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Material Keys <br />ropsoll <br />Sand and Gravel <br />120 <br />Poorly Graded Sand and Gravel <br />10' offset <br />100 <br />2500 <br />80�e <br />tio4e <br />Critical Area Slope Configuration <br />3:1 and 1.25:1 Mine Slope r/ 10' offset unconsolidated pit floor <br />60 <br />5•�oee <br />Mire _ <br />40 <br />, <br />20 <br />Analysis 1 <br />Single Stability Analysis <br />Method: Bishop Simplified <br />0 <br />Surface: Circular <br />Results <br />0 20 40 60 80 100 120 140 160 180 <br />Factor of Safety: 1.55 <br />Version 6.10 <br />Project Varra Coulson M2013064 <br />3/1 and 1.25/1 Mine Slope w/ 10' offset unconsolidated Edited: 9Ju12014�.ssedsJul z01a <br />File: C:1Userslp...Warra Coulson 3 and 1.25 to 1 Mine Slope w 10' offset unconsolidated.gmf US Dept of Interior - Office of Surface Mining <br />