Hoover Dam - 2 of 3 TUNNELS

HOOVER DAM, named for the 31st President of the US has provided electricity and water to the Southwest since the 1930s, without which cities like LA could not have grown. or the surrounding regions farmlands irrigated (which supply 80% of our nations fruits and vegetables).

It took decades to approve construction of a dam at Black Canyon, but only five years to build it. Once started, it took 39,816,000 man-hours, 4,452 man-years, 840 miles of pipes, 6.36 million cubic yards of concrete (with a special formula of concrete coming). A Nationwide Effort Support for the Hoover Dam Project came from ALL 48 states. People and materials (i.e., 5,055 workers from CA as well as the turbines, rock for the terrazzo floors) came from each state. The dam straddles the border of Arizona and Nevada in the Black Canyon of the Colorado River and was dedicated by President Franklin D. Roosevelt in 1935.もっと詳しく