{"nrhp_refnum":"74001731","name":"John's Burnt Mill Bridge","other_names":["Camelback Bridge"],"category":"structure","location":{"address":"SW of New Oxford on T 428","address_restricted":false,"city":"New Oxford","county":"Adams County","state":"PA","lat":39.83244840800006,"lon":-77.07954775999997,"geom_source":"nps_gis"},"listed_date":"1974-12-16","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"John's Burnt Mill Bridge is a triple arched stone camelback bridge over a creek in Adams County, Pennsylvania, near New Oxford. It was built sometime between 1800 and 1823.","why_significant":"The nomination argues the bridge is a well-built example of early stone bridge construction and one of the few surviving stone bridges of its kind in Adams County, where nine were once recorded. It is also presented as representative of the stone architecture and rural mill community of southern Pennsylvania in the late eighteenth and early nineteenth centuries.","narrative":"Built sometime between 1800 and 1823, this triple arched stone bridge crosses a creek near New Oxford in Adams County. Its three arches are of random course fieldstone, with the two end arches about seven feet high and the central arch about nine feet high. The main span is about 50 feet long and the bridge is roughly 14 feet wide, with a capped stone deck, mortared end sections, and seven metal tie rods giving lateral support. Two stone ice breakers sit on the upstream side. Its arches were built over wooden forms that were removed only after the keystones were set. Records held by the Adams County Historical Society indicate that nine stone bridges once stood in the county, and this is the only one remaining in southern Adams County. It is regarded as a notable surviving example of early stone camelback construction, and its setting near a group of stone houses dating before 1850 reflects the mill community of the period.","period_of_significance":"1800-1823","architect_builder":null,"architectural_style":"Camelback bridge","criteria":["C"],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.325785-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/74001731.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/74001731/8535be0928-800.webp","url_1600":"https://nationalhistoricalregister.com/media/74001731/8535be0928-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Johns_burnt_mill_bridge_from_downstream.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:Johns_burnt_mill_bridge_from_downstream.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996728","wikipedia":"https://en.wikipedia.org/wiki/John%27s_Burnt_Mill_Bridge","wikidata":"https://www.wikidata.org/wiki/Q6217284"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/adams-county/johns-burnt-mill-bridge-74001731/"}