Project Experience

Tunnels & Underground Construction

Combined Sewer Overflow and Riverfront Development Project

Combined Sewer Overflow and Riverfront Development Project

Center and Morgan Boulevard. The design-build project also included two parking garages, access roads, and Project Manager for the geotechnical investigations for an approximately seven-mile-long, large (up to 90-inch) diameter combined sewer overflow pipeline along...

Boston Harbor Effluent Outfall Tunnel

Boston Harbor Effluent Outfall Tunnel

The Boston Harbor Effluent Outfall Tunnel is a MWRA’s 25-ft diameter tunnel, extending approximately 9.5 miles out into Massachusetts Bay—the longest single-entry tunneled outfall in the world. The Boston Harbor cleanup project includes the Deer Island Treatment...

Holland Tunnel Seismic Vulnerability Assessment

Holland Tunnel Seismic Vulnerability Assessment

Holland Tunnel is a landmark tunnel connecting lower Manhattan and Jersey City. This is the first Hudson River vehicular crossing connecting Canal Street in Manhattan with 12th and 14th Streets in Jersey City. Sena Kumarasena, Ph.D., PE served as the Project Engineer...

SR99 Deep Bored Tunnel

SR99 Deep Bored Tunnel

SR99 is a $1.9 Billion WashDOT project. The tunnel is approximately 2 miles long and will replace the aging Alaskan Way Viaduct that was damaged in the Nisqually earthquake in 2001. Eldon Abbott, PE served as the Task Lead for the development of the Design-Build...

Northeast Boundary Tunnel

Northeast Boundary Tunnel

Emad Iskander, Ph.D., PE performed the design review of slurry wall shafts, Sequential Excavation Method (SEM) adits connecting to the tunnel, and support of excavation for near-surface structures. The century-old combined sewer system in the District of Columbia was...

Design of the Plane Train Tunnel West Extension

Design of the Plane Train Tunnel West Extension

The Plane Train tunnel project included developing of a 700-foot-long tunnel extension to the existing Plane Train automated people mover (APM) beyond the airport’s domestic baggage claim terminus station. This extension created a more efficient train turn-around...

Fort Point Channel Tunnel

Fort Point Channel Tunnel

Fort Point Channel Tunnel is a concrete immersed tube tunnel constructed as part of Boston’s Central Artery/Tunnel project. Tony Lancellotti, PE served as the Lead Engineer for the Type Study of various tunnel alternatives for this crossing including steel shell,...

Micro Tunnel under MBTA Red Line

Micro Tunnel under MBTA Red Line

This project involves a proposed utility crossing over MBTA’s historic Red Line tunnel in Cambridge, MA. Reliance is the Prime Consultant through our Mini-GEC contract for this review work on behalf of MBTA. The review resulted in the rejection of the originally...

Ontario Line Urban-Rail Extension

Ontario Line Urban-Rail Extension

Reliance is part of the Owner’s Technical Advisory Team providing services to Metrolinx, as a sub-consultant to HDR on a major urban rail expansion project. The proposed Ontario Line Urban-Rail Extension project involves the construction of approximately 12.8 km of...

Central Artery/Tunnel Project

Central Artery/Tunnel Project

The CA/T project, considered the largest infrastructure project undertaken in the US to date, involved the replacement of a congested, dysfunctional, and outdated six-lane elevated viaduct with a widened eight to ten-lane underground expressway constructed through the...

Ottawa Light Rail Transit

Ottawa Light Rail Transit

Ottawa Light Rail Transit is a 2.4-km-long two-track running tunnel and Rideau underground station. The tunnel is 10 m wide between spring lines with its crown between 12 and 26 m below ground surface. The tunnel was driven in the local Verulam and Lindsay sedimentary...