{"nrhp_refnum":"88000835","name":"West Hickory Bridge","other_names":[],"category":"structure","location":{"address":"LR 598 over Allegheny River","address_restricted":false,"city":"West Hickory","county":"Forest County","state":"PA","lat":41.56988219400006,"lon":-79.40555729799996,"geom_source":"nps_gis"},"listed_date":"1988-06-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A multiple-span Pratt through-truss highway bridge crossing the Allegheny River between Hickory and Harmony Townships in Forest County, Pennsylvania, with a total length of about 695.5 feet across five spans. It is part of a thematic group of Commonwealth-owned highway bridges.","why_significant":"The nomination describes the bridge as a typical example of a multiple-span Pratt truss and one of the longest Pratt through-truss bridges in the nominated group. A bridge plate records fabrication in 1896 by the Groton Bridge Company for Hickory Bridge Company, and the nomination notes that few bridges in the group were built by that prominent firm. Significance is marked under engineering.","narrative":"Spanning the Allegheny River between Hickory and Harmony Townships in Forest County, Pennsylvania, the West Hickory Bridge is a multiple-span Pratt through-truss highway bridge. Its five spans measure about 695.5 feet overall, and the main span is 139 feet. A bridge plate records that it was fabricated in 1896 by the Groton Bridge Company for the Hickory Bridge Company. The steel superstructure carries diamond railings, and the piers are stone, partly overlaid with concrete. The bridge is one of the longer Pratt through-truss bridges in its thematic group, and only a few bridges in that group were built by the Groton firm. Its importance rests on its engineering design and construction. In 1942 a trestle section was removed and replaced with earth fill. The bridge remains in vehicular use.","period_of_significance":"1896","architect_builder":"Groton Bridge Company for Hickory Bridge Co. (builder/contractor)","architectural_style":null,"criteria":["A"],"status_note":"A 1942 alteration removed a trestle portion of the bridge and replaced it with fill; the bridge is in vehicular use.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.139989-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000835.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000835/79889f0aa5-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000835/79889f0aa5-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:West_Hickory_Bridge.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:West_Hickory_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992947","wikipedia":"https://en.wikipedia.org/wiki/West_Hickory_Bridge","wikidata":"https://www.wikidata.org/wiki/Q7985354"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/forest-county/west-hickory-bridge-88000835/"}