30-36 Rose Park Crescent Slope Stabilization Project

Toronto and Region Conservation Authority (TRCA), in partnership with the City of Toronto, is undertaking remedial flood and erosion control works to stabilize the valley slope and provide long-term protection for private properties located at 30, 32 & 36 Rose Park Crescent, in the City of Toronto.

Project Location

The Project area is located northeast of Yonge Street and St. Clair Avenue, in the City of Toronto. Residential properties on Rose Park Crescent back onto the crest of a steep valley slope near Yellow Creek, within the Vale of Avoca Ravine.

30-36 Rose Park Crescent Slope Stabilization Project Location. The red box outlines the Project area
 The red polygon marks the work area, which is generally located northeast of Yonge Street and St. Clair Avenue, in the City of Toronto. Works are confined to private lands.

Learn More About the Project

Project Background

Following the May 2017 rainfall and flooding event, Toronto and Region Conservation Authority (TRCA) was notified of a major slope failure behind three residential properties located at 30, 32 and 36 Rose Park Crescent, in the City of Toronto.

Considering the extensive damage and close proximity of the failure to residential properties, TRCA implemented interim protection measures in May 2017, which included the extension of all downspouts to the toe of slope and covering the entire exposed slope face with tarps.

TRCA subsequently retained the geotechnical engineering firm, Terraprobe Inc., in June 2017, to complete a geotechnical investigation to confirm the cause and extent of slope instability and risk to essential infrastructure.

The results of the investigation confirmed that one residential dwelling is at risk in the long term should no stabilization works be undertaken.

Changes in site conditions and observations of accelerated erosion and slumping observed in June 2018 prompted the recommendation to expedite the planning and design process in accordance with the emergency works provisions in Conservation Ontario’s Class Environmental Assessment for Remedial and Flood Control Projects (2013).

Due to the risks to public safety, TRCA issued an emergency works declaration in November 2018.

Upon completion of a competitive procurement process in 2019, Midome Construction Services Ltd. was awarded the contract to develop the designs and implement construction at the project site.

The failure scarp at 32 Rose Park Crescent
The failure scarp at 32 Rose Park Crescent, in the City of Toronto.
Tarps were installed by TRCA staff to prevent or reduce erosion along the slope face as an interim measure while a permanent solution was being developed.
Tarps were installed by TRCA staff to prevent or reduce erosion along the slope face as an interim measure while a permanent solution was being developed.

Scope of Work

The goal of this project is implement a slope stabilization solution that will ensure long term stability for the residential dwellings at the top of slope.

Work will include removal any failed material resulting from the slope failure, and construction of a rubble fill buttress. Drainage structures will be incorporated to manage groundwater and engineered fill will be used reshape the valley wall behind the three properties.

Site restoration will be completed following construction, including vegetation of the buttress using a native seed mix. Additional trees will be planted to offset the trees that were removed as part of the works.

Illustration of what the Project site may look like upon completion of remedial works
The above rendering provides an illustration of what the designed vegetated rubble fill buttress solution at 30, 32 and 36 Rose Park Crescent may look like upon completion of remedial works.

Construction Information

Construction started in June 2020 and should be completed by Fall 2020.

Prior to undertaking work, Midome Construction Services Inc. installed perimeter construction fencing around the work site to ensure public safety and isolate the work area. Erosion and sediment controls were also implemented.

Site access will be from the top of slope and the construction will be limited to private lands. This will strongly mitigate some of the impacts to the valley land and will keep equipment and materials away from Yellow Creek, ensuring minimal damage to the ecological health of the ravine and watercourse.

Regular construction updates will be posted to keep stakeholders aware of new information as it becomes available.

Public Notices

Declaration of Emergency Works
TRCA declared emergency works on November 19, 2018. An emergency works declaration was distributed to Councillor Mike Layton (Ward 11), as well as to the City of Toronto and the Ministry of the Environment, Conservation and Parks (MECP).

Notice of Construction
TRCA has installed the following information signs on the construction fencing around the perimeter of the work area on Rose Park Crescent. In addition, TRCA hand delivered notice letters to residences near the project area prior to construction.

Project Updates

Check here for weekly construction updates. Our team greatly appreciates your continued patience while we work on this project.

Update: July 3, 2020

Temporary construction fencing to delineate the work area and temporary staging area has been installed. Tree protection fencing has also been installed and required tree removals/pruning completed to facilitate restoration works. Erosion and sediment control measures have been installed throughout the site, installation of the conveyor belt to facilitate efficient material delivery completed and the removal of debris and talus material commenced.

Installed conveyor belt at the top of slope and removal of debris/talus material by Midome Construction Services Ltd. staff can be seen at the toe of slope.

Contact Us

The Project Planning Team is located at TRCA’s Boyd Field Centre in Vaughan:

Restoration & Infrastructure Division, Engineering Projects
9755 Canada Company Ave
Vaughan, Ontario
L4H 0A3

For more information regarding this project, please contact Jaya Soora, Project Manager.

Jaya Soora, Project Manager
Engineering Projects
Restoration & Infrastructure Division
jaya.soora@trca.ca
416-661-6600 ext. 5533