{"nrhp_refnum":"78001879","name":"Queensboro Bridge","other_names":["59th Street Bridge"],"category":"structure","location":{"address":"59th St.","address_restricted":false,"city":"New York","county":"Manhattan","state":"NY","lat":40.75714384900007,"lon":-73.95530116400397,"geom_source":"nps_gis"},"listed_date":"1978-12-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-span through cantilever truss bridge carrying roadways across the East River and Roosevelt Island between Queens and Manhattan, New York City, built between 1901 and 1909.","why_significant":"The nomination argues it was the longest, largest and heaviest cantilever bridge built up to its 1909 completion, with an unusual design lacking suspended spans. It was also the first major bridge to involve an architect from conception onward, and it symbolized the 1903 unification of New York City's boroughs. Its Manhattan approaches include a Guastavino-vaulted public market.","narrative":"Spanning the East River between Queens and Manhattan by way of Roosevelt Island, this steel through cantilever bridge was built from 1901 to 1909. It measures 4,168 feet overall, with a 1,182-foot main span and a 988-foot lesser span, and stands on four granite piers. Unusually, neither span has a suspended truss; each is hinged at its center. At completion it was the longest, largest and heaviest cantilever bridge ever built. Engineer Gustav Lindenthal brought in architect Henry Hornbostel from the start, a practice that later became nearly universal. Hornbostel reshaped the steelwork and designed the Beaux Arts approaches in Manhattan, with rusticated anchorages, arcades and ornate kiosks. Beneath those approaches, Raphael Guastavino built a 47,000-square-foot public market with Catalan tile vaults, used until 1936. The bridge also served as a physical symbol of the 1903 consolidation of New York City's boroughs. It remains publicly owned and open to vehicles.","period_of_significance":"1900-1999 (specific date 1909)","architect_builder":"Gustav Lindenthal / Henry Hornbostel","architectural_style":"Beaux Arts (architectural treatment of approaches and superstructure)","criteria":[],"status_note":"Occupied and in use for transportation; condition marked good and altered. Now limited to vehicular traffic. The market space under the Manhattan approach remains in use as storage for city trucks.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:39.936208-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/78001879.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78001879/4d88db5094-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78001879/4d88db5094-1600.webp","licence":"CC BY-SA 4.0","author":"Jim.henderson","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Roosevelt_Is_south_from_QBB_SOW_2025_jeh.jpg\" rel=\"noopener\">Jim.henderson</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Roosevelt_Is_south_from_QBB_SOW_2025_jeh.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319845","wikipedia":"https://en.wikipedia.org/wiki/Queensboro_Bridge","wikidata":"https://www.wikidata.org/wiki/Q125157"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/manhattan/queensboro-bridge-78001879/"}