Keywords: "Looking into Black Canyon at Nevada Diversion Tunnel intake portals from top of canyon wall on Arizona side. Trash... - NARA - 293671.tif Scope and content Photograph from Volume Two of a series of photo albums documenting the construction of Hoover Dam Boulder City Nevada General notes 293671 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 1932-06-01 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-BC21230 yes Other versions <gallery> File Looking_into_Black_Canyon_at_Nevada_Diversion_Tunnel_intake_portals_from_top_of_canyon_wall_on_Arizona_side _Trash _-_NARA_-_293671 tif tif File Looking_into_Black_Canyon_at_Nevada_Diversion_Tunnel_intake_portals_from_top_of_canyon_wall_on_Arizona_side _Trash _-_NARA_-_293671 jpg jpg </gallery> NARA-cooperation PD-USGov NARA TIF images with categorized JPGs |