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2019-12-13_REVISION - M1980244 (68)
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2019-12-13_REVISION - M1980244 (68)
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Entry Properties
Last modified
5/28/2020 2:05:04 PM
Creation date
12/16/2019 1:01:57 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Revision
Doc Date
12/13/2019
Doc Name Note
Applicaiton, Exhibit A - J
Doc Name
Request For Amendment To Permit (Vol. I of IV) Part 1
From
CC&V
To
DRMS
Type & Sequence
AM13
Email Name
TC1
MAC
BFB
ERR
JPL
Media Type
D
Archive
No
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NEWMONT <br />GOLDCORP.. <br />The East Cresson mine area is expected to be backfilled to promote free drainage of stormwater <br />to the surrounding natural ground surface as previously approved for MLE - Amendment 9 and <br />MLE2 - Amendment 10. This backfilling will include the Wildhorse Extension (WHEX) portion of <br />the East Cresson mine area. Backfilling will be accomplished by end -dumping the material in lifts <br />that range in height, depending on the logistics of truck hauling, the geographic locations relative <br />to the mine area and overburden placement scheduling. The maximum lift height for backfilling <br />the East Cresson WHEX will be 300 feet. It is anticipated that this area will be backfilled to an <br />elevation and shape that will promote free drainage of stormwater to the surrounding surface and <br />graded to blend with the surrounding topography including the reclaimed topography of the <br />ECOSA. <br />As approved in TR -96 the stormwater drainage flow -line in the WHEX backfill will be graded at <br />1.5% away from the grassy valley. Stormwater will be directed west, through the constructed <br />backfill, back into the remaining portion of the mine pit. <br />The final reclaimed surface of the East Cresson Mine area will be graded to conform to the <br />stormwater runoff patterns discussed previously approved. A discussion of diversion/conveyance <br />channels and detention basins for the final backfilled East Cresson Mine area configuration also <br />is provided in Section 1.5.7. <br />Cresson Underground Mining <br />The surface disturbance associated with future underground operations per TR -116 will be <br />reclaimed in accordance with similar reclamation practices described above. Portal access will be <br />secured, surface features will be dismantled, and the disturbed area will be revegetated according <br />to the practices described in Section 1.3.2 above. Disturbances associated with exploration <br />underground activities will be reclaimed as described in (TR -116). <br />1.5.3 VLF1 & VLF2 <br />Reclamation procedures of both the VLF1 and the VLF2 will occur as previously approved under <br />Amendment 9 for VLF1 and Amendment 10 for VLF2. The VLFs will be rinsed, slopes will be <br />regraded, soil will be placed, and revegetation performed. Each of these steps is discussed below. <br />Active leaching for gold recovery is expected to be completed for the VLF1 in approximately 2028, <br />and for the VLF2 in approximately 2038. After completion of active leaching, the VLFs will be <br />rinsed in the same manner as previously approved. Two rinsing cycles, using recirculated solution <br />and fresh water, will require about 30 months to complete. It is proposed this will be followed by <br />a hydrogen peroxide (H2O2) assisted rinsing cycle, to complete removal of cyanide (the need for <br />this H2O2 rinse will be evaluated during VLF rinsing). The financial warranty is based on two <br />Cripple Creek & Victor Gold Mining Company Exhibit E <br />Cresson Project Amendment 13 <br />12 <br />
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