{"nrhp_refnum":"75001676","name":"\"S\" Bridge","other_names":[],"category":"structure","location":{"address":"6 mi. W of Washington on U.S. 40","address_restricted":false,"city":"Washington","county":"Washington County","state":"PA","lat":40.13951151800006,"lon":-80.34979147599995,"geom_source":"nps_gis"},"listed_date":"1975-04-04","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A stone arch bridge carrying the National Road (National Pike) over a branch of Buffalo Creek in Washington County, Pennsylvania, roughly 45 feet wide and 130 feet long. The west end was demolished when Route 40 was built, but the surviving portion is described as being in good condition.","why_significant":"The bridge is associated with the National Pike, described as the greatest American road project of the 19th century, which was finished in 1818 and opened officially by Pennsylvania in 1835. The nomination ties the road to Washington County's commerce and communication between East and West, and to the taverns and inns that served its stagecoaches and wagon trains. Its masonry construction is the basis for its engineering and transportation significance.","narrative":"Spanning a branch of Buffalo Creek in Washington County, Pennsylvania, the S Bridge is a stone arch structure about 45 feet wide and 130 feet long. It was built to carry the National Road, the National Pike, which was basically finished in 1818. The road was conceived earlier under George Washington, and Albert Gallatin later pressed for its extension through the county while serving as Secretary of the Treasury under Jefferson. Pennsylvania did not officially open the road until 1835. Its builders used random and regular coursed ashlar and rubble masonry, with a dressed cope stone along the top and an arch of equal skewed voussoirs. The west end was demolished when Route 40 was built, but the surviving section remains in good condition. Taverns were operated at both ends of the bridge during the road's busiest years, and a post office once served the surrounding community. The bridge is now bypassed by U.S. 40 and sits in a roadside park.","period_of_significance":"1818","architect_builder":null,"architectural_style":null,"criteria":["A"],"status_note":"Surviving part in good condition; no longer in use since the relocation of U.S. 40, and now a roadside park where pedestrians may still walk over it.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.092078-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/75001676.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/75001676/e5a2937467-800.webp","url_1600":"https://nationalhistoricalregister.com/media/75001676/e5a2937467-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Claysville_S_Bridge,_eastern_end.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Claysville_S_Bridge,_eastern_end.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71998558","wikipedia":"https://en.wikipedia.org/wiki/Claysville_S_Bridge","wikidata":"https://www.wikidata.org/wiki/Q1099245"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/washington-county/s-bridge-75001676/"}