Islington Slope Stabilization Project – City of Vaughan

Project Description

Client: City of Vaughan


7409 Islington Avenue is a residential property located east of Islington Avenue, north of Highway 407. The City of Vaughan owns an active easement on the property to facilitate the servicing of a large residential subdivision with an existing 675 mm concrete sanitary trunk sewer and a 300 mm diameter PVC watermain. The City’s easement is situated on an embankment adjacent to a watercourse. A slope failure occurred, resulting in a section of the embankment to slide down the ravine. This slope failure presented an immediate risk of damage to both a residential building located 2.5 metres away from the slope failure and the City’s infrastructure. In response, Accardi Schaeffers was retained by the City of Vaughan to complete the design and construction administration for the project. 

  • Designed 20 concrete caissons with a diameter of 1 metre
  • Designed a storm sewer collection system to prevent further erosion.
  • Implemented an MSE system measuring 20 metres by 3 metres in height

Due to the limited construction access and the residential building’s close proximity to the failing slope, Accardi Schaeffers prepared a slope stabilization design. The design consisted of 20 concrete caissons with a diameter of 1 metre, a Maccaferri Terrawall MSE system measuring 20 metres by 3 metres in height, and a storm sewer collection system to prevent further erosion.

This design enabled our team to confine the area of environmental disturbance to the top section of the slope. Environmental works conducted as part of the project included a natural heritage impact assessment, a tree inventory, bird and amphibian surveys, a wetland impact assessment, a vegetation impact assessment, and the development of a density planting matrix. Our team coordinated with the Toronto and Region Conservation Authority (TRCA) and the Ministry of Natural Resources and Forestry (MNRF) to streamline the project’s execution for the City of Vaughan.


Other Projects You May Be Interested In

Accardi Schaeffers Project Profile Engineering Services Watermain Design

I&I Reduction Standard for Sewers Servicing – Regional Muni. of York