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This large truss bridge is an extremely late example of a pin-connected truss bridge due to its 1927 construction date. By this time rivet connections were almost always the standard. This bridge is stylistically similar to another county-designed 1920s truss, the New Kensington Bridge. Long-span trusses like this one were once common in western Pennsylvania, but have been nearly eliminated by PennDOT. As such this bridge should be given a high preservation priority.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The 2,252' long, 9 span bridge is composed of 3, 382' long, pin-connected Parker thru truss spans, a 62' long deck girder and 2, Pratt thru trusses (1 @ 196', 1 @ 193'-7") on the north side and 3 Pratt thru trusses (1 @ 249'-6", 1 @ 198'-6", 1 @ 205') on the south side. The trusses are traditionally composed with built up box section for the upper chords and verticals and eye bars for the lower chords and diagonals. The bridge has no innovative or distinctive details other than its over size, and it is not historically or technologically significant. It is a bridge type and design that was used for major crossings since the late 19th century. The use of pinned connections was for ease of erection. The safety shape barriers inside the truss lines and the fence at the sidewalk were placed in 1988. The bridge is one of two similar Parker thru truss bridges built by the county in 1927 (see 02 1038 0010 0059). Discussion of Surrounding Area The McKeesport-Duquesne Bridge crosses the Monongahela River, active Conrail tracks on both sides of the Monongahela River, and a local road between McKeesport and Duquesne. It crosses Conrail and the Union RR on the north (Duquesne) shore and the former Pennsylvania, P & LE, and B & O RRs on the south shore. Bridge Considered Historic By Survey: Initially No, But Appears To Be Later Evaluated as Eligible |
This bridge is tagged with the following special condition(s): Unorganized Photos
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