{"nrhp_refnum":"76001456","name":"Lynchburg Covered Bridge","other_names":[],"category":"structure","location":{"address":"East Fork of Little Miami River","address_restricted":false,"city":"Lynchburg","county":"Clinton County","state":"OH","lat":39.24507156900006,"lon":-83.79443239199998,"geom_source":"nps_gis"},"listed_date":"1976-03-16","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A one-span wooden Long truss covered bridge crossing the east fork of the Little Miami River at Lynchburg, Ohio, on the Clinton-Highland County line. It was built in 1870 by John C. Gregg of Hillsboro.","why_significant":"The bridge is one of only eight Long trusses left in Ohio, one of only three covered bridges in the Highland-Clinton County area, and the state's only inter-county covered bridge. It is also one of the few remaining village bridges in Ohio. The Long truss was patented in 1830 and is considered the first panel truss into which mathematical calculations entered.","narrative":"Spanning the east fork of the Little Miami River at Lynchburg, this wooden covered bridge carries the Clinton-Highland County line through its middle. John C. Gregg of Hillsboro, a well-known local bridge builder, completed it in 1870 at a cost of $3,138.66, with the two counties sharing construction and maintenance costs equally. It is a ten-panel Long truss, 120 feet long overall, with vertical board siding, straight portals and cut-stone abutments. The Long truss, patented in 1830 by Col. Stephen H. Long, was considered the first panel truss to use mathematical calculations. Only eight Long trusses remain in Ohio, and this is the state's only inter-county covered bridge. A new steel bridge bypassed it in 1969, prompting residents to form a preservation society. A February 1974 windstorm stripped much of the roof and some siding, and the bridge was closed to all traffic, though its trusses still seemed sturdy and straight.","period_of_significance":"1870","architect_builder":"John C. Gregg","architectural_style":null,"criteria":[],"status_note":"Damaged by a windstorm in February 1974 that tore off much of the roof and some siding; trusses appeared sturdy and the bridge was closed to all traffic pending repairs, which had not been made.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:09.391687-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/76001456.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76001456/e9e38a89fb-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76001456/e9e38a89fb-1600.webp","licence":"CC BY 2.0","author":"dok1","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Lynchburg_Covered_Bridge.jpg\" rel=\"noopener\">dok1</a>, <a href=\"https://creativecommons.org/licenses/by/2.0\" rel=\"license noopener\">CC BY 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Lynchburg_Covered_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71987188","wikipedia":"https://en.wikipedia.org/wiki/Lynchburg_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q6708472"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/clinton-county/lynchburg-covered-bridge-76001456/"}