|December 2009 (36.96297 Degrees, -122.02510 Degrees) West Cliff Drive OH|
Today's bridge was built in 1918 with a timber trestle substructure and a Howe pony truss superstructure. In 2000 it was strengthened with steel I girders supporting the main span (see photo below). Between the trusses is a single lane road and on the outside are walkways supported by corbels extending out from the floor beams.
The bridge is 190 ft long with a 62 ft long truss span. The bridge is in 'Good' condition with a sufficiency rating of 93 and it carries about 500 vehicles a day. 'Historic Highway Bridges of California' states that this bridge was built by the Southern Pacific as a grade separation over its track. They continue '..It is the only Howe Truss on a California Highway" although this one lane road hardly qualifies as a highway. Perhaps because of the extensive alterations it is not registered as a historic place.
The Santa Cruz County Public Libraries Site states that 'the West Cliff Drive Howe Truss Bridge is the last of its kind in the state highway system. It stands where the county's first wagon bridge was constructed. The original bridge was built by town founder Elihu Anthony in 1849, so loaded wagons could climb the bluff to use his wharf at the end of Bay Street. This was reached from Washington and Second streets. In 1876, railroad tracks were built going under the bridge. Then in 1918, Southern Pacific moved the bridge's north entrance to a one-lane driveway on Blackburn Terrace, into which two lanes were later squeezed. The span was replaced with a Howe truss bridge (from the 1840 patent, which introduced wrought iron into what had been primarily a timber design.'
Santa Cruz County, California Bridges: West Cliff Drive Overhead across the Southern Pacific Railroad by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Post a Comment