

Sewer Replacement

The new sewer will replace the existing undersized sewer connection located closer to the Leslie Street and Sheppard Avenue intersection. This sewer replacement will extend from Sheppard Avenue through the East Don Parkland parking lot, across the East Don River to the location of the Trunk Sewer near the park trail next to Leslie Street.

Concrete Weir Removal

The river has moved around the existing concrete weir located just east of the parking lot. The weir no longer serves its purpose to help control flows and and the river has created an erosion scar along the east banks of the river. This erosion scar needs to be addressed and repaired to protect City infrastructure.

Channel Improvements

A 250 metre segment (approximate) of the river from the north-west corner of Leslie Street and Sheppard Avenue East has been impacted by erosion due to high/fluctuating flows and severe storms. Improvements to this segment of the river will address erosion, reduce the risk of exposing the four new sewers and existing trunk sewer, and provide enhanced river stabilization. River stabilization will include additional trees and native plantings, vegetated boulder revetments along the river banks, and construction of alternating riffles, ribs, and shallow pools along the river bed following natural channelization design guidelines and principles.

Underground Storage Tank

The underground storage tank will be located below the park parking lot. To move the flows between the tank and the trunk sewer, a pumping station, two forcemain connections and a sewer connection will be built. The location of the pumping station will require the existing washroom to be demolished. It will be replaced on the south side of the parking lot near the end of the project.

Construction Schedule

Construction is anticipated to start in late 2021 and require four to five years to complete. It will be carried out in phases which will be provided in a construction notice to the community and will also include additional information and dates.

Please sign up to receive Construction Notices and updates by email eastdonriver@toronto.ca

Construction Method

An open-cut construction method will expose sections of the river bed to allow the sewer lines to be installed across the river. This is a common practice used internationally and locally.

The river will continue to flow and be diverted around the open-cut sections. Both upstream and downstream of the work site, pea gravel bags will direct the water flows around temporary cofferdams. These temporary cofferdams will be built with sheet piles inserted about four metres deep and extend two metres above the river bed. The temporary cofferdams and pea gravel bags will be removed after the sewer connections are installed.

Public Notification

 Pre-construction and construction notices will be sent to the community and include further details such as:

• construction impacts
• tree removals and replacement
• trail impacts
• site restoration and creek improvements
• plans for the new washroom

Please sign up to receive Construction Notices and updates by email eastdonriver@toronto.ca

Construction will be impacting local trails and trail accesses intermittently throughout the construction schedule. This webpage tab will be updated as construction changes. Thank you for your patience.

Updated: February 24, 2022.

Closed Access to Trails:

• Leslie Street / Sheppard Avenue
• Old Leslie Street
• Mid-Leslie (closed until construction completed)

Open Access to Trails:

• Villaways
• Clarinda Park
• Leslie Street (north near Marowyn Drive)