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<br />.--- <br />:#?t. 0 t <br />'t/J9 ~ <br />c) <br /> <br />CHAPTER! <br /> <br />INTRODUCTION <br /> <br />This report presents the results of an inflow-outflow river budget <br /> <br />analysis for the Grand Valley area. The purpose of the analysis-was to <br /> <br />quantify the salt loading to the Colorado River as it passes through the <br /> <br />valley. The determination of the amount of salt loading through the valley <br /> <br />is a necessary first step in the evaluation of alternative salinity reduction <br /> <br />plans for the Grand Valley Unit in Colorado._ <br /> <br />Authorization <br /> <br />The Grand Valley Unit was authorized for construction- by the Colorado <br /> <br />:.'::\{J. <br /> <br />River Basin Salinity Control Act of 1974 (Public Law 93-320) as part of a <br /> <br />basinwide program for the enhancement and protection of the quality of water <br /> <br />available in the Colorado River for use in United States and the Repubiic of <br /> <br />Mexico. Title I of the Act, which was directed toward controlling the <br /> <br />salinity of river water below Imperial Dam for use in the United States and <br /> <br />the Republic of Mexico, authorized the construction of a desalting complex <br /> <br />and other measures to ensure acceptable salinity levels. Title II. which was <br /> <br />directed toward salinity control in the United States above Imperial Dam, <br /> <br />authorized the construction of the Grand Valley Unit and three other units as <br /> <br />the initial stage of the Colorado River Basin Salinity Control Project. It <br /> <br />also directed that planning reports be expedited on 12 additional units. A- <br /> <br />thirteenth unit has been added for study since the passage of tbe Act. <br /> <br />;;';;".:.> <br /> <br />I-I <br />