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Carl Gray handing Ray Lyman Wilbur the first railroad spur spike for Hoover Dam, approximately 1930-1933
Archival Collection
Archival Component
Representatives of the Colorado River Commission, approximately 1930-1933
Archival Collection
Archival Component
Colorado River above Black Canyon before construction on the Hoover Dam, approximately 1930-1934
Archival Collection
Archival Component
Beginning of a 5000-hole blast, Hoover Dam, approximately 1930-1934
Archival Collection
Archival Component
High scaling operations at the Hoover Dam site, approximately 1930-1934
Archival Collection
Archival Component
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