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~-- <br />~., water within the current pond areas be lowered as much as <br />possible in order to reduce the potential for sources of water <br />which would impact construction of the toe area. The method of <br />dewatering is expected to be a staged type dewatering with back- <br />up conditions for dewatering should primary methods fail. These <br />back-up conditions are provided due to the uncertainty in extent <br />• and location of the groundwater conditions, the uncertainty of <br />the layered fill areas and the variabilities of the permeability <br />characteristics of the materials. Because of these conditions, <br />it is virtually impossible to effectively design a dewatering <br />program to anticipate the variability of conditions. Therefore, <br />_ a dewatering methodology, which has been successfully utilized in <br />the past for severe conditions where variability of materials <br />make the site unsuitable for detailed dewatering designs, will be <br />utilized during construction. <br />5.4 $,jT$ PREPARATIONS <br />Measures to be conducted for preparation of the site form an <br />important aspect to the construction operations. This requires <br />characterization of the site conditions in terms of strategic <br />location of haul road for placement and removal of borrow <br />• materials, temporary stockpile areas, and removal and replacement <br />of toe stabilization areas. Site preparations will require <br />removal of existing topsoil stock piles, excavation of excess <br />materials within slope areas and monitoring of unstable areas to <br />ensure the safety of the existing mine bench and to prevent <br />further instability. In addition, specific areas for stockpiling <br /> <br />23 <br />