{"nrhp_refnum":"88000780","name":"County Bridge No. 101","other_names":[],"category":"structure","location":{"address":"Wagontown Rd. over Brandywine Creek","address_restricted":false,"city":"Rock Run","county":"Chester County","state":"PA","lat":39.99147438800003,"lon":-75.83084328499996,"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. 101 is a masonry stone arch bridge carrying Wagontown Road over Brandywine Creek at Rock Run in Valley Township, Chester County, Pennsylvania. It was built in 1918 and has four main spans of 40 feet each, totaling 160 feet.","why_significant":"The nomination argues the bridge is significant in engineering for its stilted arch design, which gives it a more attenuated appearance than most stone bridges in the thematic group. The bridge is unaltered and is said to retain excellent integrity.","narrative":"Built in 1918, County Bridge No. 101 is a stone arch bridge carrying Wagontown Road across Brandywine Creek in Valley Township, Chester County, Pennsylvania. The structure is 250 feet long and has four main spans of 40 feet each, with the sidewalks and parts of the masonry finished in light grey stone. Its arches are stilted, a shape that gives the bridge a taller, more slender profile than most stone bridges of its type. The Corcorn Construction Company is named as the builder. Its stilted arch design is the reason for its listing, as it is regarded as an unusual approach to stone arch bridge construction with clear engineering interest. Piers extended on the upstream side are noted as a distinctive feature. The bridge has not been altered, and it retains excellent integrity from its original construction. It was listed under the Highway Bridges Owned by the Commonwealth of Pennsylvania multiple resource group.","period_of_significance":null,"architect_builder":"Corcorn Construction Co. (builder)","architectural_style":null,"criteria":[],"status_note":"Unaltered; retains excellent integrity","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.57282-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000780.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000780/cab659e388-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000780/cab659e388-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:County_Bridge_No._101.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:County_Bridge_No._101.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992668","wikipedia":"https://en.wikipedia.org/wiki/County_Bridge_No._101","wikidata":"https://www.wikidata.org/wiki/Q5177627"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/chester-county/county-bridge-no-101-88000780/"}