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Figure 10. Firm Yield of Alignment 1 Reservoir (154,500 a� <br />160,000 <br />140,000 <br />w; 120,000 <br />a� <br />� 100,000 <br />.� <br />� 80,000 <br />.., <br />� 60,000 <br />�. <br />�, 40,000 <br />20,000 <br />0 <br />200 <br />400 <br />350 <br />300 w <br />250 � <br />� <br />200 : <br />a� <br />150 � <br />� <br />... <br />100 w <br />50 <br />0 <br />400 <br />Figure 10 shows that: <br />• Firm yield is directly related to diversion capacity, at least in the range of 240 to 380 cfs <br />because the storage capacity and legally available supply are generally not constraining <br />the magnitude of the yield, but the conveyance capacity is constraining. <br />• Storage-to-yield ratios are favorable, also an indication of a reliable water supply. (Future <br />studies of the project should explore constraints on the use of this supply resulting from <br />federal and state land management and environmental programs upstream and <br />downstream of the proposed diversion). <br />• Flows of up to 337 cfs could be available to the 15-Mile reach, for 77 days in the late <br />summer months, in the range of diversions explored here. For comparison, the 10,825 af <br />distributed over the same 77 days of late summer deliver a uniform flow of approximately <br />70 cfs to the 15-Mile Reach. <br />The excellent storage-to-yield ratios are possible because in some years, a great deal of water — <br />as much or more than the available reservoir capacity at the beginning of the year — passes <br />1 Conveyance capacities ranging from 240 cfs to 380 cfs were investigated for the larger reservoir <br />44 <br />AECOM 2�22�� o <br />220 240 260 280 300 320 340 360 380 <br />Diversion Capacity (cfs) <br />