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2019-07-11_PERMIT FILE - M2019027
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2019-07-11_PERMIT FILE - M2019027
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Last modified
1/6/2025 2:18:52 AM
Creation date
7/11/2019 2:03:41 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2019027
IBM Index Class Name
PERMIT FILE
Doc Date
7/11/2019
Doc Name
Adequacy Review Response
From
Colorado Sand Company
To
DRMS
Email Name
PSH
Media Type
D
Archive
No
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C-16 r1 <br /> supervisory pickup truck travel, and mined/processed material movement throughout the plant area(e.g., <br /> in-pit haul ramp and haul segment to ROM stockpile). <br /> While these areas may be graded prior to plant assembly, the areas will not be pre-stripped of growth <br /> medium. They will; however,be subject to regrading and revegetation during site reclamation activities. <br /> CSC acknowledges that these areas may require routine re-grading and/or water application (as a dust <br /> suppressant) during the operational duration of the mine and plant operations. Such activities will be <br /> employed, as warranted. <br /> Mine Pit: <br /> The main mine pit will be roughly rectangular in shape (longitudinal axis oriented west to east), with a <br /> nominal length of 575 ft., width of 235 ft. and a projected depth limit of approximately 25 ft. to 30 ft., <br /> dependent on existing topography. Pit sidewalls will be maintained at a nominal 3H:1 V slope, which is <br /> anticipated to be roughly equivalent to natural angle of repose of the material after exposure from <br /> excavation activities. <br /> As earlier discussed in Item(d), above,the pit floor or invert elevation, as proposed, is to be established at <br /> 4,880 ft. amsl (+/- 2 ft.). Given that surface topography across the main mine pit footprint, in the pre- <br /> mining condition,ranges from a"high"of 4,910 ft. amsl(in the south central portion of the pit)to a"low" <br /> of about 4,905 ft. amsl (in the northeastern portion of the pit), the nominal (true) mining depth will, by <br /> necessity,range from 25 ft.to 30 ft. <br /> CSC shall retain the right to mine to greater depths, in the event incremental resource is present and <br /> recoverable within design limitations, and market conditions warrant doing so. However, any prospective <br /> "deepening"of the main mine pit would be prefaced by the submittal(and Division approval)of a Technical <br /> Revision,in advance of doing so. <br />
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