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The results of the dike analysis using the reduced material values was: <br />Tri County Worst Case <br />GRID SEARCH ANALYSIS <br />Approximately 50 slices selected <br />Xmin= -30.0 Xmax= 90.0 Increment= 5.0 <br />Ymin= 100.0 Ymax= 170.0 Increment= 5.0 <br />Rmin= 0.0 Rmax= 60.0 Increment= 4.0 <br />Minimum FS found during grid pattern = 1.75 <br />Found at X= 5.0, Y= 100.0, R= 12.0 <br />The failure circle generated by using the weakened material data is the same as the circle <br />generated by the real world conditions. The worse case condition has a factor of safety of 1.75, <br />indicating a safe slope even with the lower density and reduced internal angle of friction. For this <br />reason, the existing embankment is stable. <br />I certify, as a professional engineer registered in the State of Colorado with 23 years of <br />experience, that this slope is stable with the materials and slope angles selected. <br />° <br />° <br />Greg Lewicki, P.E. <br />Date <br />Tri County Dike Slope Stability Jan 08 7