MBTA Downtown Crossing Station

Location: MA (2016)

Owner: Massachusetts Bay Transportation Authority

As part of the MBTA program to improve ADA accessibility for their stations, Kleinfelder, the prime consultant for implementing such upgrades at the Downtown Crossing Station (DTX) engaged Reliance Engineers for participation in the development of an alternate station design concept for DTX. Originally
designed as a four independent elevator scheme, site constraints and construction logistics led the design team toward an alternative that eliminates two elevator locations, doubles the elevators at the remaining two locations, and extends the elevators to a level below the Red Line where the two separate banks of elevators are interconnected by a pedestrian tunnel. The revised approach as compared to the original design significantly reduces the risk, can be constructed with fewer impacts to surface streets, utilities, and the community, and provides better operational redundancy. Reliance Engineers’ scope involves constructability review, design assistance, and review of many technical areas such as tunneling, structural design, geotechnical design, instrumentation, and monitoring. Reliance is also providing design services for general civil engineering, utility relocation and coordination, and permitting assistance with Boston Water and Sewer Commission. The construction cost of this project is $50 million.