This bridge is a traditionally composed example of a highway through plate girder in Pennsylvania. The through plate girder was common on railroads, and common in a couple states like Pennsylvania and New York, but in many states they are uncommon to find on highways. This example shows signs of substantial section loss in the girder web where the builder plaques are/were mounted, evidence of how placing metal on top of metal traps moisture leading to deterioration. What does this fact mean for preservation work? If bridge plaques are mounted on bridge superstructure metal, preservation work may involve remounting the plaque so that it does not rest against the metal. Placing washers on the bolts may accomplish this for example. Alternatively, sealing the area behind the plaque away from moisture may be a possibility.
Information and Findings From Pennsylvania's Historic Bridge Inventory
Discussion of Bridge
The 65'-long, built-up, steel through girder bridge, built in 1916, is supported on reinforced concrete abutments with wingwalls. Girder bridges were first developed by the railroad industry in the 1850s, and they were used on roadways beginning in the late 19th century. The bridge is a common type used by Washington County in the 1900s and into the 1910s. The bridge is of common design, and neither it nor its setting are historically or technologically significant.
Discussion of Surrounding Area
The bridge carries a two-lane road over a stream in an area dominated by undistinguished 20th century commercial development in the village of Finleyville. The area does not appear to have historic district potential.
Bridge Considered Historic By Survey: No
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