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Department of Natural Resources 11/$/95 <br />Colorado Water Conservation Board <br />Colorado River Basin <br />Basic Facts <br />The following information reflects a very simplified presentation of Colorado River Basin <br />data and facts and does not necessarily reflect the final position of the State of Colorado <br />regarding these matters. <br />This presentation does not waive any position Colorado may take in the future concerning <br />any aspect on the interpretation of the Law of the River. <br />Law of the River <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 />1972 - Colorado River Basin Salinity Control Act <br />1973 - International Boundary and Water Commission, USA and Mexico Minute 242 <br />Compact Apportionment <br />Lower Colorado River Basin States: 7,500,000 af per year or 75,000,000 af of <br />consumptive use per 10 yrs. <br />California 4,400,000 af <br />Arizona 2,800,400 af <br />Nevada 300,000 af <br />7,500,000 af <br />Upper Colorado River Basin States: 7,500,000 af* of consumptive use per annum; <br />additionally the Upper Basin States will not deplete the flow of the Colorado River at Lee <br />Ferry below 75 million af in any 10 yeaz period. <br />Arizona 50,000 af <br />Colorado 51.75% - 3,079,000 af <br />New Mexico 11.25% - 669,000 af <br />Utah 23.00% - 1,368,000 af <br />Wyoming 14.00% - 833.000 af <br />6,000,000 af