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2016-11-07_REVISION - M1977342
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2016-11-07_REVISION - M1977342
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Last modified
12/10/2020 2:27:38 PM
Creation date
11/8/2016 9:32:05 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977342
IBM Index Class Name
Revision
Doc Date
11/7/2016
Doc Name
Request for Technical Revision
From
Climax Molybdenum
To
DRMS
Email Name
PSH
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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Mr. Peter Hays, DRMS <br /> November 2016 <br /> 2. The qualified registered professional engineer shall, within 20 working days after each inspection, <br /> provide to the Division a certified report verifying the impoundment has been constructed and/or <br /> maintained as designed, and in accordance with the approved plan and the applicable <br /> regulations. A copy of each certified report shall also be maintained at or near the mine site and <br /> available for review. <br /> Response: The Engineer of Record report described above will be provided to the Division as an <br /> attachment to the Annual Reclamation Report. The Engineer of Record will also verify that the <br /> impoundment has been constructed and/or maintained as designed, in accordance with approved <br /> plan and regulations A copy of each certified report shall also be maintained onsite and be <br /> available for review. <br /> 3. The annual certified inspection report for the tailings impoundment shall include discussion of, but <br /> not limited to, the following: <br /> • Any appearance of erosion, instability, structural weakness or other hazardous conditions; <br /> • Existing and required monitoring procedures and instrumentation; <br /> • The depth and elevation of any impounded waters or fluids at the time of the certified report; <br /> • Existing storage capacity of the tailings impoundment; <br /> • Any other aspects of the structure affecting stability, or requiring maintenance; <br /> • Appropriate demonstrations as necessary to verify the impoundment is compliant with <br /> applicable requirements of the Office of the State Engineer. <br /> Response The annual certified inspection report for the tailings impoundment shall include <br /> discussion of, but not limited to, the following. <br /> • Instability, structural weakness or other hazardous conditions',- <br /> Existing and required monitoring procedures and instrumentation,- <br /> Any other aspects of the structure affecting stability, or requiring maintenance,- <br /> Demonstration, as necessary, to verify impoundment is compliant with professional <br /> engineering judgment for impoundments of similar size and/or capacity. <br /> 4. The tailings impoundment shall be inspected at least monthly from spring to fall annually, by a <br /> qualified person designated by the Operator, for appearance of structural weakness, other <br /> hazardous conditions and evaluation of piezometer readings. The report generated from the <br /> monthly inspection shall be retained at the mine site and a copy of the report shall be submitted <br /> to the Division on a monthly basis. <br /> Response: The tailings impoundment shall be inspected at least monthly from spring to fall each <br /> year by a qualified person designated by the Operator, for appearance of structural weakness, <br /> other hazardous conditions and evaluation of piezometer readings. The reports generated from <br /> the monthly inspections shall be retained onsite and will be available to the Division at their <br /> request. The inspections shall continue until formal cessation of operations, following which the <br /> tailing impoundments shall be inspected annually as defined above. <br /> 5. If any inspection indicates a potential hazard exists, the Operator shall within 24 hours inform the <br /> Division of the finding and of the emergency procedures formulated for public protection and <br /> remedial action. If adequate procedures cannot be formulated or implemented, the Division shall <br /> be notified immediately. If the Operator has knowledge of a failure or imminent failure of the <br /> impoundment or embankment the Operator shall follow the emergency notification procedures of <br /> Hard Rock Rules 8.1 and 8.2. <br /> ' Climax distinguishes seasonal erosion on the surface of the tailings dam face,a normal process handled with <br /> routine operations and maintenance activities, from that which would be called a hazardous condition. <br />
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