Men blast away the rock to extend the face of a channel from a sedimentation tank towards the pumping wells and machinery room. The rock is shevelled on to a chute and falls into a truck below. August 4, 1950.
Men blast away the rock to extend the face of a channel from a sedimentation tank towards the pumping wells and machinery room. The rock is shevelled on to a chute and falls into a truck below. August 4, 1950.