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Geotechnical Stability Exhibit Exhibit U <br />There are no buildings or any structures outside the permit area which could be affected by the <br />operation. All reclaimed azeas will be restored to relatively flat (<5%) slopes except for the <br />shore, which will be reclaimed to a 3H:1 V slope with below water slopes of 3.OH:1.OV. The <br />gravel zone has a good mix of fines and gravel sizes and has been fairly well compacted over <br />time. <br />The natural gravel material has some cohesion. This results in slope stability pazameters of <br />cohesion and internal angle of friction of high values. When this is combined with a relatively <br />mild slope of 3H:1 V, it is expected that the safety factor for this short slope will be above 1.5. <br />I, Greg Lewicki, P.E., with over 20 years of experience in mine slope safety analysis in <br />Colorado, state that this is true. <br />5/Z62005 Page U-1 <br />