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PERMFILE117644
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PERMFILE117644
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Last modified
8/24/2016 10:13:23 PM
Creation date
11/25/2007 4:05:56 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008A
IBM Index Class Name
Permit File
Doc Date
7/30/2007
Section_Exhibit Name
Section 2.05.4(2)(d) Topsoil (Redistribution)
Media Type
D
Archive
Yes
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• topsoil deficient in Lift 1 of the two lift irrigated pasture reclamation portion. This Lift 1 has typically <br />come from the first lift of the 30C soil group. To correct this shortage, WFC will substitute excess <br />soil type 808 from the major drainage directly north of Pond 007 for Lift 1. During Phase 6 topsoil <br />campaign, 2.4 feet of 808 soil was removed from the drainage area and used for mixed topsoil <br />replacement. The soil map shows the 808 depth being 2.4 feet in the drainage area. There is <br />more 808 to be salvaged. The 808 soil looks good and should make great Lift 1. WFC will test <br />the remaining 808 to verify its quality. <br />The topsoil balance study also shows the 15 acres of soil type D706 was originally over reported. <br />WFC knew this because when the topsoil was being salvaged in 1993, we were not recovering <br />the topsoil volumes the topsoil map was depicting. This shortage was reported to the Colorado <br />Division of Minerals and Geology inspector at that time. In the fall of 1995, all salvaged D70B Lift <br />1 was redistributed onto the designated area. 6.73 acres were covered at 0.8 feet before the <br />stockpile was depleted. The postmine topsoil replacement map, Map 2.05.4-4 has been modified <br />to reflect actual conditions. <br />• Topsoil Salvage Depths - 1999. In 1998 WFC conducted a detailed soil survey and topsoil <br />salvage depth survey (Map 2.04.9-1) for the proposed mine permit expansion area. This included <br />land to the north and west of present operations. The conclusions of this study are in Table <br />2.05.4(2)(d)-3. <br />Topsoil Salvage Techniques - 1988 and 1999. Before any area at the proposed New Horizon <br />Mine 2 site other than a topsoil stockpile site is significantly disturbed, the suitable topsoil material <br />will be removed to the depth specified in Table 2.05.4(2)(d)-1, Table 2.05.4(2)(d)-2, Table <br />2.05.4(2)(d)-3, and Map 2.04.9-1. Suitable topsoil will be salvaged from all significant disturbance <br />areas including sediment ponds (includes pond area, embankment, and spillway), mining <br />activities, spoil stockpiles, haul roads, access roads, mining area (includes box cut spoil and <br />highwall reduction area) shop area, and diversion ditches. Topsoil will be removed from all cut <br />and fill slopes. No topsoil will be salvaged from the light use roads utilized for environmental <br />monitoring or power line corridors, except where cut and fills are required. Prior to topsoil <br />removal, vegetation which is too large for incorporation into the topsoil will be scraped away and <br />combined with the overburden. The remaining vegetation will be incorporated into the topsoil to <br />• (Revised 24 AUG 06) 2.05.4(2)(d)-11 <br />
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