{"nrhp_refnum":"79002163","name":"Sixteenth Street Bridge","other_names":[],"category":"structure","location":{"address":"Spans Allegheny River","address_restricted":false,"city":"Pittsburgh","county":"Allegheny County","state":"PA","lat":40.451212189000046,"lon":-79.99032043199998,"geom_source":"nps_gis"},"listed_date":"1979-08-13","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Art","Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A steel through-arch bridge carrying Sixteenth Street across the Allegheny River to Chestnut Street on Pittsburgh's North Side, erected in 1923.","why_significant":"The nomination argues the bridge aided the continued growth of industry and warehousing on the North Side, formerly Allegheny City. It presents the bridge as a major urban transportation link where engineering, architectural design and sculptural decoration are combined. Its design was supervised by the Municipal Art Commission of Pittsburgh, and the sculptural work is by Leo Lentelli. Reviewers also noted that the bridge was threatened and deserved National Register protection.","narrative":"Spanning the Allegheny River between Sixteenth Street and Chestnut Street on Pittsburgh's North Side, this steel through-arch bridge was erected in 1923 to replace an earlier wooden crossing destroyed by fire in 1918. Its three arches are its main visual feature: the central span measures 437 feet, flanked by spans of 229 feet, and its 43-foot roadway carries two-way traffic with two 7-foot walkways. Twin cut-stone piers at each approach carry bronze winged horses by sculptor Leo Lentelli, each bearing an armillary globe, while carved figures of youths and bearded old men look down from the keystones. The Municipal Art Commission of Pittsburgh oversaw the design, which replaced an earlier plan for triumphal arches with simpler piers. The bridge is significant for supporting industrial and warehouse expansion into the North Side, formerly Allegheny City, and for combining engineering, architecture and sculpture in a major urban crossing. It is also described as threatened.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":["A","B","C"],"status_note":"Described as threatened.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.199815-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002163.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002163/2693c1abd9-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002163/2693c1abd9-1600.webp","licence":"CC BY 2.0","author":"takomabibelot","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:SixteenthStreetBridgePittsburghPA.jpg\" rel=\"noopener\">takomabibelot</a>, <a href=\"https://creativecommons.org/licenses/by/2.0\" rel=\"license noopener\">CC BY 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:SixteenthStreetBridgePittsburghPA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71997692","wikipedia":"https://en.wikipedia.org/wiki/David_McCullough_Bridge","wikidata":"https://www.wikidata.org/wiki/Q4552241"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/allegheny-county/sixteenth-street-bridge-79002163/"}