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Sunday, 7 September 2014


The earliest known dam was the Jawa Dam in Jordan, 62 miles northeast of the capital Amman. This gravity dam is dated to 3000 BC.

Construction ended on January 15, 1910 on the Buffalo Bill Dam (see below) in Wyoming, United States, which was the tallest dam in the world at the time, at 325 feet. It was named after the famous Wild West figure William "Buffalo Bill" Cody, who founded the nearby town of Cody and owned much of the land now covered by the reservoir formed by its construction.

The 1911 Sarez earthquake in eastern Tajikistan triggered a huge landslide, forming the tallest dam in the world at just under 2,000 feet.

Construction of the Hoover Dam on the Colorado River along the Arizona–Nevada border begun on July 7, 1930. Over the next five years, a total of 21,000 men would work to produce what would be the largest dam of its time, as well as one of the largest man-made structures in the world. It was dedicated on September 30, 1935.

Hoover Dam releasing water from the jet-flow gates in 1998

The Hoover Dam begins sending electricity over lines spanning 266 miles of mountains and deserts to Los Angeles on October 9, 1936.

Hoover Dam’s structural volume surpasses the largest pyramid in Egypt, which took 20 years and 100,000 men to complete.

96 workers died while constructing the Hoover Dam.

By 1997, there were an estimated 800,000 dams worldwide, some 40,000 of them over 49 ft high.

The tallest dams in China are some of the tallest dams in the world. Nearly 22,000 dams over 49 ft in height – about half the world's total – have been constructed in China since the 1950s.

171,000 people perished in 1975 China due to the collapse of the Banqiao Dam, an event hidden from the world until 2005.

The three gorges dam in China holds back so much water it slows the rotation of the earth slightly.

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