Access Restricted Archival objects in this container: 458: View of Boulder Dam from the Lower Portal Road, showing #2, #3, and #4 diversion tunnel outlets: photographic postcard, approximately 1930 to 1939 448: View of Boulder Dam and Powerhouse construction from the riverbed: photographic postcard, approximately 1930 to 1939 450: View of Boulder Dam from Lookout Point: photographic postcard, approximately 1930 to 1939 363: Boulder Dam under construction: photographic postcard, 1934 January 469: Boulder Dam under construction: photographic postcard, approximately 1930 to 1939 495: View of Boulder Dam from downstream: photographic postcard, approximately 1930 to 1939 399: Postcard showing a collage of various Oakes photographs of Boulder City, Nevada and the Hoover Dam: photographic postcard, approximately 1930 to 1939 516: Postcard showing a collage of various Oakes photographs of Hoover Dam construction: photographic postcard, approximately 1930 to 1939 517: Postcard showing a collage of various Oakes photographs of Las Vegas, Nevada and the Hoover Dam: photographic postcard, approximately 1930 to 1939 519: Postcard showing a collage of various Oakes photographs of Hoover Dam construction: photographic postcard, approximately 1930 to 1939 518: Postcard showing a collage of various Oakes photographs of Hoover Dam construction: photographic postcard, approximately 1930 to 1939 494: View of the Arizona spillway and heavy equipment, Boulder Dam: photographic postcard, approximately 1930 to 1939 520: Postcard showing a collage of various Oakes photographs of Hoover Dam construction: photographic postcard, approximately 1930 to 1939 443: View of the upstream face of Boulder Dam: photographic postcard, approximately 1930 to 1939 446: "The barrier which will control the water of the Colorado, Boulder Dam": photographic postcard, approximately 1930 to 1939 500: View of Boulder Dam with reservoir filling up: photographic postcard, approximately 1930 to 1939 498: View of the crest of Boulder Dam: photographic postcard, approximately 1930 to 1939 502: Boulder Dam under construction: photographic postcard, approximately 1930 to 1939 508: View of Boulder Dam construction with pipes suspended above: photographic postcard, approximately 1930 to 1939 507: Boulder Dam under construction: photographic postcard, approximately 1930 to 1939 506: Boulder Dam under construction: photographic postcard, approximately 1930 to 1939 509: Powerline at Boulder Dam: photographic postcard, approximately 1930 to 1939 499: Construction of the powerhouse at Boulder Dam: photographic postcard, approximately 1930 to 1939 510: View of Boulder Dam with reservoir filling up: photographic postcard, approximately 1930 to 1939 530: View of Boulder Dam with reservoir filling up: photographic postcard, approximately 1930 to 1939 Load More