"2388 Boulder Dam, looking upstream. October 15th, 1933.
2405 Upstream plug in Diversion Tunnel No. 3, after excavation of raise and Upstream Intake Tower was completed. October 30th, 1933.
2413 Boulder Dam, looking downstream. October 31st, 1933."
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.