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2020-06-25_REVISION - C1981019 (6)
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2020-06-25_REVISION - C1981019 (6)
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Last modified
1/8/2025 2:43:03 AM
Creation date
6/25/2020 10:51:12 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
Revision
Doc Date
6/25/2020
Doc Name
Proposed Revision Materials
From
Colowyo Coal Company, LP
To
DRMS
Type & Sequence
MR220
Email Name
ZTT
JDM
Media Type
D
Archive
No
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RULE 2 PERMITS <br /> Topsoil will be removed by bulldozers, loaders or scrapers as described in Section 2.05.3, Production <br /> Methods and Equipment. <br /> Topsoil stockpile locations and extent of stripping is presented in Topsoil Handling Map (Map 28C). <br /> Topsoil stripping will occur in advance of mining and can be anticipated to occur within the mine plan <br /> blocks depicted on Map 23B. The overall life-of-mine topsoil balance is estimated in Table 2.04.9-16. It <br /> should be stressed that these yearly figures are estimates and can only be useful as a general guide to <br /> topsoil removal or replacement during any given year. <br /> The stockpiling of topsoil will continue until all pit development has progressed to its maximum extent. <br /> Areas available for final reclamation prior to mine closure consist primarily of backfilled pit areas. <br /> Topsoil to cover these areas will either be direct placed from areas of topsoil removal activities or topsoil <br /> will be hauled from the topsoil stockpiles. Direct placement of topsoil will be the preferred method, <br /> however, the stockpiled material will be utilized if equipment schedules, weather conditions or other <br /> operational factors make direct placement less desirable or less cost effective. After mining and regrading <br /> operations have ceased, all stockpiled topsoil will be used to reclaim the remaining pit and other <br /> disturbance areas. <br /> Topsoil will be stored in topsoil stockpiles as shown on Map 28C. Stockpiles will be constructed with <br /> outside slopes no steeper than 3H:1V. Stockpiles are specifically located to avoid erosion from wind and <br /> water and additional compaction or contamination. As can be determined from the Topsoil Handling Map <br /> (Map 28C), all stockpiles are located within stable areas. The piles will be protected from wind erosion by <br /> planting a perennial mixture as explained in Section 4.06.3 as soon as conditions allow. Proper seasons of <br /> planting will be early spring or late fall. In addition to the planted material, a considerable amount of <br /> volunteer growth can be expected to grow on all stockpiled topsoil. <br /> External erosion will be controlled through proper location of the stockpiles. No topsoil stockpiles will be <br /> placed in a drainage bottom where external erosion might pose a potential threat. <br /> Unnecessary compaction will be avoided by keeping all but essential traffic off the stockpiled areas. In <br /> accordance with Rule 4.02.7, topsoil signs will identify topsoil stockpiles. Contamination of the <br /> stockpiles will be eliminated by the careful selection of sites that are distant from the areas where actual <br /> mining activities are occurring. Drainage ways and areas near spoiling and blasting will be avoided where <br /> possible. <br /> 2.05.3 (6) Overburden <br /> Additional description of the removal, handling and storage of overburden material within the permit area <br /> is described in Section 2.05.3(l). The spoil handling monitoring plan parameters for the operation can be <br /> found below. <br /> Overburden Monitoring Program <br /> As discussed in Volume 1, as long as the total percentage does not exceed 15% of the total truck/shovel <br /> sequence for each drill hole, suitability should not be an issue based upon the upper overburden seam <br /> quality and the expected dilution of lower overburden materials (more likely to exhibit elevated parameter <br /> levels) through mixing as part of the logical mining sequencing of overburden and coal removal in the <br /> Collom area. <br /> In the following analysis, Colowyo demonstrates the likelihood spoil material placed near the surface of <br /> final regraded overburden areas will be unsuitable is low. This demonstration was completed by showing <br /> Collom—Rule 2,Page 77 Revision Date: 6/22/20 <br /> Revision No.: MR-220 <br />
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