{"nrhp_refnum":"04000434","name":"Enlarged Erie Canal Historic District (Discontiguous)","other_names":[],"category":"district","location":{"address":"City of Cohoes, roughly from S to NW city boundary","address_restricted":false,"city":"Cohoes","county":"Albany County","state":"NY","lat":42.777295421000076,"lon":-73.70327290299406,"geom_source":"nps_gis"},"listed_date":"2004-05-14","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Engineering","Commerce"],"significance_levels":["national"],"summary":{"what_it_is":"A linear, discontiguous historic district in the City of Cohoes, Albany County, New York, made up of surviving parts of the Enlarged Erie Canal between historic Locks 9 and 18. It has five numbered units and contains locks, berm and retaining walls, towpath, prism and a culvert.","why_significant":"The nomination argues the district is significant under Criteria A and C in the areas of transportation, engineering and commerce. It preserves the alignment and engineering of the canal enlarged between 1836 and 1862, which replaced the original single-chamber locks with larger double-chamber locks. Unit 3, with Locks 14 and 15, is described as the most intact and evocative stretch within Cohoes.","narrative":"Running through the City of Cohoes, this discontiguous district preserves pieces of the Enlarged Erie Canal, the widened and deepened version of the original canal built between 1836 and 1862. Five numbered units each center on surviving locks between historic Locks 9 and 18, along with berm walls, towpath, prism and a buried stone culvert. Lock 9 and Locks 14, 15 and 17 keep chamber walls and center piers built of coursed limestone ashlar. Other locks are reduced, buried beneath streets or buildings, or incorporated into later structures such as a 1966 firehouse. The canal replaced single-chamber locks with larger double-chamber locks, and engineers including Holmes Hutchinson, John Jervis and William McAlpine shaped the work in this area. The district was recognized for its role in transportation, engineering and commerce, and for the way its surviving features allow the canal's route through the city to be followed.","period_of_significance":"c. 1836-c. 1917","architect_builder":"Contractors for locks 17 and 18: Merriam, Carr & Co; Barker & Smith.","architectural_style":null,"criteria":["A","C"],"status_note":"Condition varies by unit. Locks 9, 14, 15, 17 and 18 are largely intact. Lock 10 is reduced to remnants. Locks 11, 12, 13 and 16 are buried or built over, and their condition is undetermined. Some canal sections have been filled, and towpath sections were altered with paving blocks in the 1970s.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.986558-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/04000434.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/04000434/ef00e76b5f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/04000434/ef00e76b5f-1600.webp","licence":"CC BY-SA 3.0","author":"Tsf01","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Enlarged_Erie_Canal_Lock_15.jpg\" rel=\"noopener\">Tsf01</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:Enlarged_Erie_Canal_Lock_15.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75316221","wikipedia":"https://en.wikipedia.org/wiki/Enlarged_Erie_Canal_Historic_District","wikidata":"https://www.wikidata.org/wiki/Q5379050"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/albany-county/enlarged-erie-canal-historic-district-discontiguous-04000434/"}