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<br />..... <br />Cl <br />--J <br />rv <br /> <br />Salinity Control Units <br /> <br />To keep tile salinity levels within the <br />1972 gUidelines (now standards as <br />adopted by the Basm Slates} set down <br />by the Environmental Protection Agency <br />tEPA). the Congress passed PubliC Law <br />93-320. the --Colorado River Basin <br />Salinity Control Act'. In 1974 Title I 01 <br />th,s act autnOflzed necessary actions to <br />meet the 1973 water quality agreement <br />With MexIco The desalting complex <br />being bUilt below Imperial Dam near <br />Yuma Arizona. IS one 01 the main <br />features of T\lIe I <br /> <br />Title II authorized construction 01 Iou! <br />salinIty control units and directed Water <br />and Power to expedite studies at other <br />unIts. With assistance lrom other Federal <br />agencies The act also prol/lded for the <br />naming of a Colorado River BaSin <br />Salinity ContrOl AdVisory CounCil <br />comprised 01 members nommated by <br />the Governors of the Basm States <br /> <br />Sa1inlly Standards <br /> <br />723 mglL Below Ham'er Dam <br />747 mglL Below Parker Dam <br />879 mg.'L At Imperia! Dam <br /> <br />The Colorado River BaSin Water Quality <br />Improvement Program and the salinIty <br />standards adopted by the States and <br />approved by EPA contemplate <br />continued development 01 water <br />supplies while pursuing the most cost- <br />eflectlve control measures to offset the <br />salinity Increases II conditions are as <br />predicted In the year 2000, abou1 2 8 <br />million tons 01 salt a year will have to be <br />removed trom the fiver to meet the goals <br />set In '972 <br /> <br />The general types 01 saline water that <br />Water and Power Isallemptlng to control <br />are claSSified as three sources <br /> <br />POint -minerai springs. wells. <br />geysers, and mine drainage. <br />IrrigatIOn-deep percolating waters thaI <br />leaCh salts trom saline for- <br />matIOns, these waters may <br />come trom unlmed canals <br />and laterals and e>:cesslve <br />Ileld applications. <br />Dltluse -combmatlon 01 erOSion. <br />Ifflgatlon return tlow. and <br />small pomt sources a <br />tflbutary fiver basm IS an <br />e;(ample <br /> <br />Those units havmg a pOint source are <br />laVerkm Spnngs. Utah. lower Virgin <br />River. Arizona and Glenwood-Dotsero <br />Springs and Meeker Dome, Colorado <br />AuthOrIZed units ParadoJ Valley. Las <br />Vegas Wash. and Crystal Geyser are also <br />pomt sources <br /> <br /> <br /> <br />OIl/use source controt units are Big <br />Sandy River. Wyoming. Dirty Devil River, <br />Utah. and the Price-San Rafael Rwers. <br />also In Utah <br /> <br />Irrigation source control units Include <br />the Umta BaSin of Utah, PalO Verde <br />lrngatlon District m California. and <br />Lower Gunnison BaSin and McElmo <br />Creek m Colorado The authorized <br />Grand Valley unit also IS an Irrigation <br />source <br /> <br />If all units are constructed. almost 2 <br />million lOns 01 sail could be removed per <br />year Wlm a reduction at 1m penal Dam of <br />about 200 milligrams salinity per liter of <br />water <br /> <br />- <br /> <br />~.--,... <br /> <br />~ <br /> <br />'- <br /> <br />~ <br /> <br />~" <br />=.......... <br /> <br /> <br />~.. <br /> <br />~..-.. <br /> <br />Sail Removal ElIects <br /> <br />R~mo...dby <br /> <br />Ton. o. S,II <br />Remo"ed <br />~tY." <br /> <br />7' <br />Con<;.nl,.IIOI'I .' <br />R.ou.<::IIonal <br />Impetl.IO.m. . <br />(m'il L) <br />" <br /> <br />''''llal U,.HIS <br />(alJtl1<:"'z<>dIO' <br /><;on~T'lJ<;llonl <br />Po.nl So"r<;oe~ <br />l'flgaT'D"So,,'<;oes <br />D,Hu~oe Sourcoes <br /> <br />;00000 <br /> <br />~42000 <br />J~S.ooo <br />448000 <br /> <br />50 <br />" <br />38 <br /> <br />A<;l'''''' UnllS <br />TOTal <br /> <br />1635.000 <br /> <br />'" <br /> <br />- - <br /> <br />- <br /> <br />~ <br /> <br />3-. "I <br /> <br />PARADOX VALLEY UNIT <br /> <br />!.Al!YIHO <br />lC.AllON!.AlIWAlill <br />1;>9_..~ <br /> <br />A"'AlY!.I!. <br />.(.'''0'' "'110 <br />JlJO'OI.JooO\\.,' <br /> <br />CH(MICAl CONn"" <br /> <br />e......e.. eOoo..o" <br />.(/to""", ......~'^. <br />..." '_\.0" <br />.U I......... <br />".'" ....~....~..- <br />(.w. {;....~ <br />...\0. "~-"'" <br />~.<;o. ,.~. <br /> <br />o,K'''' <br />." <br />" <br />.. <br />.. <br />" <br /> <br />, <br /> <br />"'" <br /> <br />-- <br /> <br />- <br /> <br />-. <br /> <br />. <br />