Hoover Dam (USA) - concrete dam on the Colorado River
Location show on map
Arizona and Nevada, USA
Date of build
1931 - 1936
The firewall was built to improve hydration, obtain electricity and, above all, to control the 2333 kilometer Colorado River, which is unpredictable and has already appeared on the banks.
Hoover Dam (named after the then president Herbert Hoover) was the biggest dam in the world in its time.
It took 2.5 million m3 of concrete to build a dam, which would be enough to build a two-lane road from Seattle to Miami, and the need was 8.2 million tons of stones. The firewall has as much steel as Empire State Building .
At the base is 201 m long and rises 220 m upwards, which is more or less the height of a 70-story skyscraper. At the top, the dam is 375 m long and 14 m thick.
On its northern side formed the lake Mead, one of the largest man-made reservoirs in the world. The length of the lake is 177 km, and the length of the shoreline is 1323 km.
Hoover Dam is the second highest dam in the country and 18 of the highest in the world.
The dam is so thick and durable that it would not have to be curved and would withstand the pressure of water. Engineers thought that residents would feel much safer with a bent dam.
The dam creates 4 billion kilowatt hours a year, which would be enough to handle 1.3 million people.
Official website: http://www.usbr.gov/lc/hooverdam/