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St. Francis Dam Disaster. Los Angeles County, California, USA. (12 March 1928) 

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Old 09-09-2012, 11:42 AM
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St. Francis Dam Disaster. Los Angeles County, California, USA. (12 March 1928)

for more threads like this one : http://www.documentingreality.com/fo...me-line-45276/

Colorized historic images by Pony R. Horton.


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The St. Francis Dam was a curved concrete gravity dam, designed to create a reservoir as a storage point of the Los Angeles Aqueduct. It was located in San Francisquito Canyon, about 40 miles (64km) northwest of Los Angeles, California, approximately 10 miles (16km) north of the city of Santa Clarita. The name "St. Francis" is an anglicized version of the name of the canyon.

The dam was designed and built between 1924 and 1926 by the Los Angeles Department of Water and Power, then named the Bureau of Water Works and Supply. The department was under the supervision of the city's chief engineer William Mulholland.

At two and a half minutes before midnight on March 12, 1928 the dam failed catastrophically and the resulting flood killed up to 600 people. The collapse of the St. Francis Dam is considered to be one of the worst American civil engineering failures of the 20th century and remains the second-greatest loss of life in California's history, after the 1906 San Francisco Earthquake and fire. The disaster marked the end of Mulholland's career.

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Blocks of concrete weighing thousands of tons were carried in the floodwaters nearly a half mile downstream. The magnitude of the disaster is hard to comprehend. Normal rivers have trouble moving boulders only a foot across. Besides the sheer magnitude of the flow, debris from the landslide buoyed up the blocks. The block above was a half mile downstream. It measured approximately 63 feet long, 30 feet high, and 54 feet wide.



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base of the dam in 2009


source - wiki & google image search

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  #2  
Old 09-09-2012, 12:14 PM
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Re: St. Francis Dam Disaster. Los Angeles County, California, USA. (12 March 1928)

What a terrible tragedy, I had no idea it occured. Thanks for sharing these wonderful images

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Old 08-02-2013, 05:52 PM
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Re: St. Francis Dam Disaster. Los Angeles County, California, USA. (12 March 19

Terrible tragedy that is no doubt buried in the "history not to be told" files at schools

Thank you for posting

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