Black and white image of Hoover Dam with the following printed description: "View of Memorial Day crowds waiting to visit the powerplant. Note persons holding tickets ready for guide to collect. Roof of cashier's booth may be seen beyond awning." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "Rotating field for the generator for Unit N5 under erection. Field poles installed ready for testing." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "View of 50-foot diameter tunnel below Arizona Tunnel Plug outlet works with Stoney Gate at end of tunnel lowered." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following description (provided by Special Collections): "View of bank 287.5 KVV transformers along the ramp of the Arizona powerhouse. April 1941." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of a Boeing B-17E (serial # 42-30628) flying over the Las Vegas Flexible Gunnery School, sometime before or during World War II. This facility later evolved into Nellis Air Force Base. Site Name: Nellis Air Force Base (Nev.); Las Vegas Flexible Gunnery School (Las Vegas, Nev.)