{"nrhp_refnum":"74000345","name":"Ohio and Erie Canal Deep Lock","other_names":[],"category":"structure","location":{"address":"S of Peninsula on Riverview Rd.","address_restricted":false,"city":"Peninsula","county":"Summit County","state":"OH","lat":41.23289633300004,"lon":-81.55241687499995,"geom_source":"nps_gis"},"listed_date":"1974-09-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A stone masonry canal lock on the Ohio and Erie Canal, located south of Peninsula on Riverview Road in Boston Township, Summit County, Ohio. The canal section it belongs to was built in the 1820s, with the Akron-Cleveland line opened in 1827.","why_significant":"The lock is the deepest on the Akron-Cleveland chain of the Ohio and Erie Canal and was known as Lock 28, or Deep Lock. It represents the canal system's contribution to Ohio and national transportation history, particularly in the 1830s and 1840s. The nomination rates it as locally significant.","narrative":"Deep Lock is a stone masonry canal lock south of Peninsula in Boston Township, Summit County, Ohio. Its channel measures 90 feet long, 15 feet wide and 16 feet deep, formed by two parallel cut-stone walls joined at the south end by a low, slightly concave retaining wall. At the north end the walls flare outward to help boats approach, and the slots for the gate posts remain visible. Known as Lock 28 of the Akron-Cleveland section of the Ohio and Erie Canal, it is the deepest lock in that chain. The depth was dictated by the terrain, since 42 locks were needed over the 36 miles between Akron and Cleveland. The first boat reached Cleveland from Akron on July 4, 1827. The lock served a major transportation system in the 1830s and 1840s, but canal use declined after the Civil War and had largely ended by about 1900. Sections were faced with cement in 1907-1908, yet the original stonework remains in good condition.","period_of_significance":"19th Century; specific date 1827","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Described as in good condition and altered; parts of the sandstone walls were faced with cement in 1907-1908. The form lists it as publicly owned, unoccupied, with a park use and unrestricted public access. The canal itself was abandoned.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:09.220807-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/74000345.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71991631","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/summit-county/ohio-and-erie-canal-deep-lock-74000345/"}