Laserfiche WebLink
thicknesses are being followed. The operators will be trained on the stripping of Lift B, and will <br />know to stop the removal when coarse fragments rise from less than 10% volume in Lift B to <br />material that has significantly higher coarse fragments (20-25% which is Bench 1). This was the <br />cause of the cutoff of the Lift B material in the 1998 soil survey. The Lift B average thickness is <br />greater than the average 32" for Lift B in Table 2.04.9-3 for the 98E soil at 90% recovery, however, <br />this additional average of 4 inches (32" vs. 36") is due to the fact that some lower quality soils have <br />also been included in the prime farmland field. See Map 2.04.9-1. In addition, the area of the field <br />has changed slightly, giving more area to the southwest corner, which has higher thicknesses. <br />The NRCS has stated that it is desired to maintain a total thickness of approximately 4.0 feet in the <br />replaced soil for the prime farmland field. The policies outlined above will provide approximately <br />16 inches of Lift A and 36 inches of Lift B, which is a total of 52 inches, which is more than the 48 <br />inches desired by the NRCS. Also, some extra material stripped in the undisturbed area will be <br />used in the previously stripped area on the Morgan property. All of this Lift A and Lift B soil will be <br />stockpiled separately or immediately placed on the Morgan backfilled area. The stripped prime <br />farmland soil will o__l)[ be used for reclaiming prime farmland on the Morgan property. <br />In addition to the commitments outlined above, the Morgan property will receive a minimum of 3.0 <br />feet of substitute subsoil or Bench 1 material below the Lift B placement. This is the material that <br />is below Lift B in the stripping sequence but has invariably tested to meet all subsoil suitability <br />parameters. See the report in Attachment 2.05.4(2)(d)-1. The operators will be trained to stop any <br />stripping of the Bench 1 material if the coarse rock fragments exceed approximately 25% on a <br />consistent basis. This is the Bench 2 overburden and usually exceeds 50% coarse fragments. For <br />this reason, it is easily distinguishable to the equipment operators. <br />Non Prime Farmlands Soils <br />This area basically covers the Benson West property, the Lloyd property and the WFC property <br />north of BB Road and west of 2700 Road. The non prime farmland topsoil stripping procedures for <br />this area is as follows: Since Lift A thicknesses are from 6-13 inches and Lift B thicknesses are <br />also relatively shallow (8" to 22"), Lift A and B will be combined into one lift of mixed topsoil <br />because it is very difficult to strip thicknesses of approximately 6-8 inches with such large mining <br />(Revised June 2008) 2.04.9-26