Show concrete flow at boulder dam starts N 0 aa 01 4 t IN AV J 14 47 4 I 1 aak aa X 19 1 1 1 I 1 tp 1 A wa pouring of concrete into the foundations ot of boulder daw dam begau bebau without caremon ce ceremony remon although two years had been spent in completing work on what will be the worlds largest darn dam and had bad been expended so BO that the actual building of the huge concrete wall could begin the cheering of workmen was the only celebration to mark the momentous moment the proto 1 shows workers pouring the first firlit concrete |