"1378 Fabricated steel forms for placing the 3-foot thick lining in the side wall section of the diversion tunnels being erected outside the upper portal of Diversion Tunnel No. 1. July 23rd, 1932.
1381 Apparatus devised for drilling grout holes through the concrete lining of the diversion tunnels. Air drills are mounted on bars. The grouting jumbo travels on rails laid on the invert floor. July 23rd, 1932.
1314 Workmen at isolated points away from drinking fountains are supplied by desert water bags. The picture shows a crew of ""water boys"" at the Arizona spillway. July 14, 1932
1315 Jackhamer men working on the floor of the Arizona spillway open-cut excavation. Workman in foreground is blowing dust from Jackhamer hole. July 14th, 1932"