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<br />. <br /> <br />~ <br />o <br />c.n <br />{'.:! <br /> <br />.' <br /> <br />." <br /> <br />HISTORY OF WATER RESOURCE DEVELOPMENT (continued) <br /> <br />the act, studies shall not be undertaken of any plan for the impor- <br />tation of water into the Colorado River Basin from any other natural <br />river drainage basin lying outside the States of Arizona, California, <br />Colorado, New Mexico, and those portions of Nevada, Utah, and Wyoming <br />which are in the natural drainage basin of the Colorado River. <br /> <br />f. Direction to the Secretary to make reports of annual consumptive <br />use and losses of water from the Colorado River System after each <br />successive 5-year period beginning with the 5-year period starting on <br />October I, 1970. <br /> <br />D. Legal Aspects, Water Quality <br /> <br />Various water quality legislative acts have been passed by the Con- <br />gress of the United States and the Legislatures of the Basin States. <br />Discussion of four Federal acts that are of special significance to the <br />Colorado River Basin follows: <br /> <br />1. Water Quality Act of 19&5 and Related Developments <br /> <br />The Water Quality Act of 19&5, Public Law 89-234, amended the Federal <br />Water Pollution Control Act and established a Federal Water Pollution <br />Control Administration (now the EPA), to provide grants for research and <br />development, to increase grants for construction of sewage treatment works, <br />to require establishment of water quality criteria, and for other purposes. <br />Section 5 of this Act requires States to adopt water quality criteria <br />applicable to interstate waters or portions thereof within their boundaries <br />by June 30, 19&7. <br /> <br />Each of the seven Basin States proceeded with actions directed toward <br />establishment of water quality standards for interstate streams. Early in <br />the standards setting process, it became apparent to the States that <br />because of legal and institutional constraints combined with lack of <br />technical knowledge of salinity control and management, it would be very <br />difficult to establish numerical salinity standards on the Colorado River <br />which would be workable, equitable, and enforceable. The seven Basin <br />States subsequently developed water quality standards which did not include <br />salinity standards. <br /> <br />The "Seventh Enforcement Conference in the Matter of Pollution of the <br />Interstate Waters of the Colorado River and Its Tributaries" was held in <br />Las Vegas (February 15-17, 1972) and Denver (April 2&-27, 1972). <br /> <br />The conferees, (official representatives of the seven Basin States) <br />and the EPA, unanimously adopted conclusions and recommendations pertaining <br />to the salinity problems of the Colorado River. The conclusions and <br />recommendations were approved by Mr. William D. Ruckelshaus, Administrator <br />of the EPA in June 1972. The more significant conclusions were as <br />follows: <br /> <br />1& <br />