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• Irreversible structural damage would occur to these soils if they were salvaged while saturated. <br />Therefore, topsoil salvage equipment will generally be limited to the drier areas. Wet areas will be <br />dewatered and allowed to dry prior to salvage. Appropriate adjustments will be made to the <br />recovery rate as dictated by actual field conditions and initial topsoil balance reports. The actual <br />amount of topsoil salvaged has been less than the amount estimated in the soil survey. Tables <br />2.05.4(2)(d)-1 (1988 disturbance) has been revised to reflect the actual salvage and perceived <br />future topsoil salvage quantities. As of July 1994, WFC has experienced an overall recovery of 80 <br />percent. Table 2.05.4(2)(d)-2 reflects estimated salvage quantities for the 1996 disturbance area <br />and Table 2.05.4(2)(d)-3 reflects estimated salvage quantities for the 1999 disturbance area. <br />Toasoil Salvage Techniques -Year 2001 and onward. <br />At the mine's option, The topsoil will be salvaged using the techniques described in the section <br />above, or by the following method: the Lift A topsoil will be stripped in one lift by mine dozers into <br />short-term (<90 days) stockpiles adjacent to the upper pit highwalls. As the shovel nears the <br />topsoil pile during the course of its normal excavation, a dozer will push the topsoil to the shovel <br />for loading into haul trucks. The haul trucks will transport the material to the spoil side for direct <br />. laydown or stockpiling. If direct laydown is used, the topsoil is spaced by haultruck dumping for <br />push spreading by a mine dozer. The laydown thickness is determined by the amount of material <br />immediately in front of the pit versus the available spoil area behind the pit, with minimum goal of <br />approximately one foot of laydown thickness. The dozer operater will be guided by either fill <br />stakes in front of the push or by test boring after the push. Because of this process, topsoil <br />redistribution will no longer consist of phased campaigns as in the past, but will be an integral, <br />ongoing portion of the mining operation. The Lift B material will consist of suitable material <br />selected from the upper bench and is essentially the same as the uppermost four foot of regraded <br />spoil as described in an earlier section. <br />Toasoil Storage. When the direct haul of topsoil is not feasible, the topsoil will be stored in <br />approved stockpiles (see Map 2.05.3-1, Operations Plan New Horizon 2). Stockpiling of topsoil <br />will be required for topsoil removal in the initial box cut, haul road, spoil stockpile areas, sediment <br />pond, shop area, and final pit/highwall reduction areas, Topsoil stockpiles will be located in areas <br />that will not be disturbed or contaminated by the ongoing mining operation and where the stored <br />topsoil will not be lost to wind erosion or surface runoff. When a topsoil stockpile is placed, it will <br />• cae..saaa is Nom az~ 2.05.4(2)(d) - 11 <br />