Laserfiche WebLink
profile development, and /or are excessively stratified. The salvageable topsoil from these units <br />was primarily utilized, whenever feasible, in postmine dry pastureland area. One -lift topsoil was <br />isolated from the two -lift topsoil during all soil handling operations. <br />For the portions of the 1999 expansion area that were disturbed prior to February 2008, the A, Bt, <br />Bw, Bk and C horizons were combined for salvage in a mixed lift and suitable subsoil (Bench 1 <br />material) was salvaged and placed in Lift B. Map 2.05.4 -4 shows the thicknesses of both materials <br />that were placed in these areas as part of the reclamation. <br />Appropriate adjustments will be made to the recovery rate as dictated by actual field conditions <br />and initial topsoil balance reports. The actual amount of topsoil salvaged has been less than the <br />amount estimated in the soil survey. As of July 1994, WFC has experienced an overall recovery <br />of 80 percent compared to the volumes shown in the soil surveys. Table 2.04.9 -6 reflects estimated <br />salvage quantities for the 1995 study area and Tables 2.04.9 -7A & B reflect estimated salvage <br />quantities for the 1998 study area. <br />16.1 Topsoil Salvage Thickness - 1988 Study Area <br />This study addresses the approximate original permitted area of 274 acres or 235 disturbed acres, <br />as shown on Map 2.04.9 -1. The salvageable thickness of topsoil material presented in this section <br />are based on laboratory data and extensive field observations, and represent onlythe most suitable <br />sources of topsoil material. No unsuitable sources of topsoil will be salvaged and used during <br />reclamation activities. Table 2.04.9 -5 summarizes topsoil salvage thickness and characteristics <br />by map unit for the New Horizon 2 Mine disturbance area. It should be noted that the topsoil <br />thickness and volumes listed in Table 2.04.9 -5 are only estimates derived from field sample pits. <br />WFC live handled the majority of the topsoil with trucks and the mine shovel or large front end <br />loaders in front of the active pit to the final graded backfill. WFC is committed to salvaging and <br />redistributing all available topsoil. As of June 2010, the only areas from the original permit that still <br />requires topsoil replacement are the haul road, the overburden stockpile and some other minor <br />areas. These areas cannot be re- topsoiled until the mine is in final reclamation. <br />Revised September 2010 (PR 06) 2.04.9 -29 <br />