Access Restricted Archival objects in this container: Six Companies, Inc. office building on the left and a dormitory on the right, 1931 June 01 Hoover Dam and its power plant, 1984 March 21 Spillway on the Nevada side of Hoover Dam running at peak capacity of 13, 944 cubic feet per second, approximately 1982-1984 Aerial view of Hoover Dam, Colorado River, and Lake Mead, 1975 May 15 Hoover Dam, 1967 August 08 Aerial view looking upstream at Hoover Dam and Lake Mead and showing the white water of the Colorado River, 1983 July 28 Hoover Dam at night, 1966 April 20 Hoover Dam's Nevada powerhouse, approximately 1981-1983 Generators inside the power plant at Hoover Dam, approximately 1940-1959 Aerial view of Hoover Dam and Lake Mead, approximately 1940-1959 Aerial view looking upstream at Hoover Dam and Lake Mead and showing the white water of the Colorado River, approximately 1940-1959 Aerial view of Hoover Dam and Lake Mead, undated Tyrone Power and Annabella Power visit Boulder Dam, with them are Mr. Marion McKeen (Thompson Trophy Pilot) who flew the Powers to Boulder City, and R. B. Spearman who conducted the party through the powerhouse, 1939 May 26