 There were 112 deaths associated with the construction of the dam . The first was J. G. <unk> , a surveyor who drowned on December 20 , 1922 , while looking for an ideal spot for the dam . <unk> @-@ six of the deaths occurred during construction at the site . Of the 112 fatalities , 91 were Six Companies employees , three were BOR employees , and one was a visitor to the site , with the remainder employees of various contractors not part of Six Companies . 
