Archival objects in this container: Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Penstock pipe inside the Hoover Dam powerhouse, approximately 1935-1940 Visitors posing in the gallery leading from the elevator to the Hoover Dam powerhouse, approximately 1935-1940 Visitors standing in the gallery leading from the elevator to the Hoover Dam powerhouse, approximately 1935-1940 Interior of Hoover Dam powerhouse, approximately 1935-1940 Interior of Hoover Dam, approximately 1935-1940 Hallway of Hoover Dam's visitor gallery, approximately 1937-1940 Hallway of Hoover Dam's visitor gallery, approximately 1937-1940 Visitor gallery leading from the elevator to Hoover Dam's powerhouse gallery features terrazzo floors, approximately 1935-1939 Visitor gallery leading from the elevator to Hoover Dam's powerhouse gallery features terrazzo floors, approximately 1935-1939 Visitor gallery leading from the elevator to the Hoover Dam's powerhouse gallery features terrazzo floors, approximately 1936-1939 Rest room area at the Hoover Dam's powerhouse and its terrazzo floor, approximately 1935-1939 Office area at the Hoover Dam and its terrazzo floors, approximately 1935-1939 Men's restroom at Hoover Dam, approximately 1935-1940 Shower stalls at Hoover Dam, approximately 1935-1940 Lockers and shelving at Hoover Dam, approximately 1935-1940 President Roosevelt in his car en route to the dedication of Hoover Dam, 1935 September 30