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This skewed bridge is one of a very small number of state design through truss bridges to use a Baltimore truss configuration. The bridge has a heavy 45 degree skew, adding to its significance. The finding of this bridge as non-historic by the Historic Bridge Inventory shows a complete lack of understanding of the context of metal truss bridges in Pennsylvania. This bridge is a rare variation of standard state truss design. The department almost always used Parker and Pratt trusses in its standards, a Baltimore truss was rarely used. The bridge was thus significant as an example of the diverse design abilites of the state highway department. In other states, inventories would have found this bridge to be National Register Eligible.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The 1930, one span, 140'-long, Baltimore thru truss bridge is built on an extreme skew, which may contribute in part to the decision to use a truss design with subdivided and thus shorter panels resulting in reduced stresses in the floorbeams and stringers (hence smaller sections) and better distribution of loads into the trusses. The use of rolled I section for the verticals, substruts, and diagonals is not noteworthy as the detail was common by 1930. The bridge is supported on concrete abutments with flared wingwalls that were placed in 1994. The chords and end posts are built up box sections, and rolled floorbeams and stringers support the concrete deck. The original lattice railings have been removed and replaced with modern concrete barriers. The use of the truss design with subdivided panels in 1930 is not technologically or historically significant, and neither the bridge nor its setting are historically or technologically significant. Discussion of Surrounding Area The bridge carries a 2 lane state highway over a stream in a wooded setting with sparse development. Bridge Considered Historic By Survey: No |
This historic bridge has been demolished. This map is shown for reference purposes only.
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