The Yarmouth Main Street bridge replacement project consists of replacing the existing 3-span arched concrete deck structure with a new structure that is nearly identical to the old. The bridge includes decorative pilasters on the piers and abutments which require detailed work to replicate the original structures. The project is phased construction with 2-way traffic required to be maintained on half of the old structure while the other half is removed and replaced. Additionally, two-way traffic and pedestrian sidewalks are maintained beneath the structure on Main Street with specifically allowed weekend closures of Main Street for demolition and falsework related activities. A combination of steel framing and a prefabricated deck forming system on a crane mat foundation is used during construction to form and place the arched concrete deck. Opening Phase 1 of the new bridge to traffic occurred in mid-June and demolition of the remaining half of the existing bridge followed immediately thereafter.
The approach roadwork for the project includes, relocating an on and off ramp for southbound Route 1 traffic, elevated final grades of mainline Route 1, utility relocations, and mitigating traffic impact to surrounding high-traffic roadways, intersections and nearby businesses and schools. Phased roadwork, including temporary pavement and various temporary traffic control patterns are used to manage this work.
Finish work below the bridge includes concrete sitting walls, granite pavers and extensive lighting. The bridge is a prominent structure located at the heart of Main Street in Yarmouth right next to City Hall and the town library and is where the annual Yarmouth Clam Festival is held and will undoubtedly be the centerpiece for the town events in the area.