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<br /><, <br /> <br />.. <br /> <br />figure 4.1. Holroyd used digital terrain information to position 55 seeding devices for efficient seeding <br />coverage for a wind direction of240 degrees (used in figure 4.1) and separately for winds of 360 degrees. <br />The predominant wind direction during winter storms possesses a westerly wind component for a large <br />proportion of most storm durations (wind roses developed and available from Randolph Borys, director <br />of the Storm Peak Laboratory). <br /> <br /> <br />Figure 4.1. - Sample seeding device placement in the Headwaters Region for 240 degree winds <br />(adapted from Holroyd's unpublished Reclamation memorandum, 2000). <br /> <br />Seeding device numbers and placement may be impacted by the presence of large wilderness areas on <br />both, the west and east barriers of the Headwaters Region. The Holroyd seeding device placement in <br />figure 4.1 does not include some high-elevation areas because of terrain limitations wher~ the 9000-foot <br /> <br />25 <br />