INSPEC17495

• Permit No: M1980244
• IBM Index Class Name: Inspection
• Doc Name: DMG MINERALS PROGRAM INSPECTION REPORT
• Inspection Date: 6/16/1995
• Media Type: D
• Archive: No

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(Page 2)
MINE ID f OR PROSPECTING ID f M-80-244
INSPECTION DATE 06/16/95 INSPECTOR'S INITIALS RCO
OBSERVATIONS
This partial inspection was performed by the Division because the site is a high-priority
site, requiring frequent presence by Division staff during days of operation. The date and
time of this inspection were known to the operator. The operator's representative named on
page 1 of this report met this inspector at the security office, before proceeding to the
area of operations.
The main activity observed during the inspection was the preparation of part of the Arequa
Gulch surfaces prior to deployment of the VLDPE liner. Immediately above the edge of the
exposed liner, which was being tested, was the location of a berm built for runoff control.
This berm had been removed prior to the inspection that day. A quantity of oversize material
was exposed after the area had been regraded, necessitating hand-picking of rock before the
surface was ready to accept liner material. The surface and compaction of the area was also
irregular, which necessitated some amount of filling and rolling.
This inspector observed a crew picking such material for over an hour. The upper edge of the
liner was swept free of large angular material, both above and below the membrane. The crew
hand filled small voids in the clay layer, using screened material. This was subsequently
rolled several times by wheeled roller. After each pass, the voids observed were filled by
manual placement of screened fill. Rocks were again picked after each rolling.
After a satisfactory surface was prepared, crews spread the fine "flour" material as a light
covering. This was then rolled also. During this period, a water truck was wetting the
area. This not only settled the dust, but also made the clay material so wet ae to stick to
the roller drum. Once this was discovered, that equipment ceased operation temporarily (20
to 30 minutes), until the surface was not sticky. The small voids created by rolling the
sticky material were filled by hand, and re-rolled.
The water truck, while descending the wetted hill slope on the south side of the gulch area
being prepared, braked to slow down, and slid on the slick clay. This had the effect of
creating shallow ruts, roughening the surface, and exposing rocky material. This elope was
beyond the area being intensively prepared that day, but this was pointed out to the operator
as an area to treat ae the operation proceeded uphill.
The bottom of the gulch, from 50 to 100 feet above the leading edge of the deployed VLDPE
liner, was (presumably) wetter and noticeably not well compacted. Initial passes with roller
and other equipment created ruts and ripples. This was also indicated to the operator during
the inspection.
The material being placed immediately on top of the VLDPE liner (to the north and south of
the area being prepared for liner deployment) was inspected for compliance with size
specification and depth.
If weather conditions indicated more rain was imminent, the operator assured this inspector
that the rain berm would be reconstructed to protect the liner and fill.
Other areas of the permit were not inspected. There were no problems observed during this
inspection.
I & E Contact Address cc: Jim Stevens /DMG
^ CE
NAME John Hardaway ^ BL
OPERATOR Cripple Creek and Victor Gold ^ FS
STREET PO Box 191 ^ HW
CITY/STATE/ZIP Victor CO 80860 ^ HMWMD (CH)
^ SE
cc: Pat Nelson ^ WQCD (CH)
Colo Dept of Health ^ OTHER
water Quality Control Div
4300 Cherry Creek Dr S
Denver CO 80222