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<br />I <br />. <br />I <br />I <br />I <br />t <br />t <br />t <br />t <br />t <br />t <br />. <br />. <br />. <br />. <br />. <br />t <br />t <br />t <br />. <br />. <br />. <br />. <br />I <br />I <br />, <br />I <br />I <br />I <br />I <br /> <br />more not.seeded seasons. so that normal seasonal variability of the natural <br />precipitation within the target and control is reasonably reflectedflncluded. Clearly, the <br />more representative (inclusive) the base period is of natural temporal and spatial <br />variability within and between the target and control areas, the better the mathematical <br />relationship will perform in ensuing analyses. <br /> <br />Prior and Current SeedinQ Proiects in Colorado <br /> <br />To determine truly not-seeded regions and time periods, a comprehensive <br />search was conducted to determine the locations and seasons of operation for prior <br />seeding projects in Colorado. This important task proved to be much more time <br />consuming and elusive than envisioned. Records from many sources were obtained, <br />reviewed and combined to assemble a history of previous seeding activities, Table 1 <br />lists the prior and current seeding projects in Colorado, along with information <br />regarding their period of operation. Figure 2 shows the target areas for the projects in <br />Colorado. The various information sources used in this phase are shown in Appendix <br />A. <br /> <br />Ca!. Yr. <br /> <br />1965-69 <br />1965 <br /> <br />1965-1970 <br />1965-70 <br />1965-70 <br />1965-66 <br />1966. 68 <br />1970-75 <br />1971-72 <br />1972-77 <br />1975 <br />1975-76 <br />1976 <br />1977 <br />1977 <br />1977 <br /> <br />TABLE 1. <br /> <br />Winter Season Cloud Seeding Operations in Colorado since 1965 <br /> <br />Pmje('( or Operator Location <br /> <br />Monlhs affected <br /> <br />Park Range <br />Monarch Pass <br /> <br />Park Range <br />Monarch Pass. <br />Wolf Creek Pa'iS <br /> <br />JFM <br /> <br />Climax I <br />Climax I I CO cenlral mts <br />Water Resources Grand Mesa <br />Aspen Ski Aspen ski area <br />Wolf Creek Pass San Juan Mts <br />Colorado R. Rasin PP San Juan Mts <br />Water Resources Grand Mesa <br />Colorado State LJ. Climax <br />Western Wx SW San Juan <br />Water Resources Grand Mcsa <br />Western Wx SW. SE San Juan <br />Western Wx SW San Juan <br />CO Int. Corp. N. Front Range <br />Western Wx Central CO - <br />Climax area <br /> <br />JFMA OND <br />JFMA <br />JFMAM ND <br /> <br />JFMA <br />JFMA <br />FMAM <br /> <br />Dee <br />JFMA <br />JFMA <br />FMAM ND <br />FMAM ND <br />FMAM <br /> <br />, <br />