Tunneling on Metrolinx’s Eglinton Crosstown West Extension has passed the halfway point, with Renny, one of the two tunnel boring machines (TBMs), digging over three kilometers (1.9 miles) of the roughly six-kilometer (3.7 mile) tunnel.
The 9.2-kilometer (5.7-mile) extension of the Eglinton Crosstown LRT will run from the future Mount Dennis station to Renforth Drive and will operate mainly underground. Once complete, it will create a continuous rapid transit line that stretches from Scarborough, through midtown Toronto, and into Mississauga.
Tunnelling started last April from the tunnel launch site near Renforth Drive, with the TBMs making their way to west of Scarlett Road where the TBMs will emerge from underground.
The second tunnel boring machine, known as Rexy, is not far behind Renny. Since July, Rexy has tunneled 2.45 kilometers (1.5 meters) and reached the first headwall location at Martin Grove Road.
![TBMs for the Eglinton Crosstown West Extension in the Toronto area began working to bore twin tunnels as part of the subway extension project on April 11. [Metrolinx]](https://img.masstransitmag.com/files/base/cygnus/mass/image/2022/04/16x9/EglintonCrosstownWest_TunnelLaunchSite_creditMetrolinx.62559ec7a8e6c.png?auto=format,compress&fit=crop&q=45&h=139&height=139&w=250&width=250 "TBMs for the Eglinton Crosstown West Extension in the Toronto area began working to bore twin tunnels as part of the subway extension project on April 11. [Metrolinx]")
