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This bridge is a riveted Queenpost pony truss bridge. It does not feature any railings between the end posts, but outside of the endposts, a simple and unusual railing composed of rolled angles extends slightly beyond the truss, connected to the top of the abutments and the end posts. The bridge retains good historic integrity. The abutments are ashlar (stone) and the deck is concrete with an asphalt wearing surface.
Although Washington County has (or had) several Queenpost truss bridges, the truss type is nationally an uncommon truss type. Some historic bridge inventories, including Pennsylvania's do not recognize the Queenpost as a metal truss bridge type, instead classifying them as a Pratt. However, HistoricBridges.org believes that the truss type needs to be distinguished. The truss configuration was used only for some of the shortest crossings, and as such, surviving examples represent what small metal truss bridge construction looked like during this period in history.
Thanks to a lack of maintenance, the bridge deteriorated severely, developing widespread section loss on portions of the truss around the deck, including significant areas of 100% section loss. One vertical member was almost completely severed by a ring of 100% section loss. This bridge is an example of how our transportation heritage is being destroyed by a lack of maintenance.
Just less than two months after HistoricBridges.org documented the bridge, the bridge was closed to all traffic on July 26, 2010 due to the advanced deterioration. The bridge is slated for demolition and replacement.
Washington County still has a couple riveted Queenpost truss bridges left in the county. With the demolition of this bridge, it is imperative that these remaining examples be preserved in order to ensure this truss type continues to be represented in the region.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The three-panel, 40' long and 15' wide riveted Pratt pony truss bridge built in 1913 is supported on ashlar abutments with wingwalls. The upper chords and end posts are angles with cover plate, and the verticals and all other members are angles with battens. The deck is concrete. The bridge has no innovative or distinctive details, and it is an example of what by 1910 was a commonly used type and design in the county and region. Neither it nor its setting are historically or technologically significant. It was built by a prolific instate fabricator. Discussion of Surrounding Area The bridge carries one lane of a state road on a horizontal alignment over a stream in a sparsely developed, rural setting just south of the intersection of SR 4061 and SR 331. Bridge Considered Historic By Survey: No |
This bridge is closed to all traffic.
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