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~~ <br />Crushing and Screening Level - Zone 1-A <br />Warehouse Level - Zone 1-B <br />Fan Level - Zone 1-D <br />Divezsion Ditch Cut - Zone 3-B <br />2.0 SUMMARY OF CONCLUSIONS AND RECOMMENDATIONS <br />The results of a one-year period of slope deformation and <br />piezometric level monitoring indicate that the following <br />conclusions can be made: <br />o Slope deformations of three important fills on the site <br />(crushing and screening level fill, warehouse level <br />fill, fan level fill) confirm that the stability of <br />these fills, or at least parts of these fills, is <br />marginal and that the factors of safety are close to <br />1. 0. <br />4y Y <br />i. <br />• <br />o We feel that safe mine operations can be performed on <br />these fills during the life-time of the mine without <br />any immediate remedial measures. We recommend that any <br />future construction or storage activity or change in <br />drainage is designed so that it does not further de- <br />crease the stability of these fills. We also feel that <br />the behavior of the fills should be closely inspected <br />in the future; monitoring.of slope deformations with <br />the help of existing inclinometers and piezometers (at <br />intervals of six months or so) would provide an <br />additional means of control. <br />o We feel that the stability of the high parts of the <br />crushing and screening level fill (Zone 1-A of the <br />Reclamation Plan), warehouse level fill (Zone 1-B) and <br />fan level fill (Zone 1-D) is not satisfactory. For <br />reclamation, appropriate changes should be made after <br />the mine abandonment to increase the factors of safety <br />of the fills. Reclaimed configurations as presented in <br />the Reclamation Plan will increase .the factors of <br />safety to acceptable values. <br />o Slope deformation and piezometric monitoring of the <br />large diversion cut (Zone 3-B) indicates no present <br />stability problems. Sloughing of the cut face <br />immediately west of the inclinometer location indicates <br />that the stability of this cut portion may not be <br />satisfactory. Systematic inspections of this area and a <br />review of the reclamation of this cut portion after one <br />year is recommended. <br /> <br />ua~roxocorummw.n+c. <br />