Home > California > Ramona vicinity > Black Canyon Road Bridge, Spanning Santa Ysabel Creek at intersection of Bla, Ramona, San Diego County, CA
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Item Title
Black Canyon Road Bridge, Spanning Santa Ysabel Creek at intersection of Bla, Ramona, San Diego County, CA
LocationSpanning Santa Ysabel Creek at intersection of Bla,
Ramona vicinity, CA
Find maps of Ramona, CA
Created/Published
Documentation compiled after 1968.
Notes
Survey number HAER CA-264
Building/structure dates:
1913 initial construction
Significance: The Black Canyon Road Bridge is a concrete arch bridge that exemplifies the technological innovation known as the Thomas Three-Hinge System. The bridge is one of only three existing examples designed by William Thomas in California. It is remarkably unaltered and its original setting is still intact. The bridge was determined eligible for the National Register of Historic Places during a 1987 California Historic Bridges Survey by the California Department of Transportation.
Related Names
Thomas, William
Dewey, William B., Photographer
Dolan, Christy, Historian
Allen, Rebecca, Historian
Collection
Historic American Engineering Record (Library of Congress)
Contents
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