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<br />j <br /> <br />" <br />'\ <br /> <br />Graph 7 is a year by year plotting of energy generated at Glen <br />Canyon from our study in which we assume consumptive use requirements <br />downstream from Hoover to be 7.7 maf, Glen Canyon power plant is <br />operated at 80% efficiency and Hoover at 70% efficiency. The difference <br />between this graph and Graph 1 is the efficiency assumed at Hoover. <br />Overlaying Graph 7 over Graph 1 shows the effect on Glen Canyon <br />generation of a lower efficiency of operation at Hoover. <br /> <br />Graph 8 shows the energy creditable to Glen Canyon if it is assumed <br />that Glen Canyon energy is used to make whole Hoover Basic Firm com- <br />puted at 83% efficiency but Hoover is operated in the study at 70% efficiency <br />and shortages are adjusted to 83% efficiency. Overlaying Graph 8 over <br />Graph 3 indicates the effect of operating efficiencies at Hoover and shows <br />that an artificial adjustment is not equivalent to actual operation at the <br />higher efficiency. <br /> <br />Graphs 7 & 8 illustrate the point made in the last part of item 2 on <br />pages 11 and 12 of Mr. Goslin's report. <br /> <br />The effects of the items 1 and 2 of Mr. Goslin's report for the 26 years <br />studied are indicated by the Une graphs on the 11" x 17" sheet. Line AA is <br />the energy generation at Glen Canyon from our studies 25.4 -7.7 - 30 with <br />Hoover operated at various efficiencies. Line BB is the energy generation <br />at Glen Canyon from our studies 25.4-8.5 - 30 with Hoover operated at <br />various efficiencies. The only difference between the studies represented <br />by lines AA and BB is the quantity of assumed downstream requirements. <br />Line CC is the energy creditable to Glen Canyon under the Bureau's formula <br />wherein the Upper Basin makes whole Hoover basic firm computed at 83% <br />efficiency. This line reflects, for efficiencies of Hoover generation in the <br />system less than 83%. the adj ustment of shortages in Hoover basic firm <br />to 83% and actual generation at Hoover in excess of basic firm. Line DD <br />i8 similar to line CC except that the same system operation is compared <br />with Hoover basic firm computed at 70% efficiency. <br /> <br />, <br /> <br />:.:.;:. <br /> <br />-17- <br />