Archival objects in this container: Dust from explosions in canyon walls during the construction of the Boulder Dam in Arizona: photographic print, 1933 May 10 Construction of the Boulder Dam in Arizona: photgraphic print, 1934 January 15 Construction of the Boulder Dam in Arizona: photgraphic print, 1933 June 02 Colorado River in Black Canyon, Arizona: photographic print, 1932 May 12 Unidentified construction workers on top of a large piece of equipment: photographic print, 1933 December 01 Unidentified construction workers on top of a large piece of equipment: photographic print, approximately 1932 to 1934 Unidentified construction workers on top of a large piece of equipment: photographic print, approximately 1931 to 1936 Interior view of the Nevada spillway tunnel: photographic print, 1933 October 07 Large piece of construction equipment at the Boulder Dam in Arizona: photographic print, 1933 December 01 Construction of the Boulder Dam in Arizona: photgraphic print, 1933 July 22 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, 1934 October 15 Construction of the Boulder Dam in Arizona: photgraphic print, 1933 November 15 Construction of the Boulder Dam in Arizona: photgraphic print, 1934 Nighttime view of the Boulder Dam in Arizona: photographic print, approximately 1931 to 1936 Colorado River in Black Canyon, Arizona: photographic print, 1932 March 14 Exterior view of a tunnel during construction of the Boulder Dam in Arizona: photographic print, 1933 April 24 Construction equipment inside of a tunnel at the Boulder Dam in Arizona: photographic print, approximately 1931 to 1936 Construction of the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 View from the top of construction site at the Boulder Dam in Arizona: photgraphic print, approximately 1931 to 1936 Load More