Crystal Springs Dam

The Lower Crystal Springs Dam on the San Mateo Creek in San Mateo County, California, formed the lake of the same name.

The gravity dam was 30 km away from San Francisco built a few hundred meters from the San Andreas Fault away. It survived the severe shocks of the San Francisco earthquake of 1906 and the Loma Prieta earthquake in 1989 without damage. The curved wall is composed of interlocked concrete blocks, and in strong seismic loading is briefly some of the joints can open. As the construction of this wall was finished in 1890, she was with her ​​former height of 44.5 m in the western world, the largest dam after dam Kurit in Persia - until the construction of the New Croton Dam in 1906 with 91 m height. The wall was built in 1911 increased from 44.5 m to 57 m. A dam with a similar amount was otherwise only the Tibi Dam in Spain with about 42 to 46 m.

About the dam, a road that belongs to the Sawyer Camp Trail.