Port Authority North Shore Tunnel

Trumbull constructed twin tube bored tunnels underneath the Allegheny River, cut and cover tunnel including station shell, and launch and receiving pits for the tunnel boring machine (TBM). The work also included utility removal, relocation, support, and replacement, excavation, shoring of the excavated tunneling pits, cut and cover tunnel and station pits, soil stabilization, monitoring of buildings adjacent to the alignment, tunneling using the tunnel boring machine, placement of the precast tunnel lining, placement of cast-in-place (secondary) liner, controlled fill, and replacement of sidewalks and streets. The work also included the removal and replacement of existing retaining walls and foundation elements on the south shore of the Allegheny River, and underpinning of S.R. 0065 pier bents on the north shore.