San Mateo County, California Bridges: Devil's Slide Bridges across Shamrock Ranch Valley by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
State Route 1 provides access to the headlands and beaches along the Pacific Coast at considerable cost to the state of California. The slow process of erosion is accelerated along the coast and SR 1 requires considerable resources to keep open. The Devil's Slide just south of San Francisco was deteriorating so rapidly that Caltrans eventually drilled a tunnel through the headlands to avoid it. Caltrans' engineer Kevin Harper designed the two handsome arch bridges that cross the valley at Shamrock Ranch on the north side of the tunnel (Pat Hipley and I designed the retaining wall along the entrance to the tunnel).
|July 2014 (37.58397 Degrees, -122.50911 Degrees) Devil's Slide Bridge