2010-05-25_REVISION - C1981008 (8)

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suitable Bench 1 above the overburden spoil, followed by either the mixed topsoil (in the case of the non -prime farmlands) and Lift B followed by Lift A in the case of the prime farmlands. 8.7 Stripping after February 2008 - Non pprime Farmland Soils The non prime farmland topsoil stripping procedures for this area is as follows: Since Lift A thicknesses are from 6 -13 inches and Lift B thicknesses are also relatively shallow (8" to 22"), it is proposed that Lift A and B be combined into one lift of mixed topsoil. It is very difficult to strip thicknesses of approximately 6 -8 inches with such large equipment. The thickness averages for the non prime farmland fields west of the pit in February 2008 show 7.1 inches for the average of Lift A and 17.4 inches of Lift B. Using 80% of the soil sample average to obtain a stripping average for the area, this results in 5.7 inches for Lift A and 13.9 inches for Lift B. Therefore, the total average stripping thickness for the combined Lift A and Lift B is 19.6 inches. The expected range is from 8 inches to 38 inches. The mine foremen and operators will be trained on the stripping of the mixed Lift A & B, and will know to stop the removal when coarse fragments have a rise from less than 10% volume in Lift B to material that has significantly higher coarse fragments (20 -25 %). This is the Bench 1 material. In some cases, bedrock will be encountered at the end of Lift B in the non prime farmland areas. Table 2.05.4(2)(d) -5 shows these thicknesses, acreages and volumes obtained. For the 4.68 acres of prime farmland 98A soil in the northwest comer of the WFC property, most of this topsoil was already stripped (prior to the determination of prime farmlands in February 2008) to create a sediment pond for the mine at this location. It is located at the low point of the permit in this area. The topsoil was stripped in a mixed A and B lift from this area to a depth of 40 inches. This material has been placed in Stockpiles 3 and 4. This material will only be used to reclaim this small area of prime farmland. 8.8 Topsoil Salvage Techniques - All Study Areas prior to February 2008 Before any area at the proposed New Horizon Mine 2 site other than a topsoil stockpile site is significantly disturbed, the suitable topsoil material will be removed to the depth specified in Table 2.05.4(2)(d) -3, Table 2.05.4(2)(d)-4, and Map 2.04.9 -1. Suitable topsoil was salvaged (Revised O tuber 2009) 2.05.4(2)(d) -29