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2012-02-28_REVISION - M1980244 (104)
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2012-02-28_REVISION - M1980244 (104)
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Last modified
8/24/2016 4:49:09 PM
Creation date
3/9/2012 9:33:41 AM
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
REVISION
Doc Date
2/28/2012
Doc Name
VOL. 1, Exhibit U
From
CRIPPLE CREEK & VICTOR GOLD MINING COMPANY
To
DRMS
Type & Sequence
AM10
Email Name
TC1
Media Type
D
Archive
No
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6.2.6 CIP Circuit <br />In the CIP circuit, the ground flotation concentrate and dilute sodium cyanide solution <br />will be in contact with activated carbon. The gold will attach, or adsorb, onto the <br />carbon. The CIP circuit consists of eight tanks. Each of the eight tanks will be equipped <br />with agitators to promote mixing of the slurry /dilute sodium cyanide solution with the <br />activated carbon and allow the gold in solution to adsorb onto the carbon. Pump cells <br />will allow the transfer of slurry from tank to tank without transporting the activated <br />carbon. The slurry will move through all of the tanks and will be discharged from the last <br />tank, screened to remove any carbon particles that have escaped with the slurry, and sent <br />to a thickener for water recovery. Once the slurry has been thickened, the water will be <br />recycled back to the leach circuit pH adjustment tank for reuse. The slurry will be sent to <br />the agglomerator for agglomeration as described in Section 6.2.3. <br />On a regular timed basis, the carbon in each CIP tank will be removed and hauled by <br />truck within double -lined containment vessels to the AGADR where the carbon will be <br />further processed to recover the gold. The carbon will be screened to remove slurry <br />particles, washed, and loaded into a tank truck. The carbon will be regenerated at the <br />AGADR and returned to the High Grade Mill CIP circuit for reuse. Any slurry screened <br />from the carbon will be pumped back into the CIP circuit. <br />6.3 Construction <br />6.3.1 High Grade Mill Facilities Platform <br />The High Grade Mill facilities construction will begin with the placement of overburden <br />within the SGOSA High Grade Mill facilities platform to the elevation required in the <br />platform design. The overburden placement to form the platform will occur in <br />approximately five to ten -foot lifts. Each lift will be compacted before the next lift is <br />placed. Note that the placement of overburden in the SGOSA, including in the area of <br />the platform, is currently approved. Once the appropriate grade is reach, a one —foot layer <br />of SLF will be placed. The soil liner fill will consist of material which will come from <br />the clay borrow areas shown on Drawing C -4 and will have a maximum permeability of <br />l x 10 -6 centimeters per second ( "cm /sec "). An 80 -mil single -sided textured (textured face <br />down) LLDPE geomembrane liner will be placed on top of the SLF. Installation of the <br />liner will have the same restrictions related to weather conditions as approved for liner <br />installation related to the AGVLF. Specifically, these criteria set out temperature or <br />precipitation conditions that would require a temporary halt of liner deployment. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension 2 <br />6 -7 <br />
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