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<br />.' <br /> <br />PART I. INTRODUCTION <br /> <br />...... <br /><::> <br />o.j:>. <br />~.... <br /> <br />A. Authorization for Report <br /> <br />Th is is the tenth progress report on Qual ity of Water in the Colorado <br />River Basin. The directive for preparing this and the nine previous <br />reports is contained in four separate publ ic laws. Sect ion 15 of the <br />authorizing legislation for the Colorado River Storage Project (CRSP) and <br />participating projects, Public Law 485, 84th Congress, Second Session, <br />April 11, 1956, states, "The Secretary of the Interior is directed to <br />continue studies and make a report to the Congress and to the States of the <br />Colorado River Basin on the quality of water of the Colorado River.'1 <br /> <br />.' <br /> <br />A progress report to comply with Public Law 84-485 was in preparat ion <br />when the authorizing legislat ion for the San Juan-Chama Project and the <br />Navajo Indian Irrigat ion Project, Publ ic La', 87-483 became effect ive on <br />June 13, 1962. Sect ion 15 of this act states, "The Secretary of the <br />Interior is directed to continue his studieg of the quality of water of the <br />Colorado River system, to appraise its suitahility for municipal, domestic, <br />and industrial use and for irrigation in the various areas in the United <br />States in wh ich it is used or proposed to be used, to est imate the effect <br />of addit ional developments involving its storage and use (whether hereto- <br />fore authorized or contemplated for authorization) on the remaining water <br />available for use in the United States, to study all possible means of <br />improving the quality of such water and of alleviating the ill effects of <br />water of poor quality, and to report the results of his studies and esti- <br />mates to the Eighty-Seventh Congress and every 2 years thereafter.11 <br /> <br />A few weeks later Public Law 87-590, which authorized the Fryingpan- <br />Arkansas Project, was passed with a similar sect ion. pertaining to qual ity <br />of water reports. This public law, however, stipulated that January 3, <br />1963, would be the submission date for the initial report and that the <br />reports should be submitted every 2 years thereafter. <br /> <br />Section 206 of Title II, Public Law 93-320, Colorado River Basin <br />Salinity Control Act directs the Secretary of the Interior to sobmit <br />every 2 years to the President, the Congress, and the Adviso["y Council, <br />a progress report on the Colorado River salinity control program and <br />spec if ies that it may be included in the Qual ity of Water, Colorado River <br />Basin Biennial Report. <br /> <br />. <br /> <br />Noth ing in th is report is intended to interpret the provls lon~ of the <br />Colorado River Compact (45 Stat. 1057), the Upper Colorado River Bas in <br />Compact (63 Stat. 31), the Water Treaty of 1944 with the United Mexican <br />States (Treaty 'Series 994; 59 Stat. 1219), the decree entered by the <br />Supreme Court of the United States in Arizona vs. California, et al. 1375 <br />U.S. 340), the Boulder Canyon Project Act (45 Stat. 1057), the Boulder <br />Canyon Project Adjustment Act (54 Stat. 774; 43 U.S.C. 618a), the CRSP Act, <br />(70 Stat. 105; 43 U.S.C. 620), or the Colorado River Basin Project Act (82 <br />Stat. 885; 43 U.S.C. 1501). <br /> <br />5 <br />