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St. Francis Dam

1928 disasters in the United States1928 in California1928 industrial disasters2019 establishments in CaliforniaBurials at Ivy Lawn Cemetery
Burials in Ventura County, CaliforniaCalifornia Historical LandmarksDam failures in the United StatesDams completed in 1926Dams in Los Angeles County, CaliforniaDisasters in Los AngelesFloods in the United StatesHistory of Los AngelesHistory of Los Angeles County, CaliforniaHistory of Ventura County, CaliforniaLos Angeles AqueductMarch 1928 eventsNational Memorials of the United StatesProtected areas established in 2019Reservoirs in CaliforniaSanta Clara River (California)Santa Clarita, CaliforniaSanta Paula, CaliforniaSierra Pelona RidgeUnited States Forest Service National MonumentsUse mdy dates from July 2019
St Francis Dam crop
St Francis Dam crop

The St. Francis Dam was a concrete gravity dam located in San Francisquito Canyon in northern Los Angeles County, California that was built between 1924 and 1926 to serve the city of Los Angeles's growing water needs. It failed catastrophically in 1928 due to a defective soil foundation and design flaws, unleashing a flood that claimed the lives of at least 431 people. The collapse of the dam is considered to have been one of the worst American civil engineering disasters of the 20th century, and remains the 3rd-greatest loss of life in California's history, exceeded only by the 1906 San Francisco earthquake and fire and the Great Flood of 1862.The St. Francis Dam was built to create a large regulating and storage reservoir that was an integral part of the Los Angeles Aqueduct. It was located in San Francisquito Canyon of the Sierra Pelona Mountains, about 40 miles (64 km) northwest of downtown Los Angeles, and approximately 10 miles (16 km) north of the present day city of Santa Clarita, California. The dam was designed and built by the Los Angeles Department of Water and Power, then named the Bureau of Water Works and Supply. The department was under the direction of its general manager and chief engineer, William Mulholland. The disaster ended Mulholland's career.

Excerpt from the Wikipedia article St. Francis Dam (License: CC BY-SA 3.0, Authors, Images).

St. Francis Dam
Forest Route 5N27,

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N 34.546944444444 ° E -118.5125 °
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St. Francis Dam

Forest Route 5N27

California, United States
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