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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 /> <br />to the active 4,550 AF pool; the reservoir water surface would normally <br /> <br />fluctuate between this and lower elevations. During the PMF, the water <br /> <br /> <br />surface could reach the high water line (H\lL) elevation of 5,350 ft msl if <br /> <br /> <br />the reservoir's active storage was full prior to the storm. <br /> <br />Additional evaluations were made to determine if less storage would be <br /> <br /> <br />required if CBT, \lindy Gap, or new direct-flow ("free") waters were also <br /> <br /> <br />stored in the reservoir. Storing CST waters provided no deficit reduction <br /> <br /> <br />benefit. CBT water already has adequate storage in its own system; storing <br /> <br />these waters in the City'S reservoir only results in displacing stored <br /> <br /> <br />Transfer Decree water with CBT water. <br /> <br />\lindy Gap does have storage in the CBT system, but only on an as-available <br /> <br /> <br />basis. By reserving a small portion of the City's reservoir (about 300 AF) <br /> <br />for \lindy Gap waters, the reservoir capacity required to eliminate the <br /> <br />deficit can be reduced by 200 AF to a 4,350 AF reservoir. <br /> <br />I <br />I <br /> <br />A summary of average water supplies by source for this Plan Element is <br /> <br />presented in Table 4-2. Increasing the active capacity of Green Ridge <br /> <br /> <br />Glade to 4,550 AF results in increased usage of stored water and decreased <br /> <br /> <br />usage of \lindy Gap water. Also, the additional storage capacity reduces <br /> <br /> <br />Transfer Decree spills by 1,398 AFYj only 50 percent of the City's storable <br /> <br /> <br />Transfer Decree water is left in the stream, compared to 91 percent with <br /> <br /> <br />the existing 600 AF reservoir. <br /> <br />I <br />I <br /> <br />Cost estimates for this Plan Element are summarized in Table 4-6. These <br /> <br /> <br />costs are based on modifying the existing earth dam to provide a total <br /> <br /> <br />storage capacity of 5,050 AF. The cost estimate includes associated <br /> <br /> <br />excavation, grading, structures, contingencies, and engineering design and <br /> <br />construction. Also included are the costs of acquiring approximately 20 <br /> <br /> <br />acres of private land and construction associated with relocating the road <br /> <br /> <br />along the west side of the existing reservoir. Detailed information on the <br /> <br /> <br />cost estimate made for the enlargement of the dam at this site is presented <br /> <br /> <br />in the Technical Appendix. <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />4-21 <br />