{"nrhp_refnum":"99001326","name":"Walton Bridge","other_names":["Bin #3-30337-0"],"category":"structure","location":{"address":"Dr. Ray Rd. access over AuSable R.","address_restricted":false,"city":"Keene","county":"Essex County","state":"NY","lat":44.244778093000036,"lon":-73.79771362799994,"geom_source":"nps_gis"},"listed_date":"1999-11-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Engineering"],"significance_levels":["local"],"summary":{"what_it_is":"A single-lane lenticular metal through truss bridge, about 98 ft. long, carrying access to Dr. Ray Road over the East Branch of the AuSable River in Keene, Essex County, New York. It was built about 1890 in Black Brook, Clinton County, and moved to Keene in 1925.","why_significant":"The bridge is argued to be a rare survivor of its type, one of only about 50 surviving lenticular truss bridges in the United States, reflecting a period of innovation in 19th-century bridge design. It also served local transportation, linking farmsteads, small iron mines, forges and a sawmill to the rest of the community. It is a good example of a bridge moved and reused at another site.","narrative":"Spanning the East Branch of the AuSable River in a rural part of Keene, this single-lane lenticular truss bridge of steel with cast-iron ornament is about 98 feet long. The Berlin Iron Bridge Company of East Berlin, Connecticut, fabricated and erected it around 1890 for the Western Plank Road Company at Black Brook in Clinton County. In 1925 the bridge was judged obsolete there and was moved to Keene to replace a span washed away in a flood, where it sat on newly built abutments set above the river's torrents. It carried traffic to Dr. Ray Road, serving remaining residences once linked to farms, mines, forges and a sawmill, until the county closed it to vehicles in 1990. Today it is open to pedestrians only. Its importance lies in its rarity, as only about 50 lenticular truss bridges are known to survive nationwide, and in its example of bridge reuse.","period_of_significance":"1840-1948","architect_builder":"Berlin Iron Bridge Company","architectural_style":"Lenticular Metal Through Truss Bridge","criteria":["A","C"],"status_note":"Closed to vehicles in 1990 and now used for pedestrians only; no plans to rehabilitate or remove it. The form says it retains a substantial degree of integrity.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:50.554231-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/99001326.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/99001326/3b596ea50a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/99001326/3b596ea50a-1600.webp","licence":"CC BY-SA 3.0","author":"Mwanner","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Walton_Bridge_Keene_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:Walton_Bridge_Keene_New_York.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75312896","wikipedia":"https://en.wikipedia.org/wiki/Walton_Bridge_(Keene,_New_York)","wikidata":"https://www.wikidata.org/wiki/Q7966722"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/essex-county/walton-bridge-99001326/"}