{"nrhp_refnum":"90001118","name":"Mark Road Bridge","other_names":[],"category":"structure","location":{"address":"Mark Rd. over Sugar Cr.","address_restricted":false,"city":"Staunton","county":"Fayette County","state":"OH","lat":39.48695106200006,"lon":-83.47286772799998,"geom_source":"nps_gis"},"listed_date":"1990-07-26","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["local"],"summary":{"what_it_is":"A 103-foot, single-span Pratt through truss bridge carrying Township Road 54 (Mark Road) over Sugar Creek near Staunton in southern Fayette County, Ohio. It was built in 1883 by the Wrought Iron Bridge Company of Canton, Ohio.","why_significant":"The bridge is significant under Criterion C in engineering as an example of the metal through-truss, the main highway bridge design in Ohio and the nation in the late nineteenth and early twentieth centuries. It also represents the work of the Wrought Iron Bridge Company, one of the largest bridge firms of its day. It is believed to be one of only two surviving Ohio examples of the firm's rural highway bridges from the 1880s.","narrative":"Mark Road Bridge is a 103-foot, single-span Pratt through truss that carries a township road over Sugar Creek in southern Fayette County, Ohio. The Wrought Iron Bridge Company of Canton built it in 1883, and cast-iron plates on the portals name the firm, the date, and the three county commissioners. The bridge has seven panels, pin connections, eyebar tension members, and a wooden floor. Its limestone abutments remain, though one wingwall has been capped with concrete and reinforced with steel piling. The bridge was listed for its engineering value. Pin-connected metal trusses were the most common highway bridge type of the 1880s, allowing parts to be mass-produced and quickly assembled by unskilled labor. The Canton firm was among Ohio's largest, and this bridge uses channel beams based on an 1876 patent by company founder David Hammond. Only a handful of such wrought-iron Pratt trusses survive in Ohio, and this is one of two known rural examples from the 1880s.","period_of_significance":"1883","architect_builder":"Wrought Iron Bridge Company","architectural_style":"Pratt through Truss","criteria":["C"],"status_note":"The form describes a bridge that retains a high degree of integrity despite alterations such as a concrete-capped wingwall and steel I-beam piling reinforcing an abutment. Its current function is listed as a road bridge.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:14.776371-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/90001118.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/90001118/9f01faa03f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/90001118/9f01faa03f-1600.webp","licence":"CC BY-SA 3.0","author":"Aesopposea","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Mark_Road_Bridge.JPG\" rel=\"noopener\">Aesopposea</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Mark_Road_Bridge.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71988283","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q137803379"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/fayette-county/mark-road-bridge-90001118/"}