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| Keywords: Looking upstream into Black Canyon toward Hoover damsite showing four diversion tunnel outlets - NARA - 293813.jpg Scope and content Photograph from Volume Two of a series of photo albums documenting the construction of Hoover Dam Boulder City Nevada General notes 293813 Local identifier Department of the Interior Bureau of Reclamation Engineering and Research Center 05/18/1981 - 03/04/1988 NARA's Rocky Mountain Region Denver NRGA Building 48 Denver Federal Center West 6th Avenue and Kipling Street Denver CO 80225-0307 1933-02-25 Record group Record Group 115 Records of the Bureau of Reclamation 1889 - 2008 Record group ARC 444 Photograph albums compiled 1903 - 1972 Series ARC 293611 File unit File unit ARC Variant control numbers NAIL Control Number NRG-115-CONSTPHO85006-BC21557 Other versions <gallery> File Looking upstream into Black Canyon toward Hoover damsite showing four diversion tunnel outlets - NARA - 293813 tiff tif File Looking upstream into Black Canyon toward Hoover damsite showing four diversion tunnel outlets - NARA - 293813 jpg jpg </gallery> NARA-cooperation PD-USGov Suspension bridges in Arizona Hoover Dam low level Suspension bridges in Nevada Hoover Dam low level Bridges across canyons in Arizona Hoover Dam low level Bridges across canyons in Nevada Hoover Dam low level Bridges over the Colorado River Hooveer Dam low level 1932 in the United States Hoover Dam Construction of the Hoover Dam suspension bridge low level | ||||
