Lawrence Street Bridge Deck
TEC's structural team provided engineering services for the final design and construction of the Lawrence Street Bridge over the Concord River deck replacement project. The existing weight restricted six-span bridge consisted of 10 reinforced concrete precast concrete beams supporting a reinforced concrete deck and an asphalt wearing surface, with substandard bridge railings and no approach guardrail. The existing bridge deck was categorized as serious in the bridge inspection reports and the city had utilized road plates to cover significant areas of spalling throughout the deck.
TEC demonstrated through calculations that the weight restriction could be removed from the bridge with a lightweight concrete deck. The project was proposed in two phases, which allowed for one-lane alternating traffic to be maintained over the bridge during construction. The bridge design also accounted for improved safety features, such as AASHTO BR2 railings at both curb lines. This allowed for the use of ornamental handrails at the back of both sidewalks, which was consistent with the desired historic appearance requested by the local historic board.
Our team led the significant permitting efforts with the Massachusetts Department of Environmental Protection, USACE, Massachusetts Historic Commission, the local historic board, and the conservation commission.
TEC also provided construction administration services by acting as the city’s Resident Engineer throughout the construction phase of the project. We reviewed contractor shop drawings, RFI responses, and performed field visits to monitor construction progress.
Construction administration & inspection services