{"nrhp_refnum":"88000851","name":"Adams Avenue Bridge in Philadelphia","other_names":[],"category":"structure","location":{"address":"Adams Ave. over Tacony Creek","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":40.042067925000026,"lon":-75.11285364099996,"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 three-span multiple-arch stone bridge carrying Adams Avenue over Tacony Creek in Philadelphia, Pennsylvania. The form dates it to 1901 and lists it as altered, with masonry repairs.","why_significant":"The nomination argues the bridge is an unusual stylistic composite of masonry features found individually on other Pennsylvania bridges. It combines a recessed arch, pyramidal piers, smaller parapet stones than the spandrel walls, and projecting unfinished parapet caps more typical of 19th-century bridges. The form states this combination is unique among the nominated bridges, and the area of significance is engineering.","narrative":"Adams Avenue crosses Tacony Creek in Philadelphia on a three-span stone arch bridge, with main spans of 25 feet each and an overall length of 100 feet. The structure dates from 1901 according to the record, and its designer and builder are unknown. Its masonry is coursed, and the piers are pyramidal in shape. The arch section is recessed, a feature associated with some late nineteenth-century bridges in Montgomery County. The parapet walls use much smaller stones than the spandrel walls and are capped with a course of unfinished, projecting stones, a detail more often seen on 19th-century bridges. The bridge is regarded as an unusual combination of these features, which the nomination finds unique among the Pennsylvania bridges it considers. The bridge has been altered, and its masonry has been repaired. Its significance rests on its engineering design and construction.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Altered; masonry repaired","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:35.863624-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000851.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000851/d4d4b12431-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000851/d4d4b12431-1600.webp","licence":"CC BY 3.0","author":"Michael E Reali Jr (Wiki Takes Philadelphia 2 participant)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:WTP2_Mike_Reali_07b.jpg\" rel=\"noopener\">Michael E Reali Jr (Wiki Takes Philadelphia 2 participant)</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\" rel=\"license noopener\">CC BY 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:WTP2_Mike_Reali_07b.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993805","wikipedia":"https://en.wikipedia.org/wiki/Adams_Avenue_Bridge","wikidata":"https://www.wikidata.org/wiki/Q4680294"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/adams-avenue-bridge-in-philadelphia-88000851/"}