Cashman was retained as the prime contractor to construct a new interchange, linking the Massachusetts Turnpike to the city of Worcester, MA via Routes 20 and 146. Cashman’s scope of work involved large-scale earthworks and road building, extensive pile-driving, and the construction of drilled caissons, four highway bridges, and approximately four miles of two-, three-, and four-lane roadway and exit/entrance ramps.

JCI was also responsible for constructing the associated retaining walls and completing the survey, protection, and relocation of utilities. Cashman also installed a new 270-vehicle park-and-ride facility for commuter buses and cars, and restored the wetlands that had been removed or excavated.

This project began with the demolition of three existing highway bridges. This task required extensive coordination with the Turnpike Authority and a complex construction phasing plan to maintain and protect the flow of commuter traffic though the site area while the new highway bridges, roadways, and ramps were being constructed.

Specifically, Cashman developed traffic plans, set up clearly marked barriers, and re-directed traffic lanes away from the site work. Cashman was also responsible for successfully relocating Church Street using stanchions and ramps. As with other tasks, Cashman completed this relocation effort by coordinating traffic maintenance and protection with a complete staging plan.

The site also contained contaminated soils, both TPH and metals. An innovative solution was to leave these soils on site and incorporate them within impermeable cells within the permanent road embankment.