Show uncle sam builds a dam oi tic J I 1 a 1 I 41 11 W ORK goes oci on day and night at grand coulee dam on the columbis river in eastern washington where the U S Is building the worlds world most ost massive masonry structure k W T grand coulee coule will KM be three ten of a mile long lon t and feet high A since december A 1935 men have been excavating and nd mixing concrete for the foundation to be finished early this year Weak We akeam seams 71 of rock must be removed since ance only the hard granite underlying the columbia can c b e used tor for foundation purposes since three shifts a day are ar empt employed e the government has established a permanent community for wo era t Z A Z f A A 9 J A pile of three quarter inch grav el 1 I is fed continuously from the screening breening cre ening plant above dropping to a belt conveyor which carries it to the tie aggregate mixing plants at the lam dam site like the factory it is the thea nixing mixing plant right works 24 hours hoursh a day combining cement with sand gravel ravel and water making cubic yards of concrete daily I 1 K al 4 Z a 3 while supervisors guide concrete buckets by telephone grand coulee takes akes shape upper picture shows how it will look when finished corn com pared ared with lower photo showing present status far greater than boulder dam in colorado grand coulee to Is the most ambitious water er project ever undertaken by man t Z Y 5 P 4 51 1 va i its only a step from grand coulee homes to the afie darn dam site |