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<br />SAN JUAN OPERATIONS SUMMARY REPORT <br /> <br />The program in the San Juan mountains was delayed from'its original <br />intended beginning of February 1, 1977 to February 15, 1977, due to a delay <br />in procuring the funding. On February 15th thirteen of the generators were <br />operational, eleven on the east side of Wolf Creek Pass and two on the west <br />side. The five additional generators under construction were completed and <br />made operational by the 24th as silver iodide solution became available. The <br />program operated uninterrupted until closedown on May 15, 1977. <br /> <br />A total of fourteen operational episodes was declared during the program's <br />duration. The detail of each individual episode is presented in Table I. All <br />episodes were seeded as the design and permit for a randomized program were <br />amended by The Department of Natural Resources due to the emergency conditions <br />presented by the drought situation. This decision was implemented on <br />February 26, 1977. <br /> <br />Figure 1 portrays the total hours each generator operated during the <br />program. The range varied from a low of 70 hours at Romeo to a high of 224 <br />hours at Pagosa Pines, four miles south of Pagosa Springs. This figure also <br />shows the percentage of episodes individual generators operated in during <br />the program. This varied from a low of 36% in the southeast portion of the <br />target to a high of 79% in the southwest portion of the target area. <br /> <br />Figure 2 shows the status of the snowpack on February 1, 1977 in terms <br />of the water content as a percent of normal. Low elevation survey sites did <br />not have a snowpack. High elevation stations were generally about 25% of <br />normal. <br /> <br />Figure 3 shows the status of the water content of the snowpack on <br />March 1, 1977. With another month of below normal precipitation the snowpeck <br />remained at about 25% of normal. <br /> <br />Figure 4 shows the snowpack status as of April 1, 1977. Precipitation <br />remained well below average for the month but the high mountain survey loca- <br />tions showed an increase in snowpack to near 33% of normal. <br /> <br />Figure 5 shows a tremendous change in general snowpack conditions with <br />almost all but a few high elevation stations indicating no snowpack as pre- <br />cipitation continued to be below normal and temperatures above normal. It <br />is interesting to note that near the summit of Wolf Creek Pass the snowpack <br />did actually increase by about four percent during this period. To contrast <br />