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Show Uncle Sam Builds a Dam l - " AS?. v-' A i " - - 1 WORK goes on day and night at Grand Coulee dam on the Columbia river in eastern Washington, where the U. S. is building the world's most massive masonry structure. i . ' r ' . 1 : . v . j, : i -. : Grand Coulee I . . , i .- . .. .,- will be three-quar- V . t.J ! ... , j ters of a mile long " ,.- N .' -- -1 and 550 feet high. 'i j : Hi'- ;f,- ' -v- v j. I j Since December, - - : ; '' ' ' i 1935, men have S - . " " - j'v-. - J been excavating t . "Z- .. --. ..'u- - and mixing con- K giS . " v ' .. . 3 Crete for the foun- j, ' 1 S X 1 - - ' dation, to be fin- k- - 1 ished early this t: ly ; - V' v 1' ' I year. Weak seams " . . "AC-. V"'-' of rock must be 1 ''"- "- " .-i ' Grand Coulee will be three-quarters of a mile long and 550 feet high. Since December, 1935, men have been excavating and mixing concrete con-crete for the foundation, foun-dation, to be finished fin-ished early this year. eak seams of rock must be removed, since only the hard granite underlying the Columbia can be used for foundation purposes. Since three shifts a day are employed, the government has established a permanent community for workers. ' 7cri' -'--'-' ' " .- j " ' 7 ' ' ii-, 7 I . . !7 - i , v. . S - 7-. v.;;-;: ''- ..-:..v : ... ; " : I .. :S A pile of three-quarter inch grav- ; , t r ' ' w--- ( el is fed continuously frum the it 1 i lis screening plant above, dropping to : ' . I 1. . ! 1 I 1 a bell conveyor which carries it to ; , , t i ' i' '. ' "n. the aggregate mixing plants at the j t ... dam site. Like the factory It Is. the f-' 5 . ' ! mixing plant (right) works 24 hours , , ' a day combining cement with sand. ; i . gravel and water making 8.000 cubic . yards of concrete daily. A pile of three-quarter inch grav- ; el is fed continuously frum the ; screening plant above, dropping to 1 a bell conveyor which carries it to the aggregate mixing plants at the dam site. Like the factory It Is. the mixing plant (right) works 24 hours a day combining cement with sand, gravel and water making 8.000 cubic yards of concrete daily. ' r - i fie. n' 'T'y.: . jfc-c: " 111 xsj L'- . ' - . . .. r - 7a r '"; " 7 " ' 7-.;..,.;;i7: ;77::777 r ':.:: r-' ;: . ) bj -7;iifEfrP- - .', - - v e X - ' . : ..i I ' ':';' ,...' u. (. . . ' . r- V;. :-" - :. : ! While supervisors guide concrete buckets by trlrphnne. Grand Coulee takes shapo. Upper picture shows how tt will look when finished, com-pared com-pared with lower photo showing present status. Fur greater than Boulder dam In Colorado, Grand Coulee Is the most nmbitlous water power pow-er project ever undertaken by man. t I ' -. -i ' ' ... .- 1 - ;,,f. , .', .... ' ' . . i , ; , ,.'"' I It's only a step from Grand Coulee homes to the dnru site. |