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CESARE,INC. <br /> A summary of the material properties used in our analysis is shown in Table 3. <br /> TABLE 3. Material Properties Used <br /> H draWlIc Condwctiv' Oriicdon <br /> unit Cooeacn Angle <br /> 'lll WOht c 0 <br /> Material cane sac itt sec da K � d <br /> Clay 1.00E-07 3.28E-09 2.83E-04 0.1 125 100 26 <br /> Sand 1.00E-06 3.28E-08 2.83E-03 1 0.1 125 0 30 <br /> Gravel 1.00E-02 3.28E-04 28.35 0.1 135 0 35 <br /> Weathered 9,53E-05 3.13E-06 2.70E-01 0.1 130 50 27 <br /> Shale <br /> Shale 1.00E-08 3.28E-10 2.83E-05 0.01 130 500 25 <br /> Slurry Wall 1st 1.00E-06 3.28E-08 2.83E-03 1 115 0 30 <br /> Slurry Wall 1.00E-07 3.28E-09 2.83E-04 1 115 0 30 <br /> 2nd <br /> ANALYSIS RESULTS <br /> We performed seepage and slope stability analyses using SEEP/W and SLOPE/W software <br /> published by Geo-Slope International and contained in the Geostudio 2007 suite of applications <br /> (Version 7.20, Build 5033). <br /> STEADY STATE SEEPAGE ANALYSIS <br /> For the steady state seepage analysis of the reservoir when empty, we analyzed the cross section <br /> we created at Station 31+52 (the thickest gravel layer encountered). We first evaluated a slurry <br /> wall with a hydraulic conductivity 1x10-6 cm/sec. The Seep/W analysis provided the total flux (i.e., <br /> flow) in a one-foot length of wall of 5.5804 ft3/day. The Seep/W analysis results for the slurry wall <br /> with a hydraulic conductivity of lx10"6 cm/sec are shown in Figure 1. We multiplied the flux by the <br /> total wall length (around the perimeter) to obtain an estimate of the total flow through the wall. <br /> The total wall length was taken as the average of the perimeter of the pit at the tap of the 3:1 <br /> slope and the perimeter of the base of the reservoir (4460 feet). For this case, we estimated total <br /> inflow through the bottom and the perimeter of 24,888 ft3/day. The State Engineer's total <br /> maximum allowable inflow (bottom and perimeter) is 28,767 ft3/day. Based on the material <br /> properties used, for the section analyzed with the thickest gravel layer, the factor of safety is about <br /> 1.2- between the actual calculated inflow and the total maximum allowable inflow. <br /> 11.124 GP Ranches Memo 03.21.1303.21.13 3 <br />