2014-02-06_PERMIT FILE - C1981008A ‎(6)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 2/6/2014
• Doc Name: SOIL RESOURCE INFORMATION
• Section_Exhibit Name: Section 2.04.9 Soil Resource Information
• Media Type: D
• Archive: Yes

16.4 Prime Farmland Soils Stripping After February 2008
Prime farmland soils handling is covered in Section 2.06.6.
16.5 Non Prime Farmlands Soil Stripping Procedures after February 2008
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 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 "), Lift
A and B will be combined into one lift of mixed topsoil because it is very difficult to strip thicknesses
of approximately 6 -8 inches with such large mining equipment. The Survcadd 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. See Table 2.04.9 -8C. 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 Mixed Topsoil ( 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. In some cases, bedrock will be
encountered at the end of Lift B in the non prime farmland areas.
An additional amount of subsoil, which is basically the Bench 1 overburden material, will be stripped
and placed as shown on Map 2.05.4 -7. The Benson West property has already been backfilled with
a minimum of 30 inches of this material. The Lloyd property will receive a minimum of 30" of this
material and the WFC property will receive a minimum thickness of 24" of this Bench 1 material.
For the purposes of the volume calculations, the suitable subsoil material on the Benson West is
assumed to be 30" in thickness, and Lloyd property is 30" and the WFC property will be 24" in
thickness. These amounts allow a minimum of 48" total suitable medium on the Benson and Lloyd
properties and 44" on the WFC property.
Topsoil is stripped using a combination of mining equipment. Mixed Topsoil is windrowed by dozers
into a pile, from which a shovel loads the dump truck. The dump truck then either dumps the
August 2013 (PR 08) 2.04.9 -30