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Last modified
7/28/2009 2:28:34 PM
Creation date
10/1/2006 2:15:42 PM
Metadata
Fields
Template:
Weather Modification
Contract/Permit #
2003-01
Sponsor Name
Gunnison County, City of Gunnison, Crested Butte
Project Name
WM Evaluation Report
Title
The Development, Conduct and Evaluation of a Cloud Seeding Program for the Gunnison River Basin, CO During the 2003-04 Season
Date
8/1/2004
County
Gunnison
State
CO
Weather Modification - Doc Type
Reports
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<br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br /> <br />to begin seeding on January 30, 2003, even though the formal permit had not been <br />received. <br /> <br />The project was declared operational on February 1st, and the first seeding <br />operations occurred on February 3'd. The formal permit (permit # 2003-01) was also <br />approved by the Colorado Department of Natural Resources on February 3'd. This <br />permit is valid for a five year period (i.e. through April 15, 2007). This permit authorizes <br />NA WC to conduct winter (Nov. 15 - Apr.l5) cloud seeding operations using 18-20 silver <br />iodide cloud seeding generators to target the higher elevations (i.e. >9000' msl) of <br />Gunnison County. Seeding operations shall not be undertaken, or shall be suspended, if: <br /> <br />A. The National Weather Service forecasts a storm to produce unusually heavy <br />precipitation that could contribute to avalanches or unusually severe weather conditions <br />in the project area. <br /> <br />B. The Colorado Avalanche Center issues an avalanche forecast warning for avalanche <br />areas located in the target areas, or <br /> <br />C. The Director of the Colorado Water Conservation Board or the project sponsors order <br />suspension of seeding for any reason. <br /> <br />In addition. seeding is to be suspended at any time the snowpack water equivalents at <br />selected target SNOTEL sites exceed: 175% of average on Dec. 1st, 175% of average on <br />Jan. 1st, 160% of average on Feb. 1st, 150% of average on Mar. 1st and 140% of average <br />on Apr. 1st. <br /> <br />NA WC installed 18 could seeding generators for this first seeded season. Figure <br />3.1 shows their locations. Table 3-1 lists the names, latitude and longitude and elevation <br />information for these sites. The sites were placed at locations similar to those proposed <br />in the feasibility/design study (compare Fig. 2.11 with Fig. 3.1). <br /> <br />31 <br />
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