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<br />I <br /> <br />I <br /> <br />Chapter I <br /> <br />I <br /> <br />Introduction <br /> <br />I <br /> <br />The Price and San Rafael River Basins are located ln east-central Utah, <br /> <br />120 miles southeast of Salt Lake City, encompassing Carbon and Emery Counties. <br /> <br />I <br /> <br />[he area is rich in carbon fuels (predominantly coal) and is a heavy producer <br /> <br />I <br /> <br />of electrical energy. <br /> <br />The Price and San Rafael Rivers <br /> <br />and their tributaries flow through Mancos <br /> <br />I <br /> <br />shale-derived suils. <br /> <br />The Mancos <br /> <br />Shale has lung been considered the major <br /> <br />I <br /> <br />suurce of salinity in the Price and San Rafael River Basins. Historically, <br /> <br />the Price and San Rafael Rivers contribute 232,000 and 193,000 tons of salt <br /> <br />I <br /> <br />per year, respectively, to the Colorado River System. This translates to 21 <br /> <br />I <br /> <br />and 18 Mg/L, respectively, at Imperial Dam. <br /> <br />Based upon field stud ies and sal t water budgets it has been determined that <br /> <br />I <br /> <br />approximately 60 percent of the salt loading comes from the agricultural area. <br /> <br />I <br /> <br />The Colorado River Salinity Control Act (Public Law 93-320) provides authority <br /> <br />I <br /> <br />for the U.S. Department of Agriculture (USDA) to participate in Colorado River <br /> <br />Basin Salinity Control investigations along with the Department of Interior. <br /> <br />I <br />I <br /> <br />Title II (section 203) directs the Secretary of Interior to cooperate with the <br /> <br />Secretary of Agriculture in carrying out research, demonstration projects, and <br /> <br />implementing on-farm improvements and farm management practices and programs <br /> <br />I <br /> <br />which will further the objectives of the Salinity Control Program upstream of <br /> <br />Imperial Dam on the Coloradq River. <br /> <br />I <br /> <br />t:'i /' , <br />"~,I, C'. <br />'..4 _J- '" <br />.' oJ,' <br />... <br /> <br />I <br /> <br />I-I <br /> <br />I <br />