Reservoir in San Francisquito Canyon that held 12.5 billion gallons of water for the Los Angeles Department of Water and Power — seen here just after the collapse of the St. Francis Dam on March 12-13, 1928.
Stereoscopic view on glass plate negatives. In Keystone-Mast Collection at U.C. Riverside.
According to St. Francis Dam historian J. David Rogers (2015 PC), this photograph was shot at least a year after the dam break.
Below: Comparison by Jason Brice using Google Earth, 2015. According to Brice, the camera would be located
along the Bee Highline Road about 1,000 feet north of the dam. He says the distant peaks in the original photo are Jupiter Mountain and Jupiter Mountain West.
Click image to enlarge.