Tetra Tech provided civil and highway engineering and environmental permitting for this complex assignment under the Commonwealth of Massachusetts’ $3 billion Accelerated Bridge Program—the replacement of the historic Whittier Bridge over the Merrimack River and the reconstruction of a four-mile segment of I-95.

This Massachusetts Department of Transportation project, funded and reviewed by the Federal Highway Administration, was one of 14 projects selected nationwide by the Obama Administration to be expedited through the permitting and environmental review process. a A critical element of Tetra Tech’s design was the development of multiple staging concepts with detailed design of temporary alignments to accommodate bridge staging. The corridor underwent a complete redesign of the interstate drainage system to comply with new stormwater standards, realignment of the interstate to accommodate the new bridges, and relocation of affected utilities.

Tetra Tech prepared a Massachusetts Environmental Policy Act (MEPA) environmental notification form, a combined National Environmental Policy Act environmental assessment and MEPA environmental impact report, and environmental permits, leading to a Request for Proposal package for design-build services. Our firm succeeded in preparing the environmental permit applications under a tight time frame to meet the accelerated schedule.