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3.3 RECLAIMED FACILITIES <br />• <br />• <br />3.3.1 Fills <br />The safety factor of existing fills which are con- <br />structed at their angle of repose must be close to unity. <br />This is not considered satisfactory for long-term stability <br />after abandonment of the mine and reclamation of the site <br />area, particularly since the reclaimed site should be essenti- <br />ally maintenance free. <br />A suitable increase in safety factor for the reclaimed <br />fills will have to be achieved by a reconfiguration of the <br />existing fill slopes to reduce their overall angle. Stability <br />analyses are required in order to determine the increase in <br />safety factor achieved by alternate reconfigurations, and also <br />to evaluate possible long-term changes in conditions, such as <br />increased ground water levels. <br />3.3.2 Cuts <br />The overall stability of rock cuts is generally con- <br />sidered to be satisfactory at present. However, some cuts <br />where there is currently a potential for rockfall problems <br />will have to be reclaimed in order to eliminate the long-term <br />effects of the rockfall problem. <br />The diversion channel cut may require some immediate <br />modifications in order to achieve acceptable stability. How- <br />ever, further flattening or STittressing of the slope may be <br />necessary for final reclamation. <br />I Other cuts in soils will be reclaimed selectively. <br />Selection of cuts to be reclaimed will be based on evaluation <br />• ~~ of the consequences of failure rather than on stability <br />~ analyses, since it is considered that this approach will mini- <br />mize the disturbance to the cuts which have already been <br />successfully reve~etated. <br />GEOHYDQO CONSULTING, INC. <br />20 _ <br />