Construction of the Chardon Street to Charles River link of I-93 requires building three highway tunnels (two four lanes wide) directly below the existing elevated structure.

Project Highlights

Chardon Street to Charles River
Boston, MA

• Supporting the existing structure with major underpinning at 19 existing highway bents.

• Installation of 420,000 square feet of slurry wall (the largest such slurry wall on the East Coast).

• Construction of 2,000 linear feet of multi-barrel tunnel while maintaining existing daily traffic of 180,000 vehicles overhead.

• Relocation of 3 miles of Gas, Sewer and Water mains.

• The site is at a major convergence point for heavy commuter traffic from north of the city.

• Adjacent is the new multi-million dollar Fleet Center which draws 18,000 fans to events 300 days a year.

• More than 250,000 pedestrians pass around or through the area daily.