30–36 ROSE PARK CRESCENT
SLOPE STABILIZATION PROJECT

About This Project

Following a heavy rainfall event in 2017, a major slope failure occurred behind three private residential properties located on Rose Park Crescent in the City of Toronto. The project area borders the Vale of Avoca Ravine near David A. Balfour Park, in the Don River watershed.

To protect the slope and the houses on top of it, Toronto and Region Conservation Authority (TRCA), in partnership with the City of Toronto, installed temporary protection measures. These measures included: tarping the entire exposed failure area; extending all existing rear downspouts to the toe of slope; and completing monthly erosion monitoring inspections to record potential movement and changes within the erosion hazard area.

In 2019, a slope stability and erosion assessment was conducted to assess long-term risk to the area. The assessment report was then used to develop designs for the erosion control structure and restoration.

In 2020, TRCA constructed a rubble-fill buttress, which provided the best outcome for land preservation, ecological health of the surrounding rivers and valley streams, and would require minimal long-term maintenance. Restoration of the site included planting various native shrubs and trees as well as a native grassy seed mix on the slope.

As part of the long-term solution for the Project, TRCA will be completing monthly and post-storm inspections of the erosion control structure behind 30–36 Rose Park Crescent. These inspections will monitor the efficacy of the new buttress structure and flag any deficiencies that require repair.

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