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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br /> <br />Background <br />The Price and San Rafael River Basins are located in east-central utah, <br />120 miles southeast of Salt Lake City, encompassing Carbon and Emery Counties. <br />The area is rich in carbon fuels (predominantly coal) and is a heavy producer <br />of electrical energy. <br /> <br />The Price and San Rafael Rivers and their tributaries flow through Mancos <br /> <br /> <br />Shale-derived soils. The Mancos Shale has long been considered the major <br /> <br /> <br />source of salinity in the Price and San Rafael River Basins. Historically, <br /> <br /> <br />the Price and San Rafael Rivers contribute 232,000 and 193,000 tons of salt <br /> <br /> <br />per year, respectively, to the Colorado River System. This translates to <br /> <br /> <br />21 and 18 mg/L, respectively, at Imperial Dam. Based on field studies and <br /> <br /> <br />salt water budgets, it has been determined that approximately 60 percent of <br /> <br /> <br />the salt loading comes from the agricultural area. <br /> <br />The Colorado River Salinity Control Act (Public Law 93-320) provides authority <br /> <br /> <br />for the u.S. Department of Agriculture (USDA) to participate in Colorado River <br /> <br /> <br />Basin Salinity Control investigations along with the Department of Interior. <br /> <br /> <br />Title II (section 203) directs the Secretary of Interior to cooperate with the <br /> <br /> <br />Secretary of Agriculture in carrying out research, demonstration projects, and <br /> <br /> <br />implementing on-farm improvements and farm management practices and programs <br /> <br /> <br />which will further the objectives of the Salinity Control Program upstream of <br /> <br /> <br />Imperial Dam on the Colorado River. <br /> <br />r - 6 <br />':'/ .'. ~ <br />l",- 0U <br /> <br />1-2 <br />