"2230 General view of bedrock for Hoover Dam, showing final excavation cleanup. View taken looking upstream.
June 3rd, 1933.
2239 First forms for Hoover Dam. View taken looking downstream. June 6th, 1933.
2210 Test of 150-ton Government Cableway. May 22nd, 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.