The Merchant Street Bridge, located in Pittsburgh, Pennsylvania along the Fort Wayne Rail Line, is owned and operated by Norfolk Southern. The Merchant Street Bridge was constructed circa 1905 and consists of two skewed steel spans supported by stone masonry abutments and one intermediate steel pier. The ballast-deck superstructure is comprised of a concrete-filled riveted steel trough system that varies in length and width and carries four active railroad tracks. There is extensive steel corrosion within the cross girders and columns comprising the intermediate pier as well as throughout the riveted trough system. The project involves the on-alignment replacement of the bridge, which is a contributing resource of the National Register of Historic Places eligible Pennsylvania Railroad: Main Line (Pittsburgh to Ohio State Line) Railroad Historic District. The project also includes lowering the roadway to achieve 11'-3" clearance under the railroad bridge as well as roadway, drainage, pavement marking, and lighting upgrades. The project is receiving funding from the Pennsylvania Department of Transportation (PennDOT) with the remainder private funding from Norfolk Southern.