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<br />office space and weather data, costs for that equipment could <br />be eliminated. <br /> <br />Elements of the seeding program are shown in Figure 3.9. <br />Possible ground-based seeding locations are indicated by circled <br />XiS. This ground~based seeding network consists of about <br />40 seeding units and has the capability to affect the Salt <br />and Verde River drainages under a variety of wind conditions. <br />As was mentioned earlier, the seeding units should use the <br />ammonium perchlorate additive to the silver iodide-ammonium <br />iodide solution. Several aerial seeding tracks are indicated. <br />Possible mountaintop seeding locations for the Verde River <br />drainage are also shown (large, solid dots). <br /> <br />Program costs have been estimated separately for each <br />of the possible designs. The costs are listed in Table 3.6. <br />These costs are for a seeding program that would affect both <br />the Salt River and Verde River drainages. Since only the <br />Salt River drainage has hydroelectric facilities, seeding <br />program costs have also been estimated for seeding in that <br />drainage separately. Costs for the Salt River drainage are <br />listed in Table 3.7 and are provided for both a ground-based <br />seeding program and a program utilizing both ground-based <br />and aerial seeding. As was mentioned above, the latter program <br />would be required to effectively seed the lower Salt River <br />drainage. <br /> <br />3-29 <br />