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PERMFILE108167
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PERMFILE108167
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Entry Properties
Last modified
8/24/2016 10:00:37 PM
Creation date
11/24/2007 4:21:56 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008A
IBM Index Class Name
Permit File
Doc Date
12/16/2003
Section_Exhibit Name
NH2 Section 2.05.4(2)(c) Backfilling and Grading
Media Type
D
Archive
Yes
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• Terraces. Terracing in the final reclamation is not proposed at the New Horizon Mine. <br /> <br />Small Depressions. Small depressions are not proposed at the New Horizon Mine. <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 />103.96.0' maximum stripping depth <br />79.93' average overburden <br />7.94' Combined Upper and Lower Dakota <br />I . (REVISED 15 Nov 02) 2.05.4(2)(c) - 2 <br />
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