2010-05-25_REVISION - C1981008 (4)

Home Browse Search

the area to be stripped. The foreman will check with the equipment operators to make sure the proper thicknesses are being followed. The operators will be trained on the stripping of Lift B, and will know to stop the removal when coarse fragments rise from less than 10% volume in Lift B to material that has significantly higher coarse fragments (20 -25% which is Bench 1). This was the cause of the cutoff of the Lift B material in the 1998 soil survey. The Lift B average thickness is greater than the average 32" for Lift B in Table 2.04.9 -3 for the 98E soil at 90% recovery, however, this additional average of 4 inches (32" vs. 36 ") is due to the fact that some lower quality soils have also been included in the prime farmland field. See Map 2.04.9 -1. In addition, the area of the field has changed slightly, giving more area to the southwest corner, which has higher thicknesses. The NRCS has stated that it is desired to maintain a total thickness of approximately 4.0 feet in the replaced soil for the prime farmland soil field. The policies outlined above will provide approximately 16 inches of Lift A and 36 inches of Lift B, which is a total of 52 inches, which is more than the 48 inches desired by the NRCS. Also, some extra material stripped in the undisturbed area will be used in the previously stripped area on the Morgan property. All of this Lift A and Lift B soil will be stockpiled separately or immediately placed on the Morgan backfilled area. The stripped prime farmland soil will only be used for reclaiming prime farmland soil on the Morgan property. In addition to the commitments outlined above, the Morgan property will receive a minimum of 3.0 feet of substitute subsoil or Bench 1 material below the Lift B placement. This is the material that is below Lift B in the stripping sequence but has invariably tested to meet all subsoil suitability parameters. See the report in Attachment 2.05.4(2)(d) -1. The operators will be trained to stop any stripping of the Bench 1 material if the coarse rock fragments exceed approximately 25% on a consistent basis. This is the Bench 2 overburden and usually exceeds 50% coarse fragments. For this reason, it is easily distinguishable to the equipment operators. 16.2 Non Prime Farmlands Soils This area basically covers the Benson West property, the Lloyd property and the WFC property north of BB Road and west of 2700 Road. The non prime farmland topsoil stripping procedures for (Revised October 09) 2.04.9 -34