TBMs Rexy and Renny have wrapped up their work on the Eglinton Crosstown West Extension.  Over the past two years, the twin tunnel boring machines (TBMs) have been the driving force behind progress on the western underground segment of the extension. The project will bring future Eglinton Crosstown LRT service 9.2 kilometres farther west with seven new stations along the way.

he 750-tonne, 131-metre-long machines carefully excavated through the earth to construct two parallel tunnels stretching 6.3 kilometers from Renforth Drive in Mississauga to west of Scarlett Road in Etobicoke, where the future line will come to the surface and transition to a 1.5-kilometre elevated section. Renny broke through the final wall and emerged from the tunnel at the extraction shaft in May, approximately three weeks after the other TBM, Rexy, reached the finish line.   Along the way, Rexy and Renny excavated approximately 1.2 million tonnes of soil and rock and installed a total of more than 52,000 pre-cast concrete segments to build 7,433 sturdy rings to support the tunnel walls.