During the maintenance operation, some ground material entered the TBM chamber, resulting in a hole in the asphalt in Clarke Road. This has since been filled with cement grout and additional ground improvements undertaken to stabilize the ground in front of the TBM.
Soon, tunnel boring will continue to the south tunnel portal located just south of Kemsley Avenue on the west side of Clarke Road in summer, 2015. The TBM will then be removed and crews will begin the installation of concrete within the tunnel, followed by track work and power systems. The Evergreen Line will be complete in the fall of 2016.
