Access Restricted Archival objects in this container: Construction phase of the Boulder Canyon Project; a horse team outfit at the Boulder City branch of the Los Angeles and Salt Lake Railroad, 1930 October 25 Construction phase of the Boulder Canyon Project; first round of drilling to enlarge the upper portal of diversion tunnel No. 2; the welded steel "Jumbo Rig" mounted on the truck has 25 air drills on it; the swing shift crew standing next to the rig prepare for work, 1931 November 18 Construction phase of the Boulder Canyon Project; excavation for the Hoover Dam construction substation by the Nevada-California Power Company, 1931 March 27 Ray Lyman Wilbur, Secretary of the Interior, at a ceremony which inaugurated construction on the Boulder City branch of the Los Angeles and Salt Lake Railroad, signaling the beginning of the Boulder Canyon Project. Includes Senator Key Pittman of Nevada; Governor Fred Balzar of Nevada; Carl Gray, President of Union Pacific Railroad system; Secretary Wilbur holding the Nevada silver spike; and Senator Tasker L. Oddie of Nevada, 1932 February 13 Gravel testing laboratory at the Stewart Ranch, also known as the Las Vegas Ranch, after completed repairs to the building, 1929 September Completed gravel testing laboratory at the site of the former Stewart Ranch, 1929 September Gravel testing laboratory at the site of the former Stewart Ranch; O. G. Patch stands in the foreground, 1929 September 20 Interior view of the gravel testing laboratory at the site of the former Stewart Ranch, 1929 September 20 Gravel testing laboratory at the Stewart Ranch, 1929 September 20 Gravel testing laboratory at the Stewart Ranch, 1929 September 20 Gravel testing laboratory at the Stewart Ranch Standing in the center is Henry Wieking, 1929 September 20 Interior view of the gravel testing laboratory at the site of the former Stewart Ranch, 1929 September Archaeological excavation at Willow Beach near Lake Mohave, excavation by Albert Schroeder, approximately 1948-1952 Archaeological excavation at Willow Beach near Lake Mohave, including H. O. Watts., approximately 1948-1952 H. O. Watts at an archaeological excavation site at Willow Beach near Lake Mohave, approximately 1948-1952 Men at an archaeological excavation at Willow Beach near Lake Mohave, approximately 1948-1952 H. O. Watts and others (possibly Bob Webb, Ann Helms and Barbara Russell) during an archaeological excavation at Willow Beach near Lake Mohave, 1950 H. O. Watts (right) and others (Bob Webb, Ann Helms and Barbara Russell) during an archaeological excavation at Willow Beach near Lake Mohave, 1950 Hoover Dam powerhouse; the Young Presidents' Organization arranged a party for nearly 1,000 people that was held on the powerhouse roof of Hoover Dam; the visitors, all wearing hard hats, were the first to use this setting, 1971 March 09 Celebration at the Hoover Dam powerhouse, 1971 March 09 Celebration at the Hoover Dam powerhouse, 1971 March 09
