Fore River Bridge

2017-2018

Furnish & Install

Quincy | Weymouth, MA

Skanska

MassDOT

This project stands out in Atlantic’s history as one of the most unique challenges. In 2012, MassDOT commissioned a 250’ high vertical lift bridge to meet the demands of ship traffic in the Weymouth Fore River. A temporary bridge between Quincy and Weymouth had been erected in 2004 to replace the unsafe existing bridge and had to remain in place during construction. To accommodate this, Atlantic assembled the lift span on a dry dock half a mile upriver and then floated it down on barges. They then used a combination of the tides and flooding the barges to set the span in place. Once the lift span was in position, Atlantic strung up cables to the machine room and down to the counterweight. The counterweight was then jacked up and removed from the temporary pins, suspending from the cables. Erecting the approach slabs presented their own problem as they had to be coordinated with the removal of the temporary bridge to minimize traffic downtime. This delayed setting some of the girders but ultimately went smoothly. The project scope grew beyond the structural steel as two companies went out of business and one company left the joint-venture. Atlantic had to assist completing the fabrication and ended up completing the installation of all misc. metals work. The joint-venture relied on Atlantic to keep inventory of and track fabrication errors of the steel that had already been fabricated prior to Atlantic taking over the work.

Project Gallery