By Ivan Penn.
Hoover Dam helped transform the American West,
harnessing the force of the Colorado River — along with millions of
cubic feet of concrete and tens of millions of pounds of steel — to
power millions of homes and businesses. It was one of the great
engineering feats of the 20th century.
Now it is the focus of a distinctly 21st-century
challenge: turning the dam into a vast reservoir of excess electricity,
fed by the solar farms and wind turbines that represent the power
sources of the future.
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