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<br />., ' <br /> <br />" <br /> <br />. <br /> <br />. <br /> <br />,( .. <br /> <br />a favorable environment, will grow into a snow flake. NA WC will use a seeding solution <br />composed of acetone, silver iodide, sodium iodide and paradichlorobenzene. This solution has <br />been shown to produce more effective seeding particles at warmer temperatures (i.e. about _100 <br />to -50C and to produce these crystals more quickly than pure silver iodide (Finnegan, 1999). <br />Each generator will consume 8 grams of silver iodide per hour of operation. Aerial seeding is not <br />proposed for this project. Figure 1 provides tentative locations ofthese generators. <br />The project is planned to operate from January 15 - April 30, 2002 during the first season <br />of operations and November 1 st through April 30th of the next four seasons. The latter period <br />represents the primary snowpack accumulation period. The month of April does experience some <br />snowmelt in the intermediate elevations but snowpack can actually increase at the highest <br />elevations. Table 2 demonstrates this situation based upon the average snowpack water contents <br />at four Natural Resources Conservation Service Snotel sites. <br /> <br />TABLE 2 CUMMULA TIVE AVERAGE SNOWP ACK WATER CONTENT (inches at the first of each month) <br /> <br />SITE NOV DEC IAN FEB MAR APR MAY <br />BUTrE (10,160' ) 1.2 3.6 6.4 9.5 12.6 15.7 7.6 <br />MC CLURE PASS 0.8 3.0 6.6 11.0 14.9 18.4 14.1 <br />(9500' ) <br />NORTH LOST TRAIL 1.0 4.0 7.2 10.8 15.0 18.2 13.2 <br />(9200' ) <br />SCHOFIELD PASS 3.6 9.2 14.4 20.3 27.6 35.0 38.3 <br />(10,700' ) <br /> <br />The high elevation snowpack helps extend the summer runoff. <br /> <br />4 <br />