{"nrhp_refnum":"71000168","name":"Bridgeport Covered Bridge","other_names":[],"category":"structure","location":{"address":"SW of French Corral over S. Yuba River","address_restricted":false,"city":"French Corral","county":"Nevada County","state":"CA","lat":39.283519804000036,"lon":-121.19541709281373,"geom_source":"nps_gis"},"listed_date":"1971-07-14","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation","Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A wooden covered bridge crossing the South Fork of the Yuba River on the county road between Smartsville and French Corral, about 3 miles west of French Corral, Nevada County, California. It was built in 1862 by David Ingerfield Wood.","why_significant":"The nomination cites the bridge's engineering, architecture and transportation importance. It is described as the longest covered bridge in the west and the longest single-span covered bridge in the U.S. It was part of the old turnpike serving Nevada City, North San Juan and the Malakoff Mines, and is the only structure left reminiscent of Old Bridgeport.","narrative":"Spanning the South Fork of the Yuba River on the county road between Smartsville and French Corral, this wooden covered bridge was built in 1862 by David Ingerfield Wood using local Douglas fir. Its clear span is roughly 235 feet, and the roadway is about 16 feet wide with plank decking. Massive granite blocks form the abutments. The main span uses a Howe Truss reinforced with an arch made of paired 5 by 14 inch timbers, with iron used for vertical tension rods, bearing shoes and bolts. Shakes cover the sides and roof. The bridge is described as the longest covered bridge in the west and the longest single-span covered bridge in the United States. It was part of the old turnpike that served Nevada City, North San Juan and the Malakoff Mines, and it is the only structure left reminiscent of the former settlement of Bridgeport. The bridge needs repair but remains in use and structurally strong.","period_of_significance":"1862","architect_builder":"David Ingerfield Wood (also given as David L. Wood in the significance statement)","architectural_style":"Wooden combination truss and arch construction (Howe Truss with auxiliary arch and counter struts)","criteria":[],"status_note":"Listed in fair condition, unaltered and on its original site. It needs repair but is still in use and structurally strong.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.592538-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/71000168.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/71000168/550e5fba4d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/71000168/550e5fba4d-1600.webp","licence":"CC BY-SA 4.0","author":"Frank Schulenburg","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridgeport_Covered_Bridge_(2025)-L1006843.jpg\" rel=\"noopener\">Frank Schulenburg</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridgeport_Covered_Bridge_(2025)-L1006843.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123860122","wikipedia":"https://en.wikipedia.org/wiki/Bridgeport_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q4966585"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/nevada-county/bridgeport-covered-bridge-71000168/"}