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You know that when even Pennsylvania's outdated and overly conservative Historic Bridge Inventory says a truss bridge is historic, that the bridge is something extra special! Indeed, that is the case with this very old 1889 half-hip Pratt pony truss with pinned connections. The bridge features latticed vertical members. There is v-lacing on both sides of the end posts, which is unusual since normally cover plate would be expected on top of the built-up box section. Original pole railings remain on this bridge. The other unusual feature is the use of rolled star iron, also called cruciform, on the outriggers. Star iron usually shows up on 1870s truss bridges, such as the bowstring truss bridges that were common during that period. If the 1889 construction date listed for this bridge is accurate, this would be a late example of a bridge with star iron on it. Regardless, any bridge that has star iron on it is rare and has historic significance. This bridge is, based on its style, assumed to have been built by the Pittsburgh Bridge Company.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The single-span, 64'-long and 12' wide, pin-connected Pratt pony truss bridge built in 1889 is supported on one stone abutment and one concrete abutment. The lower chords and diagonals are loop forged eyebars, and the upper chords are channels and lacing. The verticals are laced back to back angles. Original features include the built up floor beams, pipe railings inside the truss lines and the outriggers. In a county and region with a deep and varied collection of metal truss bridges from the mid 1880s through the 1930s, this pony truss bridge stands out as an early and complete example. Discussion of Surrounding Area The bridge carries a single lane road over a stream in a sparsely developed, forested setting. Bridge Considered Historic By Survey: Yes |
This historic bridge has been demolished. This map is shown for reference purposes only.
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