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Types of Aircraft: None <br />Seeding Devices, Materials and Seeding Rates, etc.: <br />Not more than 16 manually operated generators and one remote controlled generators will be used, <br />depending upon wind directions affecting the target area. In addition one liquid propane (LP) generator <br />will be selectively used on warmer storms. The manually operated generators will use an acetone /silver <br />iodide solution with an emission rate of less than 7 grams per hour. The remotely controlled generator also <br />burns the acetone /silver iodide solution at a maximum rate of 28 grams per hour. <br />Description of how the project will be carried out: <br />The operational procedures to be used on the cloud seeding program, designed to achieve the stated <br />objective of increased snow pack, are to produce silver iodide crystals (which act as artificial cloud nuclei) <br />from the network of ground -based generators for diffusion by favorable wind flows into selected storm or <br />cloud types favorable for reasonable precipitation increases over the project area. An analysis of low-level <br />winds fields, cloud characteristics, stability parameters, terrain features and synoptic meteorological <br />features will determine the network of generators which will best seed the cloud system over the project <br />area for each situation and will provide a method for adjusting the network as new weather information <br />becomes available. Depending upon the established conditions, if the system is determined to be seedable, <br />generator operators are telephoned and given a time when their generator should be activated.. They might <br />also be given a termination time, or if not, called at a later time to terminate their seeding. Incoming data is <br />continually monitored during these periods and adjustments in generator operations are made as needed. <br />Seeding criteria for Winter Cloud Systems: <br />Cloud bases are at least 500 feet below the mean mountain barrier crest in the target area and are forecast to <br />become lower at the beginning of seeding. <br />Temperatures at the height 500 feet below the mountain crest within the target area are at -5 degrees <br />Centigrade (23 degrees F) or colder and are forecast to become colder that -5 C. <br />Wind directions and speeds from the surface to cloud -base are observed and forecast to favor the movement <br />of the crystals into the intended target area. <br />There are no stable regions or atmospheric inversions (which inhibit the ascension of the crystals) between <br />the surface and cloud base that would prevent the vertical dispersion of the crystals from the surface to at <br />least the -5 C (23 F) level or colder within the cloud system. <br />The temperature at approximately 10,000 feet (MSL) is warmer than -15 C (5 F). <br />Ref: 12, 16 <br />4. Indicate how the proposed project is designed to provide and offers promise of providing economic <br />benefit to the target area (applicable to commercial projects only), <br />A policy statement from the World Meteorological Organization (WMO) states that well designed and well <br />executed programs will have demonstrable results. Seeding programs in Colorado and Utah within similar <br />mountainous terrain, have indicated increases of approximately 5 to 15 percent. It would be expected <br />similar results can occur in this mountain target area. An additional increase in snow pack and water supply <br />will have multiple recreational, agricultural and industrial use for those within the target area and all the <br />downstream water users as well. <br />Ref: 2, 4, 6, 10, 13, 14 <br />