"2666 Looking upstream in Black Canyon, showing the downstream face of Boulder Dam. April 30th, 1934.
659 View showing installation of 100-ft. Drum Gates in the Arizona Spillway. April 28th, 1934.
2664 Looking upstream in No. 5 Penstock tunnel, showing penstock outlets, manways and pedestal recesses.
April 28th, 1934."
black and white photographs 4 x 5.3 in. or 8 x 4.8 in. paper background 10 x 13.5 in.
Archived TIFF images were scanned by Kathleen Broeder at 400 dpi with an Epson Expression 10000XL scanner. Digital images were reformatted in Photoshop. JPG and PDF files were then created for general use.