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<br />OPERATIONAL PROCEDURE <br /> <br />The weather modification program for the Grand Mesa area <br /> <br />utilized ground-based generators. <br /> <br />Eleven arc-type silver <br /> <br />iodide generators were placed at various sites around the <br />project -- sites chosen primarily on the basis of expect- <br />ed windflow patterns associated with precipitation-bearing <br />storms and topography, but affected to some extent by <br /> <br />availability of generator operators. <br /> <br />The generators were <br /> <br />operated by local residents who were selected and trained <br />in our procedures by our company rcprescntati vc. Genera- <br /> <br />tors for the Grand Mesa project were emp] aced at or nea.r <br /> <br />the following locations: <br /> <br />Broughton Ranch <br />(20 mi NW of Delta) <br /> <br />Palisade <br /> <br />Collbran <br /> <br />P aoni a <br /> <br />De Beque <br />Delta <br /> <br />Nucla <br />Loma <br /> <br />Rogers Mesa <br /> <br />V 1M Ranch <br />(10 mi HE Gateway) <br /> <br />Whitewater <br /> <br />Silver iodide is the nucleating agcnt used in this method <br /> <br />of cloudseedinl!;. <br /> <br />Two models of the arc-type I!;enerator <br /> <br />were employed -- one having an output of "pproximately <br />0.5 grams of silver iodide per hour, and tIle other with <br />an output of approximately 2 grams per hour. Within the <br />generators the silver iodide is vaporized under intense <br />heat into microscopic crystals and dispersed outside of <br />the generator into the natural air currents. The <br /> <br />Page Z <br />