SR 0050 – 001 Heidelberg Bridge over Chartiers Creek, Allegheny County, PennDOT District 11-0

Tri-State Design was engaged to design the replacement of an existing, deteriorated, six-span bridge and its approach roadways. The project included structural and roadway design, demolition plans, hydraulic and hydrologic studies, signalized intersection design, erosion and sedimentation control plans, lighting, and maintenance and protection of traffic. The total length of the project was 1,450 feet. Several roadway alignments and structure types were investigated. The selected alignment placed the new bridge adjacent to the existing northbound structure. The selected structure type was a 346’ long 3-span continuous steel plate girder system with a reinforced concrete deck. The framing of the bridge consisted of four 5-foot deep girders at 10-foot spacing. The substructure units were reinforced concrete piers and abutments. Steel H-piles driven to bedrock support the abutments; the pier footings rest directly on bedrock. As part of this project, Tri-State designed a progressive movement, traffic actuated system to enhance traffic flow along this section of Route 50.

Tri-State received a perfect performance rating from the Department for its efforts on this project.