Evergreen Line

Project Description

This project showcased the versatility and efficiency of Southwest Contracting’s ground improvement, shoring, excavation, and civil divisions. Working for the SNC Lavalin–Graham Construction Joint Venture (SGJV), SWC completed three phases of shoring and excavation beneath eight lanes of arterial roadway to create the launch pit for the Evergreen Line tunnel boring machine.

The work included approximately 22,000 yd³ of excavation, 18,800 ft² of shoring walls, 635 shoring anchors, 86 jet grout columns, 66 reinforced secant piles, 86 soldier piles, utility support installations, and the relocation of water and sanitary infrastructure, including the realignment of Barnet Highway.