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Black Canyon Road Bridge, Spanning Santa Ysabel Creek at intersection of Black Canyon & Sutherland Dam Roads, Ramona, San Diego County, CA
Summary
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.
Survey number: HAER CA-264
Building/structure dates: 1913 Initial Construction
Tags
Date
1969 - 1980
Contributors
Historic American Engineering Record, creator
Thomas, William
Dewey, William B, photographer
Dolan, Christy, historian
Allen, Rebecca, historian
Location
Ramona, 33.04136, -116.87926
Source
Christie's
Copyright info
No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. http://www.loc.gov/rr/print/res/114_habs.html
