{"nrhp_refnum":"88000760","name":"County Bridge No. 124","other_names":["Co. Br. 124"],"category":"structure","location":{"address":"Edge Hill Rd. over Beaver Creek","address_restricted":false,"city":"Downingtown","county":"Chester County","state":"PA","lat":40.010536029000036,"lon":-75.74390079899996,"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":"County Bridge No. 124 is a three-span masonry arch bridge over Beaver Creek on Edge Hill Road in Caln Township, Chester County, Pennsylvania. The nomination dates its construction to 1916 from a plaque built into the parapet.","why_significant":"The bridge is described as a well-preserved, typical example of the intermediate-length multi-span stone bridge built in Chester County in the nineteenth and early twentieth centuries. Its design is noted for high quality, including small conical piers and a continuous parapet with contrasting coping stone. It is listed as part of the Commonwealth of Pennsylvania highway bridges thematic group, with engineering added as an area of significance.","narrative":"Beaver Creek carries this three-span stone arch bridge on Edge Hill Road in Caln Township, Chester County, Pennsylvania. The structure measures 72 feet overall, with three spans of 24 feet each, and was built in 1916 by Dunleavy Bros., as recorded on a plaque set into the parapet wall. It is built of squared ashlar in the manner of nineteenth-century Pennsylvania stone bridges, and its design is considered high in quality. Features include small conical piers and a continuous parapet topped with contrasting sandstone coping. The survey form records the bridge as unaltered and in good condition. It is regarded as a very well-preserved, typical example of the intermediate-length multi-span stone bridge found in Chester County. Its recognition is part of a group of Commonwealth-owned highway bridges, and engineering was added as an area of significance.","period_of_significance":null,"architect_builder":"Dunleavy Bros. (builder/contractor)","architectural_style":"Arch bridge in the style of Pennsylvania's nineteenth-century stone bridges","criteria":[],"status_note":"Recorded as unaltered on the survey form","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.694137-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000760.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000760/015a41570f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000760/015a41570f-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:County_Bridge_No._124.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:County_Bridge_No._124.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992664","wikipedia":"https://en.wikipedia.org/wiki/County_Bridge_No._124","wikidata":"https://www.wikidata.org/wiki/Q5177629"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/chester-county/county-bridge-no-124-88000760/"}