The SilverLine Phase III Project was the final segment of the Massachusetts Bay Transportation Authority’s (MBTA’s) Bus Rapid Transit (BRT) project. Phase III links the existing Silver Line/ Washington Street Service (Phase I) and the existing Silver Line / Waterfront Service (Phase II).
Gall Zeidler Consultants (GZ) participated as a member of the Value Engineering Team for the project and also provided project management oversight consulting services. GZ was also part of a formal risk assessment workshop for the project.
Twin Mined Tunnels and Stations
Approximately 1 mile (1.6 kilometers)
Station Tunnels: 34 feet (10.4 meters) Wide and 30 feet (9.1 meters) High
Running Tunnels: 21.5 foot (6.5 meter) Diameter
Fill, Organics, Boston Blue Clay, Glacial Till, and Cambridge Argillite
Approximately $2.1 Billion
LZ Associates (Value Engineering Expert Board), PGH Wong Engineering (Program Management Oversight)
Massachusetts Bay Transportation Authority (MBTA)