2003-02-20_REVISION - M1980244

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 2/20/2003
• Doc Name: Construction Submittals
• From: CC & V
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

' Golder Associates Inc.
' ~ 44 Union Boulevard, Suite 300
Lakewood, CO USA 80228
Telephone [phone]
Fax [phone]
i
' ~
J
anuary 9, 2003
Cripple Creek & Victor Gold Mining Company
2755 State Highway 67
Victor, Colorado 80860
''
Attention: Mr. Ron Roberts
~~ ~ W~~~
®~.5~~~~
Our Ref: 003-2203.200
RE: 2002 ADR AREA CONSTRUCTION QUALITY ASSURANCE {CQA)
MONITORING
1
Deaz Ron:
The Cripple Creek & Victor Gold Mining Company (CC&V) requested geotechnical
Construction Quality Assurance (CQA) services to be performed by Golder Associates Inc.
(Golder) on a geomembrane expansion area near the ADR facility. Construction activities
were performed by Ames Construction Ino. (Ames) and Poly-flex Construction Inc.
(Poly-flex) during the period of November 27, 2002 through December 2, 2002. Golder
observed and documented construction activities including subgrade prepazation, Soil Liner
Fill (SLF) placement, anchor trench excavation, geomembrane deployment, and Drain Cover
Fill (DCF) placement.
Field earthworks testing was conducted by Golder on SLF placed in the ADR area. Soil
Liner Fill field testing of approximately 75 cubic yazds of SLF included monitoring of
placement and preparation for geomembrane deployment, testing in-place moisture and
density, and performing depth verification testing. Soil Liner Fill placement was performed
in accordance with the 2001 Phase IV VLF Construction Specifications. Results and
locations of field density and depth verification testing aze presented in Attachment A.
' Construction of the ADR azea in accordance with the 2001 Phase IV Construction
Specifications required excavation of approximately 98 feet of anchor trench along the
southeast side of the extension.
' Golder observed and documented the deployment, seaming, defect repair, and testing
(Destructive and Non-Destructive) of approximately 3,383 squaze feet of 80-mil single-sided
textured LLDPE geomembrane deployed by Poly-flex for the ADR liner extension. As-built
construction of the ADR azea geomembrane is shown in Figure 1. Geomembrane was
supplied and tested in accordance with the 2001 Phase fV VLF Construction Specifications
and was placed to complete the composite liner system. CQA observation records and test
results for the installation of geomembrane are presented in Attachment B.
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