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<br />In general, the four or five subtarget areas selected <br /> <br />should be as representative as possible of the <br /> <br />entire basin including geographical location, watershed <br /> <br />characteristics, exposure or orientation, and climatology. <br /> <br />For improved evaluation opportunities and minimized <br /> <br />'<I. <br /> <br />seeding contamination, areas should be well separated <br /> <br />and where possible, located toward the eastern <br /> <br />extremity of the basin as recommended by Colorado <br />state University in their design study for the <br /> <br />Pilot Project 1/. Statistical comparisons of u.s. <br />Geological Survey streamgaging stations already <br />investigated are also critical in selection of the <br />subareas and possible control areas 2/. <br /> <br />2. Operating Criteria and Procedures. - Operations <br />will be designed to consider storm structure and <br /> <br />interactions with the mountain mass. Procedures will <br /> <br />be based upon expected dispersal of seeding materials <br /> <br />and the calculated precipitation growth and fallout <br /> <br />trajectory. <br /> <br />1/ Grant, L. 0., ed., "An Operational Adaptation <br />Program for the Colorado River Basin," Interim Report, <br />Contragt No. 14-06-D-6467, Colorado state University, <br />Fort Cg11ins, Colorado, Oct. 1969. <br /> <br />~ <br /> <br />2/ More1-Seytoux, H. J. "Suitability of Basin to Weather <br />Modification and Statistical Evaluation of Attainment." <br />Final Report, Contract' No. 14-06-D-6007, Colorado State <br />University, Fort Collins, Colorado, July 1968. <br /> <br />i. <br />v <br /> <br />20 <br />