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<br />OOilllo8 <br /> <br />The three sets of simulations consisted of: <br /> <br />1. Base case. - No enhancement and present Upper Basin depletion schedule, <br />leveling off at 5.8 million acre-feet by 2040. <br /> <br />2. UBS (U er Basin Scenario) - snow ack enhancement. - Upper Basin <br />depletions increased from 5.8 million 1 acre-feet in 2040 to reach <br />5.3 million acre-feet by 2070. Lee Ferry objective release remains at <br />8.25 million 11 acre-feet. <br /> <br />3. LBS (Lower Basin Scenario) - snowpack enhancement. - Same Upper Basin <br />depletion schedule as above. Lee Ferry objective release increased <br />to 9.1 million acre-feet. This supplies 1.4 million acre-feet of the <br />Mexican treaty delivery, plus one-half of the 400,000 acre-foot deficiency <br />necessary to supply the remainder of the delivery and 300,000 acre-feet in <br />conveyance losses. This 1.5 million acre-feet was added to the assumed <br />Upper Basin delivery of 7.5 million acre-feet to arrive at an objective <br />release of 9.1 million acre-feet. <br /> <br />The enhanced hydrology did not take into consideration any suspension criteria; <br />thus, the hydrology was increased by the full potential each year, whether it <br />was a wet or dry year. In 'normal operation, cloud seeding would be suspended <br />under high snowpack conditions. This would result in a small decrease in <br />the average enhancement. <br /> <br />The comparison of the two scenarios relative to the base condition for <br />the period of full enhancement (1991-2072) is as follows: <br /> <br />1/ Nothing in this report is intended to interpret the provlslons of the <br />Colorado River Compact (45 Stat. 1057), the Upper Colorado River Basin <br />Compact (53 Stat. 31), the Water Treaty of 1944 with the United Mexican <br />States (Treaty Series 994, 59 Stat. 1219), the decree entered by the Supreme <br />Court of the United States in Arizona vs. California, et al. (375 U.S. 340), <br />the Boulder Canyon Project Act (45 Stat. 1057), the Boulder Canyon Project <br />Adjustment Act (54 Stat. 774; 43 U.S. Code 518a), the Colorado River Storage <br />Project Act (70 Stat. 105; 43 U.S. Code 520), or the Colorado River Basin <br />Project Act (82 Stat. 885; 43 U.S. Code 1501). <br /> <br />10 <br />