2011-09-30_REVISION - M1977342 ‎(7)‎

• Permit No: M1977342
• IBM Index Class Name: REVISION
• Doc Date: 9/30/2011
• Doc Name: TR Approval
• From: DRMS
• To: Climax Molybdenum Company
• Type & Sequence: TR9
• Email Name: PSH
• Email Name: TAK
• Media Type: D
• Archive: No

DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
September 30, 2011
Mr. Miguel Hamarat
Climax Molybdenum Company
Henderson Mill
P.O. Box 68
Empire, CO 80438
Re: Climax Molybdenum Company, Henderson Mine, Permit No. M- 1977 -342
Technical Revision No. TR -09 Approval
Dear Mr. Hamarat:
As requested by the Division of Reclamation, Mining and Safety (Division /DRMS) during the August
23, 2011 meeting at the Henderson Mill, Climax Molybdenum Company (CMC) provided an
additional copy of the following documents related to Technical Revision No. 9 (TR -09) of the
Henderson Reclamation Permit.
Mined Land Reclamation
• 2 -Dam Grouting and 3 -Dam Seep Water Management
STATE OF COLORADO
Stipulation No. 1–Technical Revision 9
The 3 -Dam seepage pipelines will not be put into service until the Division has issued
written acceptance of the certification of the facility as required under rule 7.3.2(2)
of the Hard Rock /Metal Mining Rules and Regulations. The certification shall be
accompanied by a construction report that will detail the installation of the pipeline,
including pipe and valve specifications, a description of the inlet structures, seepage
barriers and south dike reconstruction, a description of any problems that occurred
and their resolution, and a description and test results of pipeline integrity testing.
Stipulation No. 3 –Technical Revision 9
Within 60 days of completion, a grouting report will be provided for the 2 -Dam
decant system grouting operation. The report will detail the installation of the
grout, include a description of any problems that occurred and their resolution, and
will include compressive strength test results from the cured grout samples.
COLORADO
D I V I S I O N O F
RECLAMATION
MINING
—&—
SAFETY
John W. Hickenlooper
Governor
Mike King
Executive Director
Loretta Pineda
Director
The purpose of TR -09 was to grout a portion of the abandoned 2 -Dam Decant System and to install
parallel gravity lines to route No. 3 -Dam seepage to the No. 1 -Dam seep water collection system.
The following stipulations were imposed by the Division:
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