{"nrhp_refnum":"05001397","name":"Seneca River Crossing Canals Historic District","other_names":[],"category":"district","location":{"address":"Off NY 90","address_restricted":false,"city":"Montezuma and Tyre","county":"Cayuga County","state":"NY","lat":43.00919837100005,"lon":-76.70799673757418,"geom_source":"nps_gis"},"listed_date":"2005-12-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Engineering","Commerce"],"significance_levels":["national"],"summary":{"what_it_is":"A canal historic district of about 70 acres in Montezuma (Cayuga County) and Tyre (Seneca County), New York, containing remains of the original Erie Canal, the Enlarged Erie Canal, the Cayuga & Seneca Canal and the Richmond (Montezuma) Aqueduct over the Seneca River, built 1817-1857.","why_significant":"The nomination argues the district is an outstanding example of nineteenth-century canal engineering and an important part of the New York State canal system. The Richmond Aqueduct, designed by engineer Van Rensselaer Richmond and opened in 1857, is the centerpiece. Surviving features include a rare change bridge abutment, remnants of Clinton's Ditch with its mule bridge piers, and a drydock. It is listed under Criteria A and C.","narrative":"Remnants of three New York canals meet along the Seneca River near Montezuma and Tyre. The district covers more than a mile of the Enlarged Erie Canal, pieces of the original 1817-1825 Erie Canal known as Clinton's Ditch, and a short stretch of the Cayuga & Seneca Canal. Its centerpiece is the Richmond Aqueduct, designed by state engineer Van Rensselaer Richmond and opened in 1857 with 31 limestone arches carrying the canal over the river. When the Barge Canal used this stretch of the Seneca River, the aqueduct's center was removed, leaving nine arches. Other features include a drydock, a stone culvert, Locks 62 and 11, wooden piers from an early mule bridge, and a rare change bridge abutment. The canal was raised and rerouted here to lift it above the swampy Cayuga Marshes. The district was listed for its transportation and engineering importance and for its fine stone construction.","period_of_significance":"1817-1917","architect_builder":"Van Rensselaer Richmond, Engineer","architectural_style":null,"criteria":["A","C"],"status_note":"Canals abandoned after the Barge Canal opened in the early twentieth century; remains are overgrown but visible. Only nine of the aqueduct's 31 arches survive. A towpath trail of about one mile is open on the Montezuma side, and a historic park is planned.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:53.745469-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/05001397.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/05001397/8595f29f73-800.webp","url_1600":"https://nationalhistoricalregister.com/media/05001397/8595f29f73-1600.webp","licence":"CC BY-SA 4.0","author":"Magicpiano","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:MontezumaNY_1820sErieCanalDitch.jpg\" rel=\"noopener\">Magicpiano</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:MontezumaNY_1820sErieCanalDitch.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75316731","wikipedia":"https://en.wikipedia.org/wiki/Seneca_River_Crossing_Canals_Historic_District","wikidata":"https://www.wikidata.org/wiki/Q7450335"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/cayuga-county/seneca-river-crossing-canals-historic-district-05001397/"}