(AP Photo)
Construction continues Jan. 9, 1932, as workers build the retaining wall that gives support to the road leading over the top of Hoover Dam. Labor troubles were experienced during the huge engineering project on the Colorado River.
(AP Photo)
Construction continues Jan. 9, 1932, as workers build the retaining wall that gives support to the road leading over the top of Hoover Dam. Labor troubles were experienced during the huge engineering project on the Colorado River.