{"nrhp_refnum":"86000307","name":"Walhounding Canal Lock No. 9","other_names":["Gamble's Lock"],"category":"structure","location":{"address":"OH 715","address_restricted":false,"city":"Warsaw","county":"Coshocton County","state":"OH","lat":40.34574879300007,"lon":-82.0763654732823,"geom_source":"nps_gis"},"listed_date":"1986-02-24","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Transportation","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A 1,790-foot segment of the Walhonding Canal right-of-way, including Lock No. 9 (Gamble's Lock), near Warsaw, Coshocton County, Ohio, on federal land administered by the U.S. Army Corps of Engineers. The canal was built between 1836 and 1842.","why_significant":"The nomination argues the canal represents state-of-the-art engineering meant to boost commerce, agriculture and transportation in early 19th century Ohio. Gamble's Lock, with a nine-foot lift, was the biggest and best preserved lock on the upper canal, and shows excellent design, craftsmanship and stonework. The canal channel at both ends of the lock is deep, wide and well preserved.","narrative":"Gamble's Lock, officially Lock No. 9, is part of a 1,790-foot stretch of the Walhonding Canal near Warsaw, Ohio. The canal was started in 1836 and finished in 1842 as a 25-mile feeder to the Ohio-Erie Canal, with 12 locks, running from Rochester to Roscoe. The lock was named for landowner Charles Gamble. Its chamber measures 90 feet by 15 feet and is built of large, hand-dressed sandstone blocks, with a nine-foot lift and walls thinner than on the main canal. A bypass at the northeast corner kept water flowing evenly. The wooden gates are gone, some cap stones were removed, and a concrete floor was added when the chamber served as a grain silo. The wooded canal and towpath remain intact on federal land. The lock was listed for its engineering, craftsmanship and stonework, and as the biggest and best preserved lock on the upper canal, a surviving piece of local commerce and transportation.","period_of_significance":"1836 - 1842","architect_builder":null,"architectural_style":null,"criteria":["A","C"],"status_note":"Described as in excellent condition. The segment is wooded and intact. The lock's wooden gates have been removed, some cap stones are missing, and a concrete floor was added when it served as a grain silo.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:14.838962-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/86000307.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71987281","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/coshocton-county/walhounding-canal-lock-no-9-86000307/"}