Due to the time of year, winter installation practices were put in place and followed by the General Contractor that complied with OPSS and MTO standards for the installation of the wall.

We customized the blocks for this project to be cut to fit around the precast culvert giving the wall an aesthetic, uniform appearance.

During the installation it was discovered that the road culvert had been installed approximately 1 m too far to the east. After careful review it was decided that the retaining wall that had been installed was “at risk” during the freeze-thaw cycles as it was not installed per the intended design.

The local engineering firm, CMT Engineering, responsible for the original design to discuss and design an alternative solution to address the challenge on site.

The solution proposed and accepted was to install a style of geo grid combination retaining wall system using galvanized steel bodkin bars anchored into the face of the existing wall at their base. Geo grid was then brought up the rear of the next course and laid on top of the newly installed rock.