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Around 10 Years.... The concrete used in this could build a highway fromLosAngeles to New York

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14y ago
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14y ago

The Grand Coulee dam was built from 1933 to 1975.(Thats 42 years!!!)

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11y ago

Thankfully, no bridge exists over the Grand Canyon.

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15y ago

$63 Million in 1933 dollars.

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12y ago

Fifteen years

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Q: How long did it take them to build the Hoover Dam?
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