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<br /> <br />. <br /> <br />.... <br />l'V <br /><::> <br />-:: <br /> <br />. <br /> <br />. <br /> <br />INTRODUCTION (Continued) <br /> <br />In addition to including 2 more years of record, the major changes <br />in this report from the January 1975 report are as follows: (1) transfer- <br />ring that part of the future estimated depletions that actually occurred <br />during the 2 years to present depletions; (2) updating Part VIII "Colorado <br />River Salinity Control Program" in order to report on the progress of <br />investigations, planning, and construction of salinity control units as <br />required under Title II Section 206 of the Colorado River Basin Salinity <br />Control Act. Public Law 93-320; and (3) using a revised depletion schedule <br />for future conditions. <br /> <br />C. Cooperation <br /> <br />The major portion of this report was prepared by the Bureau of <br />Reclamation. The Geological Survey provided most of the basic data and <br />prepared a technical study on salinity in the Flaming Gorge Reservoir. <br />A continuing cooperative program betyeen the Bureau of Reclamation and <br />the Survey for the collection of streamfloy quality data and the exchange <br />of information has been in effect for a number of years. This cooperation <br />provides for the collection of data at stations other than basic data <br />stations maintained by the Geological Survey in order to obtain additional <br />data at key points in the basin. <br /> <br />In the Upper Basin, data are obtained at various points along the <br />river and in drains cooperatively yith the Geological Survey and other <br />agencies. Along the main stem belov Lees Ferry, data are obtained on a <br />regular basis at a netyork of stations that includes essentially all <br />significant diversions, surface return flows, and major river stations. <br />The Bureau of Reclamation is the lead agency of an ongoing task force <br />for coordinating the collection of other quality data in the Lower <br />Basin. Other members of the task force are composed of representatives <br />from the Geological Survey International Boundary and Water Commission, <br />and Environmental Protection Agency. <br /> <br />4 <br />