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PERMFILE53387
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PERMFILE53387
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Last modified
8/24/2016 10:56:50 PM
Creation date
11/20/2007 3:45:43 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Section_Exhibit Name
Exhibit 69 Section A I. Initial Project Description
Media Type
D
Archive
Yes
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Mountain Coal Company Exhibit 69 <br />West Elk Mine Sylvester Gulch Facilities <br />. light-use roads prior to topsoiling. An additional 20,000 CY of fill material from the shag <br />sites will be relocated to the substation azea during regrading and slope flattening of this <br />site. The remaining 40,000 CY of relocated material will be taken from the two stream <br />crossing embankments (Sylvester Gulch crossing and the "Substation Gulch" crossing) and <br />used to reclaim the main access road back to a light-use road. The remaining <br />approximately 80,000 CY of net fill material, which includes the material used to construct <br />engineered embankments along the lower portion of the main hauUaccess road and the <br />remaining fill material at the shaft sites, will generally remain in place and be regraded to <br />AOC. Leaving the geogrid type engineered embankments in place will create significantly <br />less disturbance during reclamation and will also provide additional long-term stability to <br />reclaimed slopes. The engineered embankments for the main hauUaccess road crossing of <br />Sylvester Gulch and the block faced retaining wall at the shafts site will be removed upon <br />final reclamation. <br />The ventilation Shaft #3 site will also be reclaimed to AOC; however, not all of the <br />material excavated from Shaft #3 is required to be returned to achieve the AOC of the <br />area. Approximately 140,000 CY of material from the Shaft #1 and #2 site will be hauled <br />to backfill and regrade the shaft pad and road. The remainder of the material <br />(approximately 11,000 cy) will remain at the Shaft #1 and #2 site. Both sites (Shaft #1 <br />and #2, and Shaft-#3) will be backfilled and regraded to approximate original contour as <br />shown on Map 58B. The reclamation of these two areas will be such that the areas will be <br />stable, the hydrologic balance will not be impacted, topsoil will be salvaged, stored and <br />replaced, and the disturbed aeeas will be revegetated. Topsoil stockpiled at the Shaft #3, <br />and from either the Shaft #1 and #2 stockpile or stockpile #1 will be used. <br />Only a portion of the fill material used to construct the Sylvester Gulch main hauUaccess <br />road and substation access road is planned to be removed because the reclamation plan for <br />these two roads includes reducing the roads to light-use roads. The geogrid type <br />engineered embankments along the road will be left in place. For light-use roads that will <br />be entirely reclaimed, the reclamation process will be to pull embankment (fill) material up <br />to the road, supplemented with material from other areas, and place and grade this <br />material to provide a smooth transition from uphill to downhill slopes. Road base material <br />will be covered and buried in place. For hauUaccess roads that will be reconverted to a <br />light-use road (Sylvester Gulch and the substation roads), fill from other areas will be <br />placed in the toe of the cut, graded, and compacted to reestablish the light-use road width. <br />Where engineered embankments exist, the light-use road width will be established on the <br />fill side of the road such that removal of the geogrid type stabilization fabrics is not <br />required. Stone slope facing will be covered with soil and revegetated. <br />The Sylvester Gulch road has been approved as a permanent facility. The road is currently <br />an access road which is maintained to provide access to the Sylvester Gulch fan. Other <br />than some minor cut and fill in the area of the fan, the road was approved as a permanent <br />facility (see Exhibit 42). With the proposed facilities to be located in Sylvester Gulch, the <br />i road will be upgraded to a hauUaccess road and the alignment will change. Upon final <br />14 Nov. 1996 PR07R: RemsedMay 1997MR216; <br />Revised Jul. 1997MR219 <br />
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