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hoover dam construction black and white photograph Hoover Dam, Penstock, construction, Great Depression, United States, civil engineering, hydroelectric dam, hoover dam construction black and white photograph Hoover Dam, Penstock, construction, Great Depression, United States, civil engineering, hydroelectric dam, hoover dam construction black and white photograph Hoover Dam, Penstock, construction, Great Depression, United States, civil engineering, hydroelectric dam,

Fascinating monochrome black and white photograph taking during the construction of the Hoover Dam turbine 1931-1936, commissioned  by President Franklin D. Roosevelt at the height of the Great Depression in the US.

/ unknown photographers

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