This project involves the replacement of overhead Bridge No. B-502 at Turnpike milepost 110.12 which carries North Center Avenue (State Route 601) over the Pennsylvania Turnpike mainline. This project is located within the municipalities of Somerset Borough and Somerset Township, in Somerset County.
Work began in the spring of 2018, with construction of a substructure for a temporary bridge. The substructure, which included a pedestrian walkway, was then launched over the Turnpike in June 2018 during a nighttime closure. In July 2018 Waterworks Road and Snyder Street were closed, and traffic on North Center Avenue was moved onto the temporary bridge. Crews also built a temporary entrance to Wendy’s/Verizon and installed temporary traffic signals at the Wendy’s/Verizon and Starbucks/Ruby Tuesday intersections.
Demolition of the old bridge structure began soon after it was closed to traffic. The beams were removed during a nighttime closure of the Turnpike at the end of July 2018. Once the old abutments were demolished, construction of the new structure began. Steel beams were set on the newly constructed abutments and center pier during nighttime closures of the Turnpike in December 2018 and January 2019.
Work planned for the 2019 construction season includes building the bridge deck, barrier, and sidewalk in addition to construction of the permanent roadway approaches. When finished, this project will provide roadway surface improvements as well as roadway and pedestrian safety enhancements.
Upon completion the new, two-span steel-plate girder bridge will carry two 11-foot travel lanes, a center 14-foot turning lane, a four-foot shoulder with a five-foot curbed sidewalk on the western side of the bridge and a nine-foot shoulder on the eastern side. The bridge and road work will tie into the existing North Center Avenue (State Route 601) on the same existing roadway alignment.
The bridge replacement and approach work will cost an estimated $7.5 million and is fully funded by Pennsylvania Turnpike Commission toll revenue. The North Center Avenue Bridge Replacement Project is on schedule for completion in the fall of 2019.
The design and construction of this project is being administered by the Pennsylvania Turnpike Commission with the participation of PennDOT District 9-0.