Keywords: Boulder Canyon Outlet portal of diversion tunnel No. 2 showing Stoney gate steel in place above portal and form work... - NARA - 293802.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 293802 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-BC21539 yes Other versions <gallery> File Boulder Canyon Outlet portal of diversion tunnel No 2 showing Stoney gate steel in place above portal and form work - NARA - 293802 jpg jpg </gallery> NARA-cooperation PD-USGov Construction of the Hoover Dam NARA TIF images with categorized JPGs |