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<br />SALINITY <br />CONTROL ~ <br />\...A...,A..,.A/",(. . <br />\..A.A.AJV( <br />\.AAA..A.Jv Jo... <br /> <br /> <br />I <br /> <br />, <br /> <br />The Colorado River Water Quality Im- <br />provement Program was begun in fiscal <br />year 1972 and is scheduled to continue <br />through fiscal year 1981. The objective <br />is to investigate and develOp plans to <br />control the buildup of salinIty concen- <br />tration In the river system. Authority <br />for the investigation is derived from <br />PubliC laws 84.485, 87.483, and 87. <br />590 relating to the Colorado River Stor. <br />age Project and Participating Projects. <br />Navajo Indian Irrigation Project and San <br />Juan.Chama Project, and the Fryingpan. <br />Arkansas Project, respectively. Fea. <br />sibility studies were scheduled to be <br />made on irrigation, point. and diffuse <br />salmity sources. Studies will require de. <br />velopment of a mathematical model of <br />the Colorado River, economic analysis <br />of water Quality, analysis of legal and <br />institutional matters, and the investiga. <br />tion of potentials lor improving water <br />QualIty at points of diversion. Irrigation <br />sources will be studied for possible <br />improvements. both to the physical <br />systems and to the management tech. <br />niQues. <br /> <br />The Colorado River Basin Salinity Con. <br />trol Act (P.L 93.320, June 24, 1974) <br />authorized the Secretary of the Interior <br />to construct and operate the Paradox <br />Valley, Grand Valley, and Crystal Geyser <br />Units in the Upper Colorado River Basin <br /> <br />and the Las Vegas Wash Unit in the <br />Lower Colorado River Basin. Advance <br />planning on these units is underway. <br />The Paradox Valley Unit will be de. <br />Signed to Intercept and dIspose of <br />highly saline ground waters now enter. <br />Ing a short section of the Dolores River <br />In southwestern Colorado. Control <br />measures in Grand Valley, Colorado, In' <br />elude lining and rehabilitation 01 distri. <br />butlon systems and Improving farm <br />management to reduce contnbution of <br />total dissolved salts to the Colorado <br />River. The Crystal Geyser Unit, Utah. <br />is planned to collect and dispose of <br />saline water that penodlcally erupts <br />from an abandoned oil well beside the <br />Green River. The Las Vegas Wash Unit <br />consists 01 facilities for collection and <br />disposal of saline ground water from <br />Las Vegas Wash. <br /> <br />The Salinity Control Act also authorized <br />completion of planning reports on 12 <br />additional units In the Colorado River <br />Basin. <br /> <br />7 <br />