{"nrhp_refnum":"79000253","name":"Redwood Highway","other_names":["California State Highway #1"],"category":"structure","location":{"address":"W of Klamath","address_restricted":false,"city":"Klamath","county":"Del Norte County","state":"CA","lat":41.58812215450004,"lon":-124.1058986971188,"geom_source":"nps_gis"},"listed_date":"1979-12-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"Two abandoned sections of the original Redwood Highway (California State Highway #1) in Del Norte County, California, near Klamath and Crescent City. The road was built 1919-1923 by the California State Highway Commission and runs through Redwood National Park and Del Norte Coast Redwoods State Park.","why_significant":"The nomination argues the sections are locally significant in engineering and transportation as surviving examples of a 1920s highway, little changed because they were bypassed while other stretches were modernized and widened. They are also original parts of the first state highway built in Del Norte and Humboldt Counties, which opened the area to settlement, resource development and visitors to the redwoods.","narrative":"Two bypassed stretches of the original Redwood Highway survive in Del Norte County, California. One runs from High Bluff to the mouth of the Klamath River, where a ferry once carried cars to Requa. The other, about three miles long, begins north of Wilson Creek and follows the coastal cliffs toward Enderts Beach. The highway was built between 1919 and 1923 by the California State Highway Commission and was the first state highway built in Del Norte and Humboldt Counties. Before it, the area depended on ships and poorly maintained wagon roads. Slides, erosion and the 1926 opening of the Douglas Memorial Bridge led to relocations that left these sections largely unaltered. Paving is now broken or missing and slipouts block the way, but the grade and construction details can still be seen. The nomination presents them as the clearest surviving examples of a 1920s highway in the region, and notes that the highway's builders spared most redwoods along the route.","period_of_significance":"1919-1923","architect_builder":"California State Highway Commission","architectural_style":null,"criteria":[],"status_note":"Both sections are abandoned and deteriorated: paving is broken or missing, slides and washouts block the grade, and the road cannot be traversed entirely on foot, though original engineering details remain visible.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.618662-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/79000253.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858595","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q47546166"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/del-norte-county/redwood-highway-79000253/"}