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<br />003291 <br /> <br />'. <br /> <br />The study was run analyzing 15 traces of indexed sequen~ial <br />hydrology which were imposed on each of the three alternatives. <br />This was done with sequence No. 1 starting with Water Year 1983 <br />being made equivalent to historical Water Year 1906. Then, <br />the balance of the years 1984-2072 was equated with 1984 <br />equal to 1907, and so on until historical year 1978 data <br />was used. Then, the historical year 1906 was reinserted for <br />the projected future year, and so on until the historical <br />year 1922'was reached, equivalent to year 2072. Sequence No. <br />2 jumps ahead 5 years, with 1983 being made equivalent to the <br />historical year 19l1, and then the subsequent years being <br />handled the same as in Sequence No. l; The additional water <br />from the cloud seeding program was assumed to be available <br />starting in the year 1991 and every year thereafter through <br />2072. <br /> <br />Cowan referred to a chart, the Lake Mead surplus strategy <br />curve, which showed, at four different points in time, the system <br />storage at which surplus would be declared for deliveries <br />from Lake Mead. The year zero was equated to the year when <br />CAP first comes on line. In that year, when there is a total <br />vacant space in system reservoirs of 7.5 maf or less then <br />surplus would be declared. This level of vacant storage space <br />was reduced on a straight line basis from year 0 to year 0 + <br />5, at which point the storage space level at which surplus would <br />be declared would be 6.5 maf. Another straight line then was <br />extended to 0 +30 years, to 6.0 maf of vacant space in re- <br />servoirs, above which surplus would be declared. Cowan stated <br />that operating within this zone gives a 50 percent probability <br />that spills would occur within the succeeding two years. <br /> <br />CREST Program Benefits <br /> <br />John Lease, USBR, presented the results of the CREST <br />Program benefits, that were computed through the CRSS studies. <br />This covered both the demonstration stage, and the succeeding <br />operational stage. The analysis was predicated upon 340,000 <br />acre-feet per year being added to the Colorado River system <br />during the demonstration stage and l.4 million acre-feet per <br />year being added during the operational stage in the Upper <br />Colorado River Basin. A number of parameters were analyzed <br />to show results from the augmentation, and Lease distributed <br />a tabulation "CREST STUDY RESULTS", a copy of which is <br />attached, which presents results in terms of annual average <br />changes in the parameters. The more significant parameters <br />may be briefly summarized in as follows: <br /> <br />l. Increase in total basin hydroelectric power-l.72 <br />billion kilowatt hours per yearl <br /> <br />C-32 <br /> <br />:;j "'~ <br />