St. Francis Dam With Water
San Francisquito Canyon
[VIEW OF DAM][ZOOM IN][VIEW IN 2001]

St. Francis Dam (looking north), with water in the reservoir, sometime between the dam's completion in May 1926 and its failure on March 12, 1928.Construction on the 600-foot-long, 185-foot-high St. Francis Dam started in August 1924. With a 12.5 billion-gallon capacity, the reservoir began to fill with water on March 1, 1926. It was completed two months later.
At 11:57:30 p.m. on March 12, 1928, the dam failed, sending a 180-foot-high wall of water crashing down San Francisquito Canyon. An estimated 470 people lay dead by the time the floodwaters reached the Pacific Ocean south of Ventura 5½ hours later.
It was the second-worst disaster in California history, after the great San Francisco earthquake and fire of 1906, in terms of lives lost and America's worst civil engineering failure of the 20th Century.
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