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EXHIBIT K <br /> 6.4.11 EXHIBIT K - Climate <br /> (A) Climate Summary <br /> The West Side Placer is situated in a cold semi-arid climate,classified as BSk in the Koppen climate classification <br /> (see Map K.1). <br /> Annual precipitation ranges from 7 to 9 inches,with significant variability from year to year,leading to more dry years <br /> than those with above-average precipitation. Temperature fluctuations are substantial,attributed to the high elevation and <br /> dry air,allowing for rapid radiation exchange. During winter,cold air outbreaks move swiftly from northwest to southeast, <br /> causing extreme minimum temperatures.While extreme storms can occur in winter,they most severely impact ranch <br /> operations in late winter and spring. <br /> Daytime winds tend to be stronger than nighttime winds,and occasional strong storms may bring brief periods of high <br /> winds,reaching gusts of over 50 mph. The growth of native cool-season plants typically begins around April 15 and <br /> continues until about July 15. Some greening of cool-season plants may occur in September if moisture is available. <br /> Key climatic statistics for the region include: <br /> Frost-free period(average): 121 days <br /> Freeze-free period(average): 132 days <br /> Average precipitation: 7 to 9 inches <br /> Average air temperature: 5.56 degrees Celsius. <br /> (B) Maps <br /> The following maps have been prepared to show the different climate factors at the West Side Placer Project <br /> 1. 6.4.11 EXHIBIT K- Climate:Koppen Climate Zones 78 <br /> 2. 6.4.11 EXHIBIT K- Climate:Average Temperature 79 <br /> 3. 6.4.11 EXHIBIT K- Climate:Precipitation 80 <br /> 4. 6.4.11 EXHIBIT K- Climate:Solar 81 <br /> 5. 6.4.11 EXHIBIT K- Climate: Wind 82 <br /> 79 <br /> HARDROCK/METAL MINING REGULAR(112)APPLICATION Au Pt Industries LLC I PO Box 1424-Edwards,Colorado 81632 1970 306 1 784 <br />