SR 3056, Section 005, Allegheny County, PennDOT District 11-0

This project consisted of the replacement of an existing 138’, 3-span bridge with approach roadways. As a result of the sharp skew and existing streets at each end of the bridge, the existing condition offered limited sight distance and sharp radii at the intersection of the streets, making it difficult for large vehicles to turn on and off of the bridge. Tri-State made extensive alternative studies during the TS&L stage, and proposed an 88′ single-span bridge. The proposed bridge offered better sight distance, larger turning radii, gained clearance over the railroad, and eliminated deep rock excavation in the vicinity of a residential neighborhood. A substantial cost savings was realized due to the proposed short span structure. Tri-State was responsible for the complete design, including PUC coordination, utilities relocation, and roadway, in addition to structure design.