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<br />. <br /> <br />. <br /> <br />. <br /> <br />o <br />w <br />~ <br /><0 <br /> <br />CHAPTER I <br /> <br />INTRODUCTION <br /> <br />Lower Colorado Basin, thereby assisting the States in meeting salinity <br /> <br />standards while the Upper Basin States continue to develop their <br /> <br />compact-apportioned water. <br /> <br />The objective of the unit investigation was to determine the feasi- <br /> <br />bility of eliminating or reducing salt contributions to the Big Sandy <br /> <br />River. The Big Sandy River Basin contributes an average of 164,000 tons <br /> <br />of salt annually to the Green River and subsequently to the Colorado <br /> <br />River. <br /> <br />Most of the salt comes from deep percolating irrigation water <br /> <br />which dissolves minerals from saline bedrock as it flows toward the Big <br /> <br />Sandy River. <br /> <br />The study included determination of the salt loading mechanism, <br /> <br />development of alternative methods to reduce the salt contributions, <br /> <br />identification of beneficial uses of the saline water, evaluation of <br /> <br />alternatives, and selection of a recommended plan. The recommended plan <br /> <br />will be studied in detail prior to construction. <br /> <br />Authorization <br /> <br />Planning studies on the Big Sandy River Unit were conducted in <br /> <br />accordance with the Colorado River Basin Salinity Control Act of June <br /> <br />1974 (Public Law 93-320) and the Federal Water pollution Control Act <br />Amendments of October 1972 (Public Law 92-500).1 <br /> <br />The unit was originally authorized for study by the Salinity Con- <br /> <br />trol Act a8 part of a basinwide program of works for the enhancement and <br /> <br />lAmended by the Clean Water Act of 1977 (Public Law 95-217). <br /> <br />2 <br />