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2020-09-02_REVISION - C1981010 (3)
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2020-09-02_REVISION - C1981010 (3)
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Entry Properties
Last modified
9/3/2020 9:40:26 AM
Creation date
9/3/2020 9:28:21 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981010
IBM Index Class Name
Revision
Doc Date
9/2/2020
Doc Name
Adequacy Review Response
From
Trapper Mining Inc
To
DRMS
Type & Sequence
PR10
Email Name
RAR
JLE
Media Type
D
Archive
No
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each group of auger openings <br />8. Or, that the coal reserves have been depleted. <br />Trapper Response to Comments 6 to 8 - <br />Map M I OA, Mining and Re rade, show the high all mining areas for I & J Pits. No highwall face that will <br />be mined is more than 2,050 feet long, allowing for a 250 feet access panel both east and west of allpits that <br />are no more than 2,300 feet apart measured from the center of one access panel to the center of the opposite <br />side access panel. Currently with Map MI OA showing more than 1,100 -feet between mining panels for <br />eltlier I"Pit or J Pit there is plenty of roon-i between the two sets of pits to allow for a 250 foot wide access <br />corridor. <br />Revised Pages <br />DRMS August 2020 <br />DBMS notes that on revised Pg 3-44 Regrade of Boxcut Spoils,, in <br />paragraph one a change from 800,000 to 500,000 BCYs from Dec 2019 <br />revised pages for PI. <br />9. Does the change in CY's take into account both I and 3 its or only I Pit.? <br />Trapper Response to Comment 9: <br />`I"he Agapito Associates, Inc. report 'Re: E'va I u ation of I- an J--tP it Spoil Pile S tab I I ity, Trapper M i ne <br />discusses a spoil pile sized between 500,000 to 900,000 cubic yards. The gcoteclinical analysis <br />perfonned on the pile was for the maximum sized pile of 900,000 yards, which represents the worst-case <br />stability evaluation. In the bond calculation, with the mining plan in place currently, we believe it l'.11 <br />only be holding 5 8 9,95 0 yards of material at the end of 2022. <br />Please get back to us with any questions, comments or concerns, <br />Sincerely, <br />Forrest Luke <br />Environmental Manager <br />Trapper Mining Inc. <br />PFS -1 o binder <br />File 109.2.3.4 <br />
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