{"nrhp_refnum":"86000734","name":"Five Mile Drive-Sutter Creek Bridge","other_names":[],"category":"structure","location":{"address":"Five Mile Drive","address_restricted":false,"city":"Ione","county":"Amador County","state":"CA","lat":38.35381167600008,"lon":-120.95848446399998,"geom_source":"nps_gis"},"listed_date":"1986-04-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["local"],"summary":{"what_it_is":"A steel pin-connected pony Pratt half-hip truss bridge carrying Five Mile Drive over Sutter Creek near Ione, Amador County, California. It was built in 1910 by the Berkeley Steel Company and is owned by the County of Amador.","why_significant":"The nomination argues the bridge is significant for its age, rarity, unusual size for its truss type and unusual design features. Only one other bridge in Amador County is older. Pratt half-hip trusses were uncommon in northern California, and few survive. It was also designed by a local blacksmith and mining engineer, V.F. Garbarini.","narrative":"Spanning Sutter Creek in a wooded, rural setting near Ione, this 115-foot steel bridge carries Five Mile Drive on concrete abutments with flared wing walls. Built in 1910 by the Berkeley Steel Company for $3,700, it is a pin-connected pony Pratt half-hip truss, a type usually reserved for short spans and light traffic. Its length, the floor beams extended five feet beyond the truss chords, and end posts set higher than the interior verticals give it a distinctive \"sway-backed\" roadway profile. V.F. Garbarini, a local blacksmith and mining engineer who later became a county supervisor, designed it. Only one other bridge in Amador County is older, and surviving half-hip trusses are rare in northern California because many light examples were replaced long ago. Cross bracing added after a 1960 inspection is the main change, though the bridge has deteriorated and now carries a six-ton load limit.","period_of_significance":"1900-","architect_builder":"V.F. Garbarini - Designer; built by the Berkeley Steel Company","architectural_style":"Pony Pratt half-hip truss bridge","criteria":[],"status_note":"Condition is rated fair. It has been altered by added upper chord cross bracing and replaced stringers and decking. Load limits were imposed in 1960 and 1981 (six tons), and the current inspection shows its condition substantially unchanged.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:26.901785-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/86000734.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858395","wikipedia":"https://en.wikipedia.org/wiki/Five_Mile_Drive-Sutter_Creek_Bridge","wikidata":"https://www.wikidata.org/wiki/Q85761161"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/amador-county/five-mile-drive-sutter-creek-bridge-86000734/"}