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12 <br />10 <br />8 <br />N <br />N <br />N <br />� 6 <br />`m <br />N <br />4 <br />2 <br />0 <br />0 <br />2 4 6 8 10 12 <br />Normal Stress (ksf <br />LEGEND <br />Strength Envelope from Direct Shear Test <br />Effective Stress Strength Envelope from Consolidated Undrainded Triaxial Test <br />Lower Bound Residual Strength Envelope used in Analysis <br />14 16 18 20 <br />NOTE <br />Summary of Strength Envelopes <br />Curve <br />Description <br />Soil Type <br />Cohesion <br />No. <br />(psf) <br />O <br />South Taylor <br />Clayey Sand (SC) <br />CU <br />ffective Stress <br />Envelope Used i <br />Analysis: <br />31 °, c = 0 psf <br />South Taylor <br />Direct Shear <br />Clayey Sand (SC) <br />36 <br />1D00 <br />Clay (CL) <br />O <br />South Taylor <br />Liquid Limit = 48 <br />33 <br />40 <br />Direct Shear <br />Plasticity Index = 25 <br />South Taylor <br />Clay (CL) <br />® <br />Direct Shear <br />Liquid Limit = 36 <br />23 <br />370 <br />Plasticity Index = 19 <br />Clay (C <br />% <br />0 <br />Liquid Li mit = 33 <br />31 <br />0 <br />Effective Stress <br />Plasticity Index = 19 <br />© <br />Lower Bound <br />Clay (CL) <br />23 <br />370 <br />Lower I <br />ound Used in A <br />ialysis: 0 = 23° <br />c = 370 psf <br />/ <br />2 4 6 8 10 12 <br />Normal Stress (ksf <br />LEGEND <br />Strength Envelope from Direct Shear Test <br />Effective Stress Strength Envelope from Consolidated Undrainded Triaxial Test <br />Lower Bound Residual Strength Envelope used in Analysis <br />14 16 18 20 <br />NOTE <br />Summary of Strength Envelopes <br />Curve <br />Description <br />Soil Type <br />Cohesion <br />No. <br />(psf) <br />O <br />South Taylor <br />Clayey Sand (SC) <br />44 <br />500 <br />Direct Shear <br />South Taylor <br />Direct Shear <br />Clayey Sand (SC) <br />36 <br />1D00 <br />Clay (CL) <br />O <br />South Taylor <br />Liquid Limit = 48 <br />33 <br />40 <br />Direct Shear <br />Plasticity Index = 25 <br />South Taylor <br />Clay (CL) <br />® <br />Direct Shear <br />Liquid Limit = 36 <br />23 <br />370 <br />Plasticity Index = 19 <br />Clay (C <br />O <br />Consolidated - Undrained <br />Liquid Li mit = 33 <br />31 <br />0 <br />Effective Stress <br />Plasticity Index = 19 <br />© <br />Lower Bound <br />Clay (CL) <br />23 <br />370 <br />DATA SOURCES <br />Envelope Nos. 1 and 2 CTL/rhompson, Inc., 2D03a <br />Envelope Nos. 3 and 4 Shannon & Wilson, Inc., 2006c <br />Envelope Nos. 5 and 6 Current Study (See Fig. 5 for Envelope 5) <br />Adapted from: Shannon & Wilson, <br />Geotechnical Study, Collom Temporary Spoil <br />Fill, KCCC - Colowyo Mine, Job No. <br />23-1-01101-400, July 2009. <br />