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This is a small pony truss that has been turned into a non-functional decoration by the addition of load-bearing stringers that run under the deck and carry the weight of traffic. Despite this alteration, the bridge remains an important historic bridge because it continues to convey its unusual design details which are outlined by the historic bridge inventory entry below. The inventory does not mention the unusual crosshatch style railing, that usually would this bridge with the York Bridge Company, which used this distinctive design of railing. However this bridge is one of two bridges in McKean County that displays this railing but appears to have been built before the York Bridge Company was created in 1901. As such, it is not known why this bridge has York Bridge Company style railing. It is possible that the York Bridge Company added the railings to these bridges under a county repair contract, however this is pure speculation. The attachment hardware for this mysterious railing also has some interesting detail.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The single span, 48'-long, pin-connected Pratt pony truss bridge built ca. 1890 is supported on concrete abutments. It has eye bar tension members and built-up compression members. Although traditionally composed, it has two distinctive details, the arrangement of the upper chord/vertical connections and the paired U-shaped floorbeam hangers. The upper chord/vertical connection consists of a pin plate placed inside of the toe-out channel built-up box section chord, and then riveted to angles which are in turn riveted to a plate located at the top of the vertical composed of toe-in angles with lacing. The rolled floorbeams are supported by two U-shaped hangers at each lower chord pin connection rather than the more common variation of one hanger. The bridge builder and date of construction are not documented by available records, but the bridge does reflect the variety of truss details used before widespread standardization and the preferences and activities of a fabricator active in this region of the state during the late-19th century. The bridge is historically and technologically significant as an increasingly rare and complete example of its type and design with distinctive details. Discussion of Surrounding Area The single lane bridge carries a township road over a stream in a sparsely developed, rural area with scattered 20th century residences. The setting does not have the cohesiveness or integrity of a potential historic district. Bridge Considered Historic By Survey: Yes |
This bridge is tagged with the following special condition(s): Trusses Converted To Decorative
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