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A one lift operation will be utilized for the following soil map units in the proposed 1999 <br />disturbance area: 98B and 98H (Table 2.05.4(2)(d)-3). These soil map units will have all <br />horizons combined for salvage purposes. A one lift method will be used due to the steep terrain <br />10 to 60 percent slopes) and shallow depth to bedrock. The salvageable topsoil from these units <br />will primarily be utilized, whenever feasible, in postmine dry pastureland areas where postmine <br />contours exceed 10 percent slope. One-lift topsoil will be isolated from the two-lift topsoil during <br />all soil handling operations. <br />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 <br />be 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 <br />80 percent. Table 2.05.4(2)(d)-2 reflects estimated salvage quantities for the 1996 disturbance <br />area and Table 2.05.4(2)(d)-3 reflects estimated salvage quantities for the 1999 disturbance <br />• area. <br />Topsoil 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 of9 <br />material immediately in front of the pit versus the available spoil area behind the pit, with <br />minimum goal of approximately one foot of laydown thickness. The dozer operater will be <br />guided by either fill stakes in front of the push or by test boring after the push. Because of this <br />process, topsoil redistribution will no longer consist of phased campaigns as in the past, but will <br />• (Revised ~3iiz~oz> 2.05.4(2)(d)- 11 <br />