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<br />'. <br /> <br />'. <br /> <br />. <br /> <br />. <br /> <br />:~ , (' !' <br />~v...)u <br /> <br />2- <br />;.) <br /> <br />levee, north of Volcano Lake, extonding eastw?xd and connect- <br /> <br />ing with high land near Andrade. This levee is in Mexico and <br /> <br />its rneintenance is complic~tcd thereby. <br /> <br />In 1905, the riv~r scoured out the channcl of the <br /> <br />Imperial Canal and tcuned its entire volume into the Salton <br /> <br />Basin, eroding a dccp gorge and raising tho lovo~ of Salton <br /> <br />Soa. It submerged the salt works and forced the removal of <br /> <br />the main line of the Southern Pacific Railroad. At great <br /> <br />difficulty and expenSe, after several unsuccessful attempts, <br /> <br />the river was returned to its old channel in February, 1907. <br /> <br />Tne control of the river would be greatly facilitated if the <br /> <br />floods wore reduced in volume by storago. Investigations rAve <br /> <br />boen made cencerning tho feasibility of storing the floods <br /> <br />and reducing their volume to an aQOunt easily co~trollod. <br /> <br />The floods divido themsclves naturally into two <br /> <br />general classes - those from the Colorado River, which dratlns <br /> <br />large areas in Wyoming, Colorado, N<.m Mexico, Utah and Arizo=. <br /> <br />and those from the Gila, which lies mostly in Arizor2. and partly <br /> <br />in New Mexico and Me,dco. While tho =e2. drained is much <br /> <br />larger for the Colorado than for th3 Gila and tho water <br /> <br />supply vastly greater. the habits of flow are such that <br /> <br />the Gila River, owing to its flo.shy character, sometimes <br /> <br />furnishell flood waves at its mouth near Yuma almost as large <br />