San Francisquito Canyon
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San Francisquito Canyon is a canyon created through erosion of the Sierra Pelona Mountains by the San Francisquito Creek, in Los Angeles County, Southern California.
San Francisquito Canyon is home to low-lying shrubs, dry grasses, and towering yucca that bloom during the spring.
Miners operating a hydraulic sluice at San Francisquito Canyon (c. 1890–1900).
Water held in a reservoir behind the St. Francis Dam in early 1927.
Looking upstream toward Green Valley from the St. Francis Dam ruins.
St. Francis Dam
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The St. Francis Dam, or the San Francisquito Dam, was a concrete gravity-arch dam located in San Francisquito Canyon in northern Los Angeles County, California, United States, that was built between 1
San Francisquito Canyon
…mining later occurred in the canyon into at least the late 19th century. Between 1924 and 1926, the canyon was the site of the construction of the St. Francis Dam. The Los Angeles Department of Water and Power began filling a reservoir in the San Francisquito Canyon in 1926. At 11:57 pm on March 12, 1928, the dam…
St. Francis Dam in early 1928
The approximate extent of the reservoir created by the dam
The same view of the "Tombstone" post-collapse. The west (left) abutment was entirely swept away. The inactive San Francisquito Fault is clearly visible, being located along the contact zone of schist and conglomerate.