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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />1128 <br /> <br />EXHIBIT A <br /> <br />HYDROLOGY DATA <br /> <br />A-l DEPLETION STUDY COMPARISONS <br />This chart indicates the estimated depletions above Sioux City for the <br /> <br />period 1972-2040. The depletions used in the current study have recog- <br /> <br />nized all anticipated depletions set forth in the MRB Framework Plan <br />except portions of the private irrigation developments not supported <br /> <br />by storage facilities. <br /> <br />A-2 SYSTEM NATURAL INFLOW - EASTERN DIVISION <br />This bar graph shows the actual system natural inflow in million acre- <br />feet measured at Sioux City by years for the period 1898-1972. <br /> <br />A-3 NET ANNUAL ENERGY - WESTERN DIVISION <br /> <br /> <br />The bar chart titled "Western Division Net Annual Energy" is a compari- <br /> <br /> <br />son of actual system generation from natural inflow versus predicted <br /> <br /> <br />long-term average generation from hydrology studies. The exhibit shows <br /> <br />actual system generation experienced during the 6 years since Yellowtail <br /> <br />has been in full production slightly exceeds the predicted long-term <br />average. <br /> <br />41 <br />