{"nrhp_refnum":"100002843","name":"Fort Miami","other_names":["Fort Hill"],"category":"site","location":{"address":"Brower Rd.","address_restricted":false,"city":"Elizabethtown","county":"Hamilton County","state":"OH","lat":null,"lon":null,"geom_source":null},"listed_date":"1971-09-24","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Archeology","Historic - Aboriginal"],"significance_levels":["state"],"summary":{"what_it_is":"Fort Miami (also called Fort Hill) is a prehistoric earthwork enclosure on a high bluff at the confluence of the Great Miami and Ohio Rivers, near Elizabethtown in Miami Township, Hamilton County, Ohio, within Shawnee Park.","why_significant":"The nomination presents the fort as an outstanding Hopewell-era earthwork with two concentric horseshoe-shaped walls. Excavations since 1965 found that every developmental stage of prehistoric culture occupied the bluff, and a radiocarbon date of 270 A.D. suggests Hopewell construction. The interior has never been cultivated and remains close to original condition.","narrative":"Fort Miami, also known as Fort Hill, is a prehistoric earthwork on a high bluff where the Great Miami River meets the Ohio River in Hamilton County, Ohio. Two concentric horseshoe-shaped walls, with ends that nearly meet to form gateways, enclose the bluff top. The embankments rise about 10 to 15 feet. The site has been known since the late 1700s and was described by William Henry Harrison in 1839, mapped by Squier and Davis in the 1840s, and tested by Warren K. Moorehead in 1890. University of Cincinnati archaeologists have excavated there since 1965, working in the walls, a mound, test pits and village areas. Their findings show that every developmental stage occupied the bluff, and a radiocarbon date of 270 A.D. points to construction by the Hopewell people. The interior has never been cultivated and remains close to its original condition. The site lies in a public park and offers views of both rivers.","period_of_significance":"ca 300 B.C.-500 A.D.","architect_builder":"Hopewell people (suggested by radiocarbon date)","architectural_style":null,"criteria":[],"status_note":"Listed as in excellent condition and altered; used as a park, with walls nearly perfect except where eroded. Ownership later transferred to the Hamilton County Park District.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:09.247087-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_LATE/100002843.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/hamilton-county/fort-miami-100002843/"}