North Shore Connector

Trumbull constructed twin-tube bored light-rail tunnels underneath the Allegheny River, a cut-and-cover tunnel including two station shells and launch and receiving pits for the tunnel boring machine. The project included utility support and replacement, excavation, shoring of the excavated tunneling alignment, soil stabilization, monitoring of buildings adjacent to the alignment, the underpinning of a major interstate highway bridge, as well as various urban beautification aspects.