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GENERAL45928
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GENERAL45928
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Last modified
8/24/2016 8:16:26 PM
Creation date
11/23/2007 2:11:48 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981048
IBM Index Class Name
General Documents
Doc Date
4/8/1983
Doc Name
TRINIDAD BASIN MINING C-048-81
From
AMERICAN MATERIAL INC
To
MLR
Permit Index Doc Type
STIPULATIONS
Media Type
D
Archive
No
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<br />Response to Stipulation i7o. 15 <br />Pit No. 1, 2 and(3)hav~e,been mined <br />original contour ith a negligible <br />being left over, thus no permanent <br />required. <br />and reclaimed to the approximate <br />balance of excess material <br />overburden storage areas were <br />Table V-1 as corrected in response to stipulation No. 14 outlines <br />the mining operation sequence which begins with Pit No. 5 as follows: <br />The excavation from the first cut is moved to temporary overburden <br />stockpile 4110. After the coal from the first cut is removed the <br />worked-out cut is backfilled with material from the second cut <br />proceeding in this manner to the last cut in the pit which is <br />backfilled with the material stored in overburden stockpile 4110 <br />and excavation from the first cut in pit 414. Then the balance of <br />the material wxcavated from this first cut is moved to temporary <br />overburden stockpile 418. After the coal from this cut is removed <br />the worked oiit cut is backfilled with material from the second cut <br />proceeding in this manner to the last cut which is backfilled with <br />the material stored in overburden stockpiles 418 and 119. The <br />projected backfill material balance deficit in pit 114 is 55,100 c.y. <br />which will result in the entire backfilled pit area being an average <br />of 0.5' lower than the original premining contour and is a negiligble <br />difference. <br />Calculations are as follows: 55,100 c. x 27 0,5' <br />6 .5 ac x 5 <br />As the cuts vary in size, excess material not needed to backfill <br />the cut behind will be temporarily stored on the cut area ahead <br />with the cumulative balance as shown in corrected Table V-1 <br />descreasing to balance with the last cut in each pit. <br />As there are no permanent overburden stockpiles and the pit areas <br />are reclaimed to the approximate original contour with sediment <br />ponds and haul roads being removed there is no change in the post- <br />mining topography from the premining topography with the exception <br />of the haul road to Pit $1 which is being reduced to trail width <br />as outlined in the response to stipulation No. 16 with the location <br />being shown on the corrected post-mining topographic map V-4. <br />
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