{"nrhp_refnum":"88000806","name":"Holme Avenue Bridge","other_names":[],"category":"structure","location":{"address":"Holme Ave. over Wooden Bridge Run","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":40.05644627700008,"lon":-75.02306418699999,"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 concrete arch highway bridge carrying Holme Avenue in Philadelphia, Pennsylvania, built in 1921 with a single 80-foot main arch span. The form records its designer and engineer as unknown and names C.P. Boner as builder/contractor.","why_significant":"The nomination argues the bridge is a good example of an urban concrete bridge whose surfaces were embellished to imitate stone. It cites rusticated spandrel and abutment walls, molded parapets and mildly exposed aggregate finishes as features typical of the period's efforts to relieve the stark appearance of concrete. It is grouped with several other embellished concrete arches built in Philadelphia.","narrative":"Holme Avenue Bridge is a reinforced concrete arch bridge in Philadelphia, completed in 1921 with a single main arch span of 80 feet. The structure was built by C.P. Boner and carries vehicular traffic over Wooden Bridge Run in the Frankford area. Its design reflects a period when engineers working in cities and parks often faced bare concrete with decorative treatments. Here the spandrel and abutment walls are rusticated to suggest masonry, the parapets are molded, and the surfaces show a light exposure of aggregate. Slightly green concrete, stripped from its forms before full curing, could be washed and brushed to reveal the stone-like texture. The bridge is recognized as a good local example of this approach to finishing concrete. It is one of several embellished concrete arches built in Philadelphia in the same era, and it remains essentially unaltered. The nominated area covers the superstructure and substructure within the wing walls, and is less than one acre.","period_of_significance":"1921","architect_builder":"C.P. Boner (builder/contractor)","architectural_style":null,"criteria":[],"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 17:11:37.096421-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000806.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000806/9d51473e35-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000806/9d51473e35-1600.webp","licence":"Public domain","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Holme_Ave_Bridge_Philly.JPG\" rel=\"noopener\">Smallbones</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Holme_Ave_Bridge_Philly.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993795","wikipedia":"https://en.wikipedia.org/wiki/Holme_Avenue_Bridge","wikidata":"https://www.wikidata.org/wiki/Q15224562"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/holme-avenue-bridge-88000806/"}