{"nrhp_refnum":"99001320","name":"AuSable Chasm Bridge","other_names":["Bin #1-07130-0"],"category":"structure","location":{"address":"NY 9 over AuSable R.","address_restricted":false,"city":"AuSable","county":"Clinton County","state":"NY","lat":44.52479804300003,"lon":-73.46297104899998,"geom_source":"nps_gis"},"listed_date":"1999-11-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Entertainment/Recreation","Engineering","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A steel arch highway bridge with two stone-faced concrete approach spans that carries NYS Route 9 over the AuSable River near the hamlet of AuSable Chasm, in Clinton and Essex Counties, New York. It was built in 1932-34 by the New York State Department of Public Works.","why_significant":"The nomination argues the bridge is an intact, well-designed example of WPA-era highway bridge engineering, deliberately styled with local stone to blend with the gorge setting. It is also tied to the growth of Adirondack tourism around AuSable Chasm and to the history of Route 9 as a major north-south route.","narrative":"Spanning the AuSable River gorge near the hamlet of AuSable Chasm, this bridge carries NYS Route 9 on a 222-foot steel arch main span, flanked by two 52-foot concrete approach spans faced in native stone. The overall length is 526 feet. State engineers and architects designed it, Burr M. Stark of Hadley won the construction contract with a bid of $63,323, and work ran from 1932 to 1934. It replaced an older route that wound through the hamlet and crossed on the one-lane, light-load Old State Road Bridge. Sandstone and granite on the abutments, railings and retaining walls help it blend with the gorge and nearby stone buildings. The bridge is listed for its engineering and design, as an intact example of 1930s highway bridge construction, and for its links to tourism at AuSable Chasm and to north-south travel through the region. Work around 1990 included repainting the steel and repointing the stonework.","period_of_significance":"1933-1948","architect_builder":"C.C. MacCloskey (engineer); Burr M. Stark (builder); New York State Dept. of Public Works (architect/engineer)","architectural_style":"OTHER: Steel Arch Bridge","criteria":["A","C"],"status_note":"Described as well maintained by the state and recently restored (painting and repointing), retaining much of its original appearance and integrity. It still carries NYS Route 9.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:50.828363-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/99001320.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/99001320/246524f7a1-800.webp","url_1600":"https://nationalhistoricalregister.com/media/99001320/246524f7a1-1600.webp","licence":"CC BY-SA 3.0","author":"Mwanner","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_over_the_Ausable_Chasm,_Clinton_County,_New_York.jpg\" rel=\"noopener\">Mwanner</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_over_the_Ausable_Chasm,_Clinton_County,_New_York.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75312359","wikipedia":"https://en.wikipedia.org/wiki/AuSable_Chasm_Bridge","wikidata":"https://www.wikidata.org/wiki/Q4818933"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/clinton-county/ausable-chasm-bridge-99001320/"}