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Douglasdale and McKenzie Lake Slope Stability Project

Project update - Jan. 5, 2017

Slope movements on the escarpment east of the Bow River adjacent to the communities of Douglasdale and McKenzie Lake have caused damage to The City’s pathway along a 3.5 km section.

The City has nearly completed ground improvement on the most urgent section (approximately 75 metres) as part of a priority remediation of the slope and pathway. Currently, one kilometre of pathway is closed in that area to facilitate construction and as a safety precaution.

Geotechnical consultants developed a detailed design for this remediation work which has involved using construction equipment to drill piles to provide firm ground on the pathway area at the top of the slope where the pathway has collapsed. Watch a short video of this work.

In 2017 crews will continue with the extended areas of ground improvement, working toward a long-term solution.

For safety reasons fencing has been set up to seal off the construction area. The City asks citizens to follow the detour signs and to not access either the closed area or the slope below it. This is for the public’s safety and to maintain the stability of the slopes.

Monitoring of the pathway is ongoing to ensure detection of any further erosion.

Pathway closure in effect –update on pathway closure

The City closed approximately one kilometre of the pathway for safety reasons in August 2016 and it remains closed. The pathway has been detoured along Mt. Alberta View and Mt. Douglas Close S.E. until remediation of the slope and the pathway can be completed.

Long-term solution

The City continues with plans to develop a design to protect the 3.5 km section of the pathway, as identified in the report presented to committee and Council in late fall 2015. The process involves developing detailed design, additional data collection and construction.

Slope stability projects are highly complex and this work will require more data in order to design the best solution. One solution will not fit every section of the pathway – there may be a variety of solutions developed in order to meet the conditions in each section.

About the project

Slope movements on the escarpment east of the Bow River adjacent to the communities of Douglasdale and McKenzie Lake have caused damage to The City’s pathway along a 3.5 km section.

Since 2005, The City has worked with external consultants to monitor, investigate and develop remediation options for The City’s Infrastructure (the slope and the pathway) in accordance with the Slope Stability Management Framework. In August 2015, a geotechnical consultant completed a Feasibility Study with initial recommendations and cost estimates for the long-term stabilization of the slope and remediation of the pathway. The City’s responsibility is to stabilize the slope and the pathway to ensure the safety of pathway users.

In 2016 The City began working on the design and construction of a solution to improve the stability of the slope and the pathway that supports the slope. The project will take place in phases and over several years.

Heavy rain during the summer of 2016 caused erosion of the pathway in a section behind Mt. Alberta View. Through an inspection process The City closed the pathway for safety reasons. The City will continue to monitor the slope and the pathway.

Project timeline

September 2016 - Remediation work begins on most urgent section of pathway instability

Spring 2017 - Remediation work will continue to improve ground stabilization; construction of long-term solution will begin

Communication

The City will continue to provide updates including updates to this webpage.

Please fill out the 311 online form if you require more information.

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