Metrolinx Caisson Drilling
Metrolinx is conducting caisson drilling over the next five months. This involves boring (or drilling) a hole into the ground down to more supportive bedrock, lifting in steel reinforcements (or rebar cage), and then pouring concrete. This creates reinforced concrete columns underground that will form structural piers to support the load of the elevated guideway structure above.
The work is scheduled to take place during the day and overnight from February to July 2021. While most of this work is carried out during the day, crews will also be working overnight as the equipment will be available and they will be able to work more safely and efficiently.