Film strip of Boulder City or Hoover Dam construction, image 016: photographic print

This photograph has three images. The first one (0272_0066) reads, "High and low level (x) is location of control gates. When completed - 380 ft. high - 85 ft. diameter at base - cylinder gates, at base, and 150 ft. higher. Steel and concrete bridges connect towers to the dam control house on each tower to operate gates - weighting half million pounds." The second one (0272_0067) reads, "Babcock and Wilcox Plant - 'Home of 30' pipe' - Being unable to transport large pipe by rail - it was necessary to build an onsite plant 1 1%2 mi. from dam." The third image (0272_0068) has a handwritten inscription that reads, "Lowering first section of 50 ton pipe to 80' penstocks leading from intake towers."