{"nrhp_refnum":"88000775","name":"Horse Valley Bridge","other_names":[],"category":"structure","location":{"address":"LR 28093 over Conodoguinet Creek","address_restricted":false,"city":"Upper Strasburg","county":"Franklin County","state":"PA","lat":40.06589385500007,"lon":-77.75907680899996,"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 three-span stone arch bridge carrying vehicular traffic over Conodoguinet Creek in Upper Strasburg area of Franklin County, Pennsylvania, on the old state route from Upper Strasburg to Fannetsburg. The form gives its overall length as 55 feet and its main spans as 16 feet each.","why_significant":"The nomination argues the bridge is one of four very fine examples of nineteenth century turnpike bridges in Franklin County. Its roughly coursed local limestone, semi-pyramidal piers and thin limestone coping are typical of county bridges built before 1860, and it is cited in F. F. Unger's descriptions of county bridges. Few stone bridges of this type in the county still stand.","narrative":"Spanning Conodoguinet Creek on the former state route between Upper Strasburg and Fannetsburg, this stone arch bridge has three arches, each measuring 16 feet, with a total length of 55 feet. Its builder and exact construction date are unknown, but it is generally dated to before 1860 on the basis of local bridge histories. The structure is built of roughly coursed local limestone, with semi-pyramidal piers and roughly cut thin limestone coping. These features match many stone arch bridges built in Franklin County during the nineteenth century, yet relatively few of that type survive. Its significance rests on its engineering as a surviving example of turnpike-era construction, and its condition is recorded as good. The bridge carries vehicular traffic through farmland and rural countryside, and it is noted for its double wingwalls set at ninety degrees to the roadway.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":null,"vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.999282-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000775.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000775/74b57d16fe-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000775/74b57d16fe-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Horse_Valley_Bridge_FrankCo_PA_1.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Horse_Valley_Bridge_FrankCo_PA_1.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992953","wikipedia":"https://en.wikipedia.org/wiki/Horse_Valley_Bridge","wikidata":"https://www.wikidata.org/wiki/Q5905567"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/franklin-county/horse-valley-bridge-88000775/"}