PERMFILE59194 - Laserfiche WebLink

Home Browse Search

Section 780.18(b) Continued. • removed. Therefore, during reclamation, the topsoil and subsoil salvaged from a given pit will be reapplied to that pit. As shown in Table 58, Soil Removal Volumes and Acreages by Mine Plan Years, and in Table 59, Soil Redistribution Plan, a minimum depth of 0.5 feet of soil (topsoil and subsoil) will be available for redistribution over Pit i. A minimum of 0.50 feet of soil will be available for redistribution over Pit i by salvaging six inches from the entire area. The CMLRD has expressed some concern relative to potential sodicity in the Pit 1 area. In order to ensure a minimum thickness of four feet of suitable material, Kerr will implement a spoil sampling program for the Pit 1 regraded surface. The sampling program along with mitigation measures for any suspect area are described under the subtitle "Overburden Sampling Program" later in this section. Although retopsoiling will immediately follow backfilling and grading, • because of the size and depth of the pits all topsoil and subsoil will have to be stockpiled until at least 1991 and possibly up to 10 years thereafter. (See: Figure 33, Typical Steady State Pit and Table 57, Soil Redistribution Plan.) Amore detailed description of the Soil Removal and Replacement Plan is found in Sections 779.21 and 816.21- 816.25. As depicted on Maps 7-13, Geologic Cross•Sections and Figures 32 and 33, Typical Pit Cross-Section, and Typical Steady State Pit, respectively, the steep dips of the coal and overburden, combined with the corresponding economic pit configuration, dictate that the coal must be mined through open pit methods. Open pit mining by its nature requires that a large amount of overburden be removed and stored outside the active mining area to create an opening of • MR t3 H:\857\V OL.2\SECTION.780 Of/26/959:70am WPi 1lcmc 780.60 Revised - 01/30/95