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2019-01-04_REVISION - M1994117 (3)
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2019-01-04_REVISION - M1994117 (3)
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Last modified
1/5/2025 2:27:52 AM
Creation date
1/4/2019 4:14:46 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1994117
IBM Index Class Name
Revision
Doc Date
1/4/2019
Doc Name
Adequacy Review Response #2
From
Colorado Milling Company
To
DRMS
Email Name
MAC
AME
Media Type
D
Archive
No
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standing water was observed outside the entrance to the Hazel A adit and within the opening. <br /> Please explain this discrepancy. What has been done to ensure zero discharge at the Hazel A <br /> adit? <br /> CMC Response: The standing water observed outside the Hazel A adit was caused by <br /> intermittent rain water and snowmelt collecting in the depression between the Cash Mine access <br /> road and the entrance to the Hazel A adit. This depression was recently leveled by an employee <br /> of CMC. The Hazel A mine is not discharging water and a discharge permit is not necessary for <br /> the Hazel A Mine. <br /> 21) The operator's response to item no. 30 states the mill originally used standard flotation <br /> reagents to process ore from the Cash Mine dump, including pine oil, soda ash, and a xanthate. <br /> However,the operator anticipates using different flotation reagents in the future to improve <br /> recovery. The Division will continue to review the Designated Mining status of this operation <br /> and will formally notify the operator under separate cover of any determination that the operation <br /> is, or has a reasonable potential to be, a Designated Mining Operation, in accordance with Rule <br /> 7.2.2. Please be advised, an approval of this amendment application would not authorize the <br /> operation to store or use designated chemicals on site. <br /> CMC Response: CMC understands that an approval of this Permit Amendment Application <br /> would not authorize the operation to store or use designated chemicals on site. <br /> 22) The operator's response to item no. 31 states the operation anticipates processing batches of <br /> 500 tons of material from the Cash Mine stockpile to determine which combination of reagents <br /> will be used during initial milling operations; and that once a combination of reagents that results <br /> in the best recovery has been determined from these mill tests, these reagents will be used during <br /> future processing operations. Please refer to the Division's comments in item no. 21 above. <br /> Approval of this amendment application would not authorize the operation to store or use <br /> designated chemicals on site. Prior to conducting such activities at the site (including smaller <br /> scale operations), the operation must first be converted to a Designated Mining Operation <br /> through submittal and Division approval of the appropriate application. <br /> CMC Response: CMC expects to convert the Gold Hill Mill to a Designated Mining Operation <br /> through submittal and DRMS approval before conducting any milling operations. <br /> Exhibit D—Reclamation Plan (Rule 6.3.4): <br /> 23) The operator's response to item no. 32 corrected the permit number referenced in the <br /> reclamation plan to M-1994-117. However, the response did not specify where in the referenced <br /> permit file the pertinent documents may be found, as required by Rule 1.10(2). Please specify <br /> where this information can be found in the permit file or provide the mill site reclamation plan <br /> with your response. <br /> 11 <br />
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