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Cardinal Creek Slope Stabilization and Erosion Control


City of Ottawa


Ottawa, Ontario

Construction Value




Key Features

  • Slope stabilization
  • Erosion control
  • Private property
  • Site access constraints
  • Environmental approvals

Project Description

Cardinal Creek 2Robinson Consultants Inc. was retained by the City of Ottawa to undertake the preliminary and detailed design for the slope stabilization and erosion control at four locations on Cardinal Creek. The toe of slope at three of these locations was showing signs of erosion caused by the creek. Two of the sites showed evidence of active sloughing on the bank of the creek channel which had created steep slopes without any vegetation. A fourth site was not carried forward to design after a detailed field review and analysis concluded it to be of low risk. Slope stabilization and erosion control measures included reinforced soil system to stabilize slopes, erosion and scour protection at the toe of slope, and a planting plan with suitable native species to enhance slope stability. Site access and construction staging was a challenging issue due to the steep slopes and remote location of the sites. One of the sites was located entirely on private property.

Several activities were completed to assess the suitability of the proposed slope stabilization measures including: assessment of water levels and velocities within the creek, topographic survey in remote area with challenging conditions, constructability review, natural environment study, geotechnical investigation, slope stability analysis, Stage 1 archeological assessment, tree inventory and consultation with environmental regulatory agencies. Following the detailed assessments, Robinson Consultants Inc. completed the preliminary and detailed design including site access plans, temporary flow control, landscaping plans, and guiderail design. Robinson Consultants Inc. also prepared tender documents in accordance with the City of Ottawa standards, attended meetings with private property owners, and obtained the necessary environmental approvals.