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<br />W <br /><!:J <br />o Figure 15 summarizes current information on relative cost-effectiveness <br />Wand salt reduction at Imperial Dam for all Interior projects. The projects <br />are arranged on a unit and cumulative salt reduction scale from the most <br />to the least cost-effective projects. Table 1, on p. 11, quantifies and <br />displays the cost-effectiveness figures used on Figures 15 and 16. <br /> <br />Fil'iure 16 also summarizes relative cost-effectiveness on salt reduction <br />at Imperial Dam for all USDA projects. The units are sorted on a unit <br />and cumulative salt reduction scale fro~ the most to the least favorable <br />in terms of cost-effectiveness. <br /> <br />Figure 17 displays current implementation schedules used for the CRSS <br />prOjections assembled by scenarios. <br /> <br />Fi gure 18 summa ri zes the target load requi r'ements for the base case and the <br />scenario assumptions needed to meet the salinity standard at Imperial Dam <br />under future cOnditions. The target load and remaining load removal require- <br />ments were derived from the projections of salinity at Imperial Dam for the <br />five alternative scenarios shown on figure 14. The cumulative salt load <br />reduction effects of each scenario are shown resulting in a sequential <br />lowering of the target load requi rements on a time scale. For example, <br />implementation of all scenario 2 units will meet the standard and target <br />load requirements until 1996. Likewise, implementation of all scenario 5 <br />units will maintain the standard and satisfy all load requirements through <br />the year 2020. <br /> <br />Figure 19 is a display of the potential buildup of load removal for <br />scenario 2 projects to meet the target load requirement curve. Note the <br />appa rent 1 ead tdme and load remova 1 in excess of requi rementsfor the three <br />projects in meeting the target curve before 1998. However, at least 5 years <br />lead time is needed before project effects are fully transferred to <br />Imperial Dam. After 1998, additional salinity control to scenario 2 units <br />win be needed to meet the increasing target load requirements. <br /> <br />40 <br /> <br />1 <br />,~ <br /> <br />^/ <br /> <br />",1,',1 <br />1 <br />,. <br /> <br />A <br />;: <br /> <br />:_\ <br />;i <br />1 <br />-~ <br />'1 <br /> <br />".;- ;'- <br />