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<br />(.0 <br />1:- <br />M <br />'I"'i <br />(.:::.I <br />C::.i <br /> <br />August 1924 to ~26.41 in August 1954, or 53.81 cfs. This repr<'sents <br /> <br />depletion to the Conejos River and recharge to the aquifers and is <br /> <br />less than the average annual flow depletion of 64 cfs cited above. <br /> <br />It should be less because the flows during August are less than <br /> <br />average annual river flows. The Tipton study (page 9) ind.icated no <br /> <br />apparent increase in depletion of the San Antonio River. <br /> <br />The ~ipton report in Table II lists the net increase in irri- <br /> <br />gated acreage for the conejos and R~o Grande as 35,800 acres from <br /> <br />1936 to 1954. .The corresponsing consumptive use increase is esti- <br /> <br />mated at 35,800 acre-feet. However, the changes. in Clvailability of <br /> <br />water from irrigation wells permitted a change in cr.opping practices <br /> <br />and increased the crop consumptive use on previously irrigated lands <br /> <br />and explains the fact that the depletions in the San Luis Valley are <br /> <br />greater than accountable by the new lands alone. <br /> <br />The post-Compact delivery-departure changes to the period <br /> <br />1950 to 1967 are 34,400 acre:"feet for the conejos and 34,600 for the <br /> <br />Rio Grande, tota1.ing 69,000 Clcre-feet. However,only 5,900 acres <br /> <br />(16.5 percent) of the 35,800 acre net increase in irrigated acreage <br /> <br />from 1936 to 1954 was in the Conejos. <br /> <br />16.5 percent of 69,000 is <br /> <br />11,400 acre-feet, or some 23,000 acre-feet less than the Cleliveries <br /> <br />change to the Conej05 at Los Sauces. <br /> <br />The effect of changes in diversfons from the. San Antonio River <br /> <br />to Cove Lake are not considered in this analysis. <br /> <br />-7- <br />