This photograph has four images. The first one (0272_0052) with the upside-down picture, has a handwritten inscription that reads, "View of hi-line and carriages on a double cable. First used on buckets. Was a little slow. These hi-lines stretching across the dam on a huge cable. Consist of several small cables in center, weaved together. In the center, outside, the carriages ride on smooth surface of one inch wide steel strips wrapped around the cables for a tight and smooth surface." The second image (0272_0053) reads, "'Pipe fitters' raising air and water pipe to a higher elevation for easier access." The third one (0272_0054) reads "'The water bag', a very popular item on Dam. Warning signs placed around, 'Do not drink water from taps on dam'. Arsenic in the water and in the mts. Once you get an open cut, you must avoid getting water from the dam in it. You have a good chance of arsenic poisoning. A boy in my dormitory got it. He broke out in sores at some spot. After long treatments it would heal, but two or three weeks break in another spot. Once in the blood, too bad." The fourth image (0272_0055) reads "Another good view. Stiffleg making a pour on dam nearest and #7 working in a lower pour - pours are numbered - from face to upstream face. 1-2-3 etc. across from wall to wall by alphabet, the slot (center) is between J & K."

This photograph has three images. The first image (0272_0032) shows the lower portals on the Arizona side. The handwritten inscription reads, "Each drill is connected with a water line to wash the drill dust out, and to aid the men in breathing. At end of shift the men come out the tunnels looking like chocolate soldiers, being covered red with mud out of the drilled holes. The temperature often reaches 126 degrees in tunnels. Glad I was a form raiser." The second one (0272_0033) reads, "Upper portals, working bridge for trucks. Taking muck from tunnels, using it to make temporary dam across river to direct water through tunnels." The third one (0272_0034) reads "First big blast in canyon as seen from road above canyon."

This photograph has three images. The first one (0272_0094) shows the Boulder Dam Hotel in Boulder City, Nevada. The inscription reads, "A new building built in 1934-35. Needed to accommodate influx of visitors to the dam." The second one (0272_0095) depicts a residential section in Boulder City, Nevada. It reads "City built for government men - very neat - with green grass and ornamental plants - in the far distance were small houses for dam workers with families." The third image (0272_0096) has a handwritten inscription that reads, "Dam is completed, visitors driving along the top for a thrill. Water has backed up to height of lower intake valve."

This photograph has three images. The first one, (0272_0005), reads "This picture shows 'tail tower'. Each tower has a 50 ton counter-weight on each tower. Man sitting on tract is tender," as a handwritten inscription. The second, (0272_0006), reads "The view the operators see. Head towers of four hi-lines- I understand this is the first time this type of handling the mud, ever been used," as a handwritten inscription. It shows No.7 and 8 at left of photo and No.5 and 6 at right. The third, (0272_0007) that's upside down reads, "Upstream face nearing completion began collecting water. Notice how small the men look on the catwalks. This picture taken Jan. 5th, 1935," as a handwritten inscription.

This photograph has three images. The first one, (0272_0046) has a handwritten inscription that reads , "Arizona spillway empties into 50' diversion tunnel, which will be blocked off above intersection of spillway. The rest of the tunnel is of no use anymore. It was used to divert water around dam while being built. Stoney gate will release as well as the spillway." "This section of the tunnel was very unstable. Sections of the tunnel would fall without giving any warning at all. Kept the men spooked. I knew a young fellow, who told me he had to get drunk before he could get up enough nerve to go to work. Couldn't get a transfer. This kind of work I call 'hero's of Boulder Dam." The second one (0272_0047) reads "Like donkeys in a mine never see daylight." It was a trucking mammoth concrete buckets in the 50 ft. diameter tunnels at Hoover Dam, an Oakes photo. The third one, (0272_0048) reads, "visit of L.A. Examiner scout car - crossing canyon on Gov. Hi-line."

This photograph has three images. The first one (0272_0056) reads, "See the river behind the dam. A heavy flow storming upriver, slot in middle of dam has gauges installed along to register heat generated by this pile of cement. Pipe strung along bottom of each pour on each level of the dam, ends in the slot. Each pipe at each level will be pumped with refrigerated water until each level has been cooled. Then the pipes will be pumped full of cement. They will then fill that 5 ft. height. If not cooled, would generate enough heat to explode." The second one (0272_0057) is upside-down, and it reads, "#8 hi-line with doors open; line is slack on doors. This line is called, by bell boy to operator, the load line. When full of mud this line carries the load. No.8 is now using single line, makes it faster and quieter." The third image (0272_0058) reads "No.8 and No.7 working off hi-trussel." The top arrow: hook tender, bottom arrow: donkey operator and his donkey - run by electricity." It also says, "No.8 using 4 yd. bucket to pour small forms on the face of the dam. Some forms become quite small as the slant of the dam shortens them at each height."

This photograph has three images. The first one (0272_0084) reads, "Top of dam about one form wide - everyone getting in each other's way" (duplicate of Image 0272_0016). The second image (0272_0085) reads, "Getting higher and more enormous. Can you see what's swinging on end of No.7 line?" Refers to the arrow at the top right of photo. "(3) tunnels drilled for penstocks that divert water to turbines. So much to tell about, that's shown in this pic. You can see where the turbines will set. The (slot) in middle of dam indicates how much of the dam has been cooled. Notice how dam curves into canyon walls - to brace against weight that will build up behind it." The third image (0272_0086) shows an early view of the enormous amount of excavating being done and tailings to be moved. An inscription reads "Pouring cement on any part of the dam has not begun, only the diversion tunnels and tracks for head tower and tail tower that hi-lines across the channel are connected to" (referring to the arrow at top of photo). The inscription continues "(x) Reeve fell down this tunnel but was cemented at that time. On the dam I never heard anyone being hurt with falling rock. But - most injuries and fatalities occurred building roads to the dam and at the location of dam. No men have been covered up and left in the cement. Nothing but the purest cement went into the construction of dam, maybe a piece of metal if it wasn't oily. About men being buried in the dam is a misconception (sic). Some have been covered up with cement when the bucked dumped out of control, but the men were rushed to first aid and washed off, and treated, but very few injuries."