{"nrhp_refnum":"78003040","name":"Nokesville Truss Bridge","other_names":[],"category":"structure","location":{"address":"NE of Nokesville on VA 646","address_restricted":false,"city":"Nokesville","county":"Prince William County","state":"VA","lat":38.707229496000025,"lon":-77.56422084399998,"geom_source":"nps_gis"},"listed_date":"1978-04-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A single-span wrought iron Pratt through truss bridge carrying Virginia Route 646 (Aden Road) over the Southern Railway tracks at Nokesville, Prince William County, Virginia, built in 1882.","why_significant":"The bridge was built by the Keystone Bridge Company of Pittsburgh, described as a pioneer in truss technology and one of the most important bridge companies in the United States in the 19th century. It is regarded as an excellent example of a wrought iron truss. It scored 21.0 of a possible 27.0 points under the Research Council's significance criteria.","narrative":"Carrying Route 646, known as Aden Road, over the Southern Railway tracks at Nokesville in Prince William County, this bridge is a single-span wrought iron Pratt through truss. It was built in 1882 by the Keystone Bridge Company of Pittsburgh. The span measures just under 74 feet. Its top chords and end posts are made of two upright channels joined by lacing bars, and the vertical posts use the same channel-and-lacing arrangement. The substructure is concrete with timber seats. The bridge is recorded as unaltered and in excellent condition on its original site. It was recognized because Keystone was a pioneer in truss technology and among the most important bridge builders in the United States in the nineteenth century. The bridge was also surveyed as part of a Virginia study of metal truss bridges built between 1865 and 1932. Using the Research Council's 1977 criteria, it scored 21.0 out of a possible 27.0 points, and it is considered significant at the state level.","period_of_significance":"1882","architect_builder":"Keystone Bridge Company","architectural_style":"Pratt through truss","criteria":[],"status_note":"Listed as in excellent condition and unaltered, on its original site.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:57.786473-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/51/6827/41682751/content/electronic-records/rg-079/NPS_VA/78003040.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78003040/eb61baac2f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78003040/eb61baac2f-1600.webp","licence":"CC BY-SA 3.0","author":"Jerrye &amp; Roy Klotz, MD","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:NOKESVILLE_TRUSS_BRIDGE,_PRINCE_WILLIAM_COUNTY.JPG\" rel=\"noopener\">Jerrye &amp;amp; Roy Klotz, MD</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:NOKESVILLE_TRUSS_BRIDGE,_PRINCE_WILLIAM_COUNTY.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/41682751","wikipedia":"https://en.wikipedia.org/wiki/Nokesville_Truss_Bridge","wikidata":"https://www.wikidata.org/wiki/Q15262441"},"indexable":true,"url":"https://nationalhistoricalregister.com/virginia/prince-william-county/nokesville-truss-bridge-78003040/"}