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<br />'\ <br /> <br />- <br />/,:c~,\ ... ;~ <br />t}',':::;-:idrtment of Natural Resour~::':s <br />Colorado Water Conservation Board <br /> <br />V'-'f <br /> <br />Iqq IlJv f <br /> <br />Colorado River Basin <br />Basic Facts <br /> <br />The following information reflects a very simplified <br />presentation of Colorado River Basin data and facts and does <br />not necessarily reflect the final position of the State of <br />Colorado regarding these matters. <br /> <br />This presentation does not waive any position Colorado may <br />take in the future concerning any aspect on the interpretation <br />of the Law of the River. <br /> <br />Law of the River <br /> <br />1922 - Colorado River Compact <br />1928 - Boulder Canyon Project Act <br />1929 - California Limitation Act <br />1931 - California Seven Water Party Agreement <br />1940 - Boulder Canyon Project Adjustment Act <br />1944 - Mexican Water Treaty <br />1948 - Upper Colorado River Basin Compact <br />1956 - Colorado River Storage Project Act <br />1964 - Arizona v California - U.S. Supreme Court <br />1968 - Colorado River Basin Project Act <br />1970 - Long-Range Operating Criteria <br /> <br />Compact Apportionment <br /> <br />Lower Colorado River Basin States: 7.500.000 af of <br />75.000.000 per 10 yr. consumptive use per annum <br /> <br />California <br />Arizona <br />Nevada <br /> <br />4.400.000 af <br />2.800.000 af <br />300.000 af <br />7.500.000 af <br /> <br />Upper Colorado River Basin States: 7.500.000 af* of <br />consumptive use per annum; additionally the Upper Basin <br />States will not deplete the flow of the Colorado River at <br />Lee Ferry below 75 million af in any 10 year period. <br /> <br />Arizona <br />Colorado <br />New Mexico <br />Utah <br />Wyoming <br /> <br />51. 75% <br />11.25% <br />23.00% - <br />14.00% - <br /> <br />50.000 af <br />3.079.000 af <br />669.000 af <br />1. 368.000 af <br />833.000 af <br />6.000.000 af <br /> <br />* 1988 Bureau of Reclamation Hydrologic Determination: <br />Physical water supply available to Upper Basin States is only <br />6.000.000 af and this assumes that the Upper Basin is <br />responsible for one-half of the Mexican Treaty obligation. <br />The Upper Basin States do not agree with this assumption <br /> <br />4035E* <br />