Question: who is put in charge of building the dam

title: Hoover Dam
text: The men who removed this rock were called `` high scalers '' . While suspended from the top of the canyon with ropes , the high - scalers climbed down the canyon walls and removed the loose rock with jackhammers and dynamite . Falling objects were the most common cause of death on the dam site ; the high scalers ' work thus helped ensure worker safety . One high scaler was able to save life in a more direct manner : when a government inspector lost his grip on a safety line and began tumbling down a slope towards almost certain death , a high scaler was able to intercept him and pull him into the air . The construction site had , even then , become a magnet for tourists ; the high scalers were prime attractions and showed off for the watchers . The high scalers received considerable media attention , with one worker dubbed the `` Human Pendulum '' for swinging co-workers ( and , at other times , cases of dynamite ) across the canyon . To protect themselves against falling objects , some high scalers took cloth hats and dipped them in tar , allowing them to harden . When workers wearing such headgear were struck hard enough to inflict broken jaws , they sustained no skull damage , Six Companies ordered thousands of what initially were called `` hard boiled hats '' ( later `` hard hats '' ) and strongly encouraged their use .