Lower Blackburn Grade Bridge - California - U.S. National Register of Historic Places on Waymarking.com

The Lower Blackburn Grade Bridge is a reinforced concrete through arch. The main span is approximately 150 feet long while the overall structure length is 258 feet. The bridge features an ornate concrete through arch with inset panels along the arch.
The Lower Blackburn Grade Bridge was one of five bridges designed by John B. Leonard along the Fortuna-Red Bluff Highway (CA-36) from 1923 to 1925. The bridge was built as part of a highway realignment project under taken by Humboldt County. The highway had a treacherous grade known as Blackburn Grade in which dangerous curves, steep grades and natural hazards had taken many lives and caused a need for a realignment project.
The Lower Blackburn Grade Bridge was placed on the National Register on June 25, 1981 and was bypassed in 1985 by an adjacent reinforced concrete box girder bridge, which was dedicated to Silvio “Botchie” Santi an Italian immigrant who lived in the area.
More details of the bridge and its designer can be found at: (visit link)

Street address: NW of Bridgeville on CA 36 County / Borough / Parish: Humboldt Year listed: 1981 Historic (Areas of) Significance: Event, Architecture/Engineering Periods of significance: 1925 - 1949 Historic function: Transportation Current function: Transportation Privately owned?: no Primary Web Site: [Web Link] Secondary Website 1: [Web Link] Secondary Website 2: [Web Link] Season start / Season finish: Not listed Hours of operation: Not listed National Historic Landmark Link: Not listed

Visit Instructions:
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Recent Visits/Logs:

Date Logged Log User Rating   09/19/2013 Volcanoguy visited it