{"nrhp_refnum":"88000850","name":"Frankford Avenue Bridge","other_names":[],"category":"structure","location":{"address":"Frankford Ave. over Poquessing Creek","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":40.04365295100007,"lon":-75.02048092399997,"geom_source":"nps_gis"},"listed_date":"1988-06-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A three-span stone arch bridge carrying Frankford Avenue over Pennypack Creek in Philadelphia, Pennsylvania. The form gives its present name as Frankford Avenue Bridge and its historic name as Frankford Ave. Bridge.","why_significant":"The nomination states the bridge is thought to be the oldest stone arch bridge still carrying a modern highway in America. It was an important link in the Kings Road, which eventually connected Philadelphia to New York. The three semi-circular arches are original and are well buttressed with rubble stone piers, and the nomination argues its engineering and transportation importance.","narrative":"Stone arch bridge crossing Pennypack Creek in Philadelphia, with three semi-circular masonry arches supported by rubble stone piers. The bridge formed part of the Kings Road, the route that eventually connected Philadelphia with New York. Local male residents of what was then Lower Dublin Township are said to have built it, paying either labor or money toward its construction. The road was paved in 1803 when it became part of the Frankford and Bristol Turnpike toll road. It was widened and reinforced in 1893, after which trolley tracks and automobiles crossed it. The original arches remain intact despite these changes. The nomination regards it as possibly the oldest stone arch bridge still carrying a modern highway in America, and its significance rests on engineering and transportation.","period_of_significance":null,"architect_builder":null,"architectural_style":"Semi-circular masonry arch","criteria":[],"status_note":"Widened and reinforced in 1893 and later fitted with guard rail and sidewalk; still carrying traffic according to the statement of significance.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.297783-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000850.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000850/c655741d07-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000850/c655741d07-1600.webp","licence":"Public domain","author":"Eliott, Joseph","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:3-4_VIEW_FROM_SOUTHEAST._-_Frankford_Avenue_Bridge_over_Poquessing_Creek,_Spanning_Poquessing_Creek_at_Frankford_Avenue_(U.S._Route_13),_Philadelphia,_Philadelphia_County,_PA_HAER_PA,51-PHILA,705-1.tif\" rel=\"noopener\">Eliott, Joseph</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:3-4_VIEW_FROM_SOUTHEAST._-_Frankford_Avenue_Bridge_over_Poquessing_Creek,_Spanning_Poquessing_Creek_at_Frankford_Avenue_(U.S._Route_13),_Philadelphia,_Philadelphia_County,_PA_HAER_PA,51-PHILA,705-1.tif"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993803","wikipedia":"https://en.wikipedia.org/wiki/Poquessing_Creek","wikidata":"https://www.wikidata.org/wiki/Q7229867"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/frankford-avenue-bridge-88000850/"}