Keywords: "High-scalers at work above inlet portal of Diversion Tunnel No. 1. Offset at right marks the upper reaches of the... - NARA - 293711.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 293711 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 1932-07-29 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-BC21341 Other versions <gallery> File High-scalers_at_work_above_inlet_portal_of_Diversion_Tunnel_No _1 _Offset_at_right_marks_the_upper_reaches_of_the _-_NARA_-_293711 tif tif File High-scalers_at_work_above_inlet_portal_of_Diversion_Tunnel_No _1 _Offset_at_right_marks_the_upper_reaches_of_the _-_NARA_-_293711 jpg jpg </gallery> NARA-cooperation PD-USGov People associated with the construction of Hoover Dam workers high scalers |