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Pitch Reclamation Project -Sediment Control Embankment November, 2002 <br /> <br /> <br />Table 1 -Original Input Parameters (continued) <br />Zone 3 -Downstream shell, compacted weathered sandstone (GM/GP) <br />Zone 4 -Alluvial foundation soil, sand-silt-gravel mixture (GM/GP) <br />Table 2 -Revised Input Parameters <br />Material Ycmo~o -pcf Ycsa,t -pcf ~' -degrees c' - psf <br />Zone 1 115 135 37 0 <br />Zone 2 110 130 33 0 <br />Zone 3 110 135 29(32) 100 <br />Zone 4 105 120 25(32) 100 <br />Zone 5 110 130 32 (37) 0 <br />Zone 6 135 140 40 1000 <br />Zone 7 105 130 27 (30) 100 (0) <br />Zone 1 -Upstream and downstream shell material unaffected by seepage through core <br />Zone 2 -Downstream shell material affected by perched water <br />Zone 3 -Core material unaffected by seepage through the core <br />Zone 4 -Core material affected by perched water and maximum reading of P-3 water level <br />Zone 5 -Alluvial foundation material under downstream shell <br />Zone 6 -Foundation bedrock material <br />Zone 7 -Core material above and below the zone of perched water <br />(32) -Increased for Sensitivity Check -See Section 4.4 for discussion <br />4.4 Case Studies and Results <br />Several cases for different site conditions were. considered in evaluating the stability of the <br /> <br />embankment with respect to the perch water levels recorded in the piezometers. The most critical <br />cases, based on estimated factors of safety against slope failure, are listed below along with the <br />The Homes~ake Mining Company <br />The Glasgow Engineering Group, lnc. <br />