This project is replacing and widening existing bridges carrying Interstate 495 northbound and southbound over the Merrimack River in Haverhill to address structural and functional deficiencies. The area extends from approximately Exit 48 south of the bridges to approximately Exit 49 north of the bridges.
For this project, MassDOT has utilized Design-Build Project delivery where one entity is responsible for both the design and construction. This alternative contracting method not only helps reduce the time needed to carry out the project, but also promotes collaboration between the engineers, contractor, and MassDOT staff.
The project also includes:
- localized widening and reconstruction of ramps
- roadway realignment, widening, and safety improvements
- roadway drainage system improvements
- pier protection barrier for existing bridge piers at interchange 48 and 49
- signage and pavement marking improvements
- utility relocation
- landscape restoration
- wetland mitigation
The project will minimize temporary environmental and vehicular travel impacts and mitigate noise during construction.
Temporary navigational lighting to USCG standards will be installed during construction in the water.
Anticipated Project & Work Schedule
Mobilize to site: August 2018
- Northbound Bridge Construction: September 2018 – September 2019
- Northbound Bridge Demolition & Construction: September 2019 – August 2020
- Implement Southbound Crossover – August 2020
- Southbound Bridge Demolition & Construction – August 2020 – September 2021
- Median Restoration: September 2021 – June 2022
Final Completion: June 2022
MassDOT – Owner
SPS New England – Design-Build Entity
HNTB – Lead Designer
Regina Villa Associates, Inc. – Public Outreach