Show STABILIZING THE MISSO MISSOURI t R Where dinosaurs wallowed l years ears ago In northeasters Montana and a great inland Ie set sei then linked the Gulf of Me Mean MexIco an and the Arctic ocean ocean splitting tho continent as we know it t to Is in twain twain Fort Fort day Peck dan daa now under construction will c cato create enate cre en- ate ato a reservoir capable of ot to- to pounding acre feet of water that can be released when wha needed to fill a navigable ch channel chat chan a anel nd nel that is to make practicable modern water-borne water traffic ot 05 the tho lower Missouri river Sioux City Iowa and the of that stream a stretch of ot TN miles The Missouri river fluctuate greatly in the tho volume of its fbi flor At its water low stage it h has dis dJ discharged charged into the Mississippi u as little as cubic feet of water per second while the outpouring at flood stages hu has reached as much as feet per second t Fort Peck dam will wuL be the lup Lur- est cst fill earth-fill dam in existence It nj will bo be composed of cubic yards of earth fill fil will hm hue huea a main body crest of around m feet a height of oC feet and I a abase base baso spread d of 2875 2375 feet teet To build this man-made man moue mout tain thin the engineers have laid first th the extreme edges of the fill 0 or what is known as the up and down stream down stream toes of the dan dau Within the area so enclosed alake t a lake has been formed by water pumped in to bring the soil solI in suspension from borrow At these borrow pits soil n water are agitated to make a soupy mixture pumps carry muddy water through long pi pIp lines Jines past booster pumping ila- ila and finally to the enclosed td Because Be Bt- lake Jake where it is discharged cause causo of the large area of ot th the lake the fine mud has has' an opportunity op opo to settle out and SOU solid solla- I as a tightly compacted core core of the future futuro dam In addition to this soil there will wm be toll tea and upstream facing of bouldin to prevent wash |