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REV90451
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Entry Properties
Last modified
8/25/2016 3:12:10 AM
Creation date
11/21/2007 11:03:02 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977211
IBM Index Class Name
Revision
Doc Date
5/1/1994
Doc Name
APPLICATION FOR PERMIT AMENDMENT AM-01 - PIKEVIEW QUARRY PNM-77-210
Type & Sequence
AM1
Media Type
D
Archive
No
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Mining Plan <br />In Area H much of the waste produced by the processing will he hauled directly back into • <br />the Hole as backfill with little or no temporary storage. There may be some short periods of <br />time when room available for disposal in the Hole is not available. In those cases, waste will <br />be stored as near future backfill locations as possible so it can easily he used in backfilling. <br />MINIIVG TOPOGRAPHY VS. RECLAMATION TOPOGRAPHY <br />Mining Base Topography: Figure MP-7 (11x17 sheet at back of this exhibit) shows the <br />configuration to be; produced by the mining. That is, this topographic map shows what would <br />remain if no reclamation was done and the topography left by the mining was simply left in <br />place. Figures MP-8 through MP-10 (on the following pages) are cross-sections through this <br />topography. They show the difference between the existing topography and the fmal mining <br />topography. All these figures combined illustrate the kinds of average slopes to be produced <br />through the minim; process. • <br />The mining topography on the cross-sections shows a slight increase in the slope gradient <br />where the edge of the overexcavation Hole is encountered. This break in the slope gradient is <br />best and most acctuately portrayed on Figure MP-8 where the cross-section line is essentially • <br />perpendicular to the contours. <br />Reclamation Topography: Of course, the topography shown in Figure MP-7, which <br />shows the mining Ipography, is not the topography that will be produced through reclamation. <br />The reclamation upography is shown on the Reclamation Plan Map (Exhibit F) and in <br />cross-sections contained in the Reclamation Plan (Exhibit E). <br />Average reclamation slopes above the level of the overexcavation Hole will be quite <br />similar to those produced by mining alone. It is this average slope that is used th the Bench <br />Geometry Model to determine the appropriate step width for any particular portion of the quarry. <br />Below the elevation of the edge of the overexcavation Hole the reclamation topography <br />will drastically deviate from the mining topography. Where steep, benched walls that formed <br />the sides of the Hole once were, the backfilling process will produce an almost level platform <br />above the Hole. For more details on this please refer to the Grading section of the Reclamation <br />Plan (Exhibit E). <br />• <br />Page 28 Pikeview Quarry Amendment Exhibit D <br />
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