2003-05-09_REVISION - M1980244 ‎(2)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 5/9/2003
• Doc Name: PSSA Liner Repair
• From: CC&V
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

Golder Associates Inc.
44 Union Boulevard, Suite 300
Lakswootl, CO USA 80228
Telephone [phone]
Fpx 6303) 985-2080
May 7, 2003
Cripple Creek & Victor Gold Mining Company
P.O. Box 191
1280 State Highway 67
Victor, Colorado 80860
Attention: Mr. Ron Roberts
RE: PSSA LOW ER GEOMEMBRANE LINER REPAIRS
Dear Ron:
~ Wl~l
ASSOCITL~S
Our Ref: 003-2203
Golder Associates Inc. (Golder) has prepared this letter report for the Cripple Creek & Victor Gold
Mining Company (CC&V) summarizing the recent liner repair work completed on the lower
geomembrane liner in the Phase IV Valley Leach Facility (VLF) Pregnant Solution Storage Area
(PSSA). The liner repair work was required in the PSSA to repair damage from two separate
incidents:
On January 20, 2003, a Caterpillar D9 wide pad dozer blade damaged the lower 100-mil
single sided textured geomembrane in the PSSA, creating puncture and scratch penetration to
[he geomembrane panels L-351, L-354, and L-355. Ames used a Caterpillar 330 excavator
and several laborers on January 20 and 21 to remove LVSCF from the area where the
geomembrane damage occurred. This incident was documented by Golder and reported in
Weekly Report No. 9.
On or around April ~, 2003, a rock rolled into the PSSA, near the riser sump location. The
rock created puncture penetration to the lower 100-mil double sided textured geomembrane
of panel L-426, on the 2H:1 V PSSA slope, and the lower 100-mil single sided textured
geomembrane of panel L-436, in the PSSA bottom. This incident was documented by Golder
and reported in Weekly Report No. 13.
The following sections provide details of the liner repair work completed in the PSSA. All liner repair
work was completed in accordance with the project technical specifications. All work was observed
and documented by the Golder Resident Engineer (Mr. Ron DiDonato), and the Golder Lead
Geosynthetics Inspector (Mr. Greg McQuaid). The Golder Engineer-of-Record (Mr. John F. Lupo)
was also on-site during this time and inspected the repair work.
DOZER DAMAGE REPAIRS
The liner damage resulting from the dozer incident consisted of puncture penetration and scratch
penetration on panels L355, L354, and L351 (see Figure 1). At the time of incident, PolyFlex was not
on-site; therefore interim liner repairs were completed by CC&V personnel to prevent further
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