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PERMFILE137012
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PERMFILE137012
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Entry Properties
Last modified
8/24/2016 10:37:38 PM
Creation date
11/26/2007 5:25:04 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)(c) Backfilling and Grading
Media Type
D
Archive
Yes
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• General Grading Requirements <br />Final Graded Slopes. Postmining slopes will not be uniform but will approximate the general <br />nature of the premining topography. All highwalls will be eliminated and graded to a 5:1 slope or <br />flatter. Minor areas on the north limit of the amendment area have slopes greater than 3H:1V. <br />These slopes will be restored to approximate original contour. <br />Terraces. Terracing in the final reclamation is not proposed at the New Horizon Mine. <br />Small Depressions. Small depressions are not proposed at the New Horizon Mine with the <br />exception of the restoration of the depression at Pond 014. The premine landscape shows this <br />depression. After mining, this depression is restored and becomes Pond 014. This pond handles <br />a small drainage area which flows into the depression. <br />Steep Slopes. New Horizon Mine does not have steep slopes as defined in the regulations. <br />• Final Grading. Final grading and preparation of the backfilled material before placement of <br />topsoil material will be done along the contour to minimize subsequent erosion and instability. If <br />such grading is hazardous to equipment operators, then grading will be done in a direction other <br />than generally parallel to the contour. <br />Final Pit Backfilling. In order to eliminate any final highwalls and to achieve the approximate <br />original landform, some highwall material will be pushed or dozed into the mined area. Map 2.05.4- <br />1 shows typical cross sections of the fill material placed into the mined pits. Material above the final <br />highwall may be blasted or ripped and then graded to blend into the surrounding topography. <br />Thin and Thick Overburden. <br />The New Horizon 2 permit area does not meet the requirements of either the thick or thin <br />overburden as shown by the following calculations: <br />u <br />(Revisetl Jufy 2006) 2.05.4(2)(c)-5 <br />
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