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<br />~ " <br /> <br />I <br /> <br />~ . ..l <br /> <br />, <br /> <br />, <br /> <br />-1z..v1cSO~ <br />1 <br />- <br /> <br />3-15-91 <br /> <br />Department of Natural Resources <br />Colorado Water Conservation Board <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 Party Water 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 - Lon~.::Range opera~g~_~..._-- <br />e V'\. ~ CJo-'\^ ~~~_ S \~~-<'l ' A.c...-.Jf" A ~ <br />Compact Apportionment ~~~ ~~~ <br /> <br />Lower Colorado River Basin States: 7.500.000 af per annum <br />or 75.000.000 af per 10 year of consumptive use <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 />~1-' The Upper Basin States do not agree with this assumption <br /> <br />4035E* <br />