2001-11-08_REVISION - M1977342

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 11/8/2001
• Doc Name: MEMO PRESSURE TESTING OF 3 DAM SEEP LINE
• From: DMG
• To: FILE
• Type & Sequence: TR9
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman 51., Room 215
Dcnver, Colorado BO203
Phone: [phone]
FAx: [phone] MEMO TO FILE
Date: 11/08/2001 11:48:56 AM
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Specialist. Allen Sorenson Signed:
Subject/Operator/Operation/File No. Pressure Testine of 3-Dam See~Line,
Climax Molybdenum Company. Henderson Mill, Permit No. M-77-343
Type of Interaction: Meeting Phone Other
Person(s) contacted and affiliation: Erich Bower, Environmental Coordinator, Henderson Mill.
303/569-3221, ext. 2214, fax: [phone]
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MI NING•SAFETY
Bill Owens
Governor
Greg E. Walther
E>ecuevc Direcor
hLChael B. Long
Dirision Director
Summary and Resolution of Interaction: Mr. Bower left a voice mail stating that the required annual
pressure testing for the 3-Dmn seep lines has come due, but [ha[ there is insufficient Flow in the lines at [his
time to complete a presure Zest without the need to adil water from tanker h'ucks. One pocsihlc e~hlnnaliDn
for the very low Flow in the pipelines a[ this time is that 3-Dam seepage has diminished as a result of the
pipeline installation and elimination of the old seep water pump back system. The minimization of seepage
through elimination of the pump back system was one of the goals of [he 3-Dam project. Henderson Mill
requests that the annual pipeline integrity testing be rescheduled for the spring of 2002, and will be conducted
each spring [hereafter to assure [hat the testing occurs at the time of high Flows in the 3-Dam seeps coinciding
with snowmelt. The Division of Minerals and Geology agrees that springtime is more suitable for pipeline
testing, and hereby defers the pipeline integrity testing requirement to next spring and each spring [hereafter.
If for any reason the testing cannot be completed by June 30 each year, the Division must be contacted for
consultation and deadline extension approval.
As to whether or not Henderson Mill should test the pipelines now in order to maintain annual frequency, [hen
switch to springtime testing in 2003, [he Division does no[ believe this is necessary for the following reasons:
• The pipelines have only been in service for one year, and passed the initial pressure testing.
• The Flow in the pipelines over the winter will be slight.
cc: Erich Bower, Henderson Mill, (via fncsirnrle rranrrnissiun)
Carl Mount. DMG (via elecrrorrrc nrniO
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