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REV101798
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REV101798
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Entry Properties
Last modified
8/25/2016 1:12:19 AM
Creation date
11/22/2007 12:49:08 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Revision
Doc Date
1/18/1995
Doc Name
FAX COVER CRESSON PROJECT PN M-80-244 USE OF DETOXIFIED PAD MATERIALS
From
CRIPPLE CREEK & VICTOR GOLD MINING CO
To
DNR
Type & Sequence
TR12
Media Type
D
Archive
No
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<br />(See the two areas marked "FILL" on the Attachment.) Any surface drainage will be <br />directed either along the road to the Leach Pad or off the road into the Pond 5 and onto <br />the existing Carlton Mill Tailings area which area is contained by the tailings dam. This <br />road is temporary in that it will disappear as (1) pad loading moves to the east and north <br />and in that it will be removed during construction of the additional pad area to the west <br />of the existing Leach Pad. Sediment controls are those normally used for all haul roads <br />and, in this case, the off-road drainage can go nowhere other than onto the Carlton Mill <br />Tails where it will be contained and settled. <br />(2) use as a road base on the existing and planned haul roads that will service the mine. <br />The roads as they are currently evolving within the Mine and as planned to extend <br />outside the Mine area are shown on Attachment 2. The Pad ftl and Pad k2 material is <br />an excellent, well-sorted road base that will help to reduce fire wear and to control dust <br />by providing a medium for incorporation of dust control materials and reducing the fines <br />that are generated by the overburden currently in use. Again, the sediment controls are <br />those that are an integral part of our permit and procedures, with runoff controlled by <br />the diversions with which you are intimately familiar, supplemented by revegetation, road <br />ditches, settling areas, and sediment barriers. Some of this road base material will <br />become waste material or even ore as the in-Mine roads are revised and the Mine is <br />extended. <br />(3) use as stemming material for blast holes. A map showing the Mine area and, <br />therefore, the area to be drilled and where holes are to be stemmed is included as <br />Attachment 3. The area involved is circumscribed around the designations "North Pit" <br />and "South Pit." The size and well-sorted nature of the Pad !tl and Pad ii2 material <br />make it most suitable for stemming blast holes. This material will, after being subject <br />to moderate heat from the blasting, become either ore or waste, depending on where it <br />is used inside the Mine area. Sediment controls for areas to be blasted are those <br />provided by road configurations and by the fractured nature of the blasted rock. Not <br />only does very little runoff occur from these areas due to the tact they are fractured by <br />the blast, but the material remains in place for only a few days after blasting, at most. <br />Of course the waste or overburden will be hauled to the overburden storage areas where <br />sediment control is provided by temporary measures such as leaky dams, and by grading <br />and revegetation. Surface-water runoff from the ore is ultimately contained by the leach <br />pad and is contained at intermediate locations by control of spillage, surface-water <br />diversion, and settling of solids through straw bales, silt fences, grading, and <br />revegetation. <br />The material to be used is no different geologically than that which is being mined and, <br />according to the results of the meteoric water mobility tests, is benign with a slightly higher pH <br />than might be generated by non-leached rock as a result of the extensive lime addition. <br />All of the Pad ryl and the remainder of Pad N2 material was destined, under the approved <br />permit, for the overburden storage area in Arequa Gulch. Use of these materials as requested <br />2 <br />
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