McHugh Bluff slope remediation project

Project update – October 2022

We are continuing to monitor the site for changes in slope conditions and stability. Our contractor has installed Geocoir matting on the upper part of the slope to help mitigate erosion.

We are completing the stability work in two phases:

  • Phase one: Stabilize the upper portion of the slope.
  • Phase two: Stabilize the lower portion of the slope.

We are currently in the phase one design stage. Once design and construction plans are finalized, we will be able to develop a more detailed construction timeline. Construction is likely to begin in 2023.

Project overview

In August 2021, heavy rain caused a section of the McHugh Bluff slope behind houses on 3 Avenue N.W. to become instable. The City of Calgary engaged contractors to monitor the site and provide a geotechnical report of the slope failure. Following their review, a plan was presented to Council to remediate issues along the slope, both in the short-term and long-term. This work includes installing:

  • soil nails with shotcrete
  • sheet drains
  • horizontal slope drains
  • high strength wire mesh/steel plates/geosynthetics
  • reconstruction of the existing gabion basket retaining wall adjacent to the pathway

Short-term remediation measures were completed on part of McHugh Slope in spring 2022. To delay the process of surface slope erosion in the short-term, the erosion gullies were secured with coir matting.

We’ve had to close the pathway along the McHugh Bluff for the foreseeable future, due to slope failure. Please see the map below for the closure and detour.

Frequently Asked Questions

Is there currently any danger to the adjacent homes?

No, The City of Calgary and our contracted partners continue to monitor the slope. Repair work is expected to begin in 2023.

Why is the pathway closed?

Following a slope failure, trees and other material fell onto the pathway. Out of an abundance of caution and to protect the slope stability until construction work can begin, the pathway has been closed. Please follow the signs onsite and use the detours provided.

Timelines

  • Preliminary design: Fall 2022
  • Contract tender: Winter 2023
  • Contract award: Spring 2023
  • Construction: 2023

This information has no legal status and cannot be used as an official interpretation of the various bylaws, codes and regulations currently in effect. The City of Calgary accepts no responsibility to persons relying solely on this information. Web pages are updated periodically. ​