2003-12-03_REVISION - M1977342

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 12/3/2003
• Doc Name: Memo To File-Geomembrane Damage in Pond 1.2 ‎(Sludge Disposal Pond)‎
• From: DMG
• To: File
• Type & Sequence: TR8
• Media Type: D
• Archive: No

STATE OF COLORADO
Fr nn^•. DIVISION OF MINERALS AND GEOLOGY
Department of Na[ural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
R-~,/
COLORADO
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION•MINING
SAf ETY•SCIENCE
40'
,/ MEMO TO FILE
Date: 12/3/03"
Specialist: Allen Sorenson Signed:
Subject/Operator/Operation/File No. Geomemt

Type of Interaction: Meeting Phone Other
Bill Owens
Governor
Greg E. Walther
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
r/
Person(s) contacted and affiliation: Tony Lucero. Henderson Mine. 303/569-3221 ext. 1287
Summary and Resolution of Interaction:
On October 6, 2003 Anne Beierle at the Henderson Mine telephoned in a report that the geomembrane in Pond
1.2 had been ripped. Pond 1.2 was approved through technical revision TR-008 to be an Environmental
Protection Facility for disposal of dewatered high-density water treatment sludge generated at the Urad water
treatment plant. The rip occurred when a load of sludge was dropped onto the liner at a location where the liner
was tightly stretched and there was an air pocket beneath the liner (between the geomembrane and the substrate).
The rip is high on the side slope of the pond so there is substantial freeboard between any sludge or liquid in the
bottom of the pond and the location of the liner damage. No sludge or liquid escaped the containment of the
liner as a result of the damage. It was agreed that Henderson would file a written report in accordance with Rule
8 of the Mineral Rules and Regulations once the liner had been repaired.
On November 25, 2003 Tony Lucero at the Henderson Mine left a voice message stating that Colorado Lining
Company, the original liner installer, had been contacted to repair the liner. Colorado Lining recommended that
the repairs not be undertaken in the winter conditions at the mine. The repairs will be made in the spring of
2004. Tony reiterated that the rip in the liner does not compromise Pond 1.2 as an Environmental Protection
Facility due to the location of the rip high on the side slope of the pond.
The Division of Minerals and Geology (DMG) agrees that the rip repairs should be done in the spring under
suitable weather conditions. Once the repairs are completed, Henderson must provide DMG with a report
describing the repairs and documenting the seam and liner integrity testing conducted. The report must also
include a revised sludge-dumping plan that will prevent similar incidents in the future.
cc: Tony Lucero, Henderson Mine
Carl Mount, DMG (via email)
C:WCS\LOANER MACHME\MY DOCUMENTSWENDERSON POND 1 2 GEOMEMBRANE DAMAGE MTF.DOC
Office of Office of Colorado
Mined Land Reclamation Active and Inattive Mines Geological Survey