Access Restricted Archival objects in this container: 740: View of Boulder Dam and Lake Mead from the Arizona side: photographic postcard, approximately 1930 to 1939 A-3447: "Six Companies, Inc. buildings, Boulder City, Nevada" by Frashers Foto of Pomona, California: photographic postcard, approximately 1930 to 1939 A-3462: "Six Companies, Inc. construction work at Hoover Dam site, Colorado River, near Las Vegas, Nevada" by Frashers Foto of Pomona, California: photographic postcard, approximately 1930 to 1939 A-3461: "Six Companies, Inc. construction work at Hoover Dam site, Colorado River, near Las Vegas, Nevada" by Frashers Foto of Pomona, California: photographic postcard, approximately 1930 to 1939