{"nrhp_refnum":"79000291","name":"Lock No. 38 and Spillway","other_names":["12 Mile Lock","See Also:Ohio and Erie Canal"],"category":"structure","location":{"address":"Hillside Rd.","address_restricted":false,"city":"Valley View","county":"Cuyahoga County","state":"OH","lat":41.37223831000006,"lon":-81.64866505799995,"geom_source":"nps_gis"},"listed_date":"1979-12-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Engineering","Transportation","Exploration/Settlement"],"significance_levels":["state"],"summary":{"what_it_is":"Lock No. 38, known as the \"12 Mile Lock,\" and its spillway on the Ohio & Erie Canal at Hillside Road in Valley View, Cuyahoga County, Ohio. The lock was built between 1825 and 1827.","why_significant":"The nomination calls it one of the three best preserved locks on the Ohio and Erie Canal between Akron and Cleveland. The canal still holds water here, both lock gates are intact, and a reputed lock tender's house and inn is nearby. Together these features show a working canal from a period when canals were essential to Ohio's growth.","narrative":"Lock No. 38, called the \"12 Mile Lock,\" is a canal lock and spillway on the Ohio & Erie Canal beside Hillside Road in Valley View, Cuyahoga County. It was built between 1825 and 1827 and is owned by the State of Ohio. The lock is a standard mitered-gate type with a chamber 90 feet long and 15 feet wide. Its cut stone construction is masked by a layer of concrete, applied around 1905 as a stop-gap repair. Both gates remain intact. It is regarded as one of the three best preserved locks on the canal between Akron and Cleveland. Water still fills the canal at this point, and a reputed lock tender's house and inn stands nearby, giving the scene the look of a working canal. The setting is a rural valley, and the towpath is frequently used by hikers. These features illustrate how canals served Ohio's growth.","period_of_significance":"1825-1827","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Listed as in very good condition; the canal contains water and the towpath is used by hikers for recreation. The concrete cover on the lock was applied c. 1905 as a repair.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:12.155917-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/79000291.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71984700","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/cuyahoga-county/lock-no-38-and-spillway-79000291/"}