Archival objects in this container: Three gravel pits, likely on Arizona side: photograph, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (1 of 6 views): photographs, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (2 of 6 views): photographs, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (3 of 6 views): photographs, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (4 of 6 views): photographs, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (5 of 6 views): photographs, approximately 1932 View of first-aid and hospital buildings near the lower diversion tunnels and temporary bridge (6 of 6 views): photographs, approximately 1932 View of Colorado River and Black Canyon with temporary suspension bridge from above: photographs, approximately 1932 Four cars driving on unfinished road, likely near Hoover Dam: photograph, approximately 1932 View of winding road, likely near Hoover Dam: photograph, approximately 1932 Single car driving on paved road, likely near Hoover Dam: photograph, approximately 1932 Car driving on road with snow-capped mountains in the background, a white building (possibly LDS Temple) in the distance; unknown location: photograph, approximately 1932 Ernest Mitchell Pratt, approximately 60 years old: photograph, approximately 1936