Search for all of "Black Canyon", all of "Standard Oil Co Of California", all of "Hoover Dam ariz And Nev -- Design And Construction"

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Hoover Dam construction View of construction of Hoover Dam from the upper portals. Hoisting machinery and an intake tower are visible. The Colorado River in Black Canyon can be seen also.
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Colorado River -- Hoover Dam site View looking down at the Colorado River in Black Canyon, the future site of Hoover Dam. Roads and buildings can be seen on the banks above the river and some construction equipment is visible.

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