The majority of California is still in the abnormally dry range, with about 20% of California in severe drought.
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California is home to about 1,400 dams – including the fifth-tallest dam in the United States – and nearly as many man-made reservoirs. As one of the most drought-stricken states in the country,
Californiarelies heavily on its dams for its water supply, irrigation, flood control, water quality and energy. The state's tallest dams meet or exceed 550 feet in height
5 Largest Dams in California
Do you really think that there is that many places that they can put a dam? You have to have adequate rock to anchor the dam.
The St. Francis Dam was a curved
concrete gravity dam, built to create a large regulating and storage
reservoir for the
city of Los Angeles, California. The reservoir was an integral part of the city's
Los Angeles Aqueduct water supply infrastructure. 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.
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 direction of its General Manager and Chief Engineer,
William Mulholland.
At 11:57 p.m. on March 12, 1928, the dam catastrophically failed, and the resulting
flood took the lives of at least an estimated 431 people.
[2][3] The collapse of the St. Francis Dam is considered to be one of the worst American civil engineering disasters 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.
[4]
The committee ended their report with, "...having examined all the evidence which it has been able to obtain to date reports its conclusions as follows:
- The type and dimensions of the dam were amply sufficient if based on suitable foundation.
- The concrete of which the dam was built was of ample strength to resist the stresses to which it would normally be subjected.
- The failure cannot be laid to movement of the earth's crust.
- The dam failed as a result of defective foundations.
- This failure reflects in no way the stability of a well designed gravity dam properly founded on suitable bedrock."[53]
St. Francis Dam - Wikipedia
You just cannot throw up a dam where ever you find running water. California learned this the hard way.