{"nrhp_refnum":"88000836","name":"Horsham-Montgomery Bridge","other_names":[],"category":"structure","location":{"address":"Lower State Rd. over Little Neshaminy Creek","address_restricted":false,"city":"Fort Washington","county":"Montgomery County","state":"PA","lat":40.237741750000055,"lon":-75.19147022099997,"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 stone highway bridge carrying a road between Horsham and Montgomery Townships over Little Neshaminy Creek, near Lower State Road in Montgomery County, Pennsylvania. It was built in 1839 and has two small arches with long flanking approach walls.","why_significant":"The nomination argues the bridge is a good example of a nineteenth century stone highway bridge. Its arch spans are set off from the body of the bridge by a built-in recession, a feature described as peculiar to Montgomery County. It is one of ten stone bridges in the nomination from that county, which together illustrate the continuing tradition of stone masonry bridge construction in Pennsylvania.","narrative":"Built in 1839, this stone highway bridge crosses Little Neshaminy Creek on Lower State Road, linking Horsham and Montgomery Townships in Montgomery County, Pennsylvania. It has two arches, each with a span of nineteen and one half feet, flanked by long approach walls. A small recession built into the masonry separates the arch spans from the rest of the bridge, visually emphasizing the arches. The design is regarded as peculiar to Montgomery County, where five stone arch bridges share it. The bridge is listed as one of ten stone bridges from the county that together show the long tradition of stone masonry bridge building in Pennsylvania, with construction dates from 1789 to 1910. Its engineering significance rests on this construction and its local variation. The east parapet has had extensive repair, and the nominated area is a rectangle of about 125 by 25 feet covering the bridge's superstructure and substructure.","period_of_significance":"1839","architect_builder":null,"architectural_style":"Stone masonry arch bridge","criteria":[],"status_note":"Extensive repair to east parapet is noted; the form lists it as altered.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.101359-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000836.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000836/7553b40a88-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000836/7553b40a88-1600.webp","licence":"Public domain","author":null,"credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:PA-Montco-HorshamMontcoBridge.jpg\" rel=\"noopener\">Unknown author</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:PA-Montco-HorshamMontcoBridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993384","wikipedia":"https://en.wikipedia.org/wiki/Horsham%E2%80%93Montgomery_Bridge","wikidata":"https://www.wikidata.org/wiki/Q5906338"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/horsham-montgomery-bridge-88000836/"}