2000-04-27_REVISION - M1977342 ‎(2)‎

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 4/27/2000
• Doc Name: 2 DAM DECANT GROUTING & 3 DAM SEEP WATER MANAGEMENT HENDERSON MILL TR09 PN M-77-342
• From: DMG
• To: CLIMAX MOLYBDENUM CO
• Type & Sequence: TR9
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
D~q>arlment nl Nalu ral Resources
I'S 1'S Sherman SL, Room ? 15
Denver, Colorado 80'03
Phune~ (:031 Nfi5-35fi7
FA%:13117183? 81 Uh
April 27, 2000
Mr. Erich Bower
Climax Molybdenum Company
19302 County Road #3
Parshall, CO 80468
RE: 2-Dam Decant Grouting and 3-Dam Seep Water Management, Henderson Mill,
Technical Revision TR-09, Permit No. M-77-342
Deaz Mr. Bower:
DIVISION OF
MINERAL S
GEOLOGY
REC LA MAiION
MININ G•SAFETY
RJI Owens
Governor
Creg E Wakher
Execmive Dueaor
Michael B. Long
Division Director
On Apri127, 2000 the Division of Minerals and Geology issued a conditional approval of the technical
revision application submitted to the Division on April 12, 2000 addressing the following:
Grouting a portion of the abandoned No. 2-Dam decant system and the installation of parallel
gravity lines to route No. 3-Dam seepage to the No. 1-Dam seepwater collection system.
The terms of the technical revision TR-09 approved by the Division are hereby incorporated into Permit
No. M-77-342. The conditions of the Division approval aze listed below. Please note that all other
provisions of Permit No. M-77-342 remain in full force and effect.
Stipulation No. Description
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 Hazd Rock/Metal Mining Rules and Regulations. The
certification shall be accompanied by a construction report that will detail the
installation of the pipelines, including pipe and valve specifications, adescription
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.
The 3-Dam seepage pipelines will be tested for integrity at least once per yeaz
and a description of the testing and results will be provided in the annual
reclamation report for the Henderson Mine and Mill
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