2014-02-07_REPORT - M1980244 ‎(2)‎

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 2/7/2014
• Doc Name: Response to weekly CQA adequacy
• From: CC&V
• To: DRMS
• Email Name: TC1
• Email Name: TAK
• Media Type: D
• Archive: No

"M
Clay (SLF) Processing:
Cameron Site: No clay mining or processing occurred at the Cameron Site. Approximately, 244,860 tons of clay /
soil liner fill (SLF) material have been produced at the Cameron site. SLF produced from the operation remains
stockpiled at Cameron Site for later removal / use.
Seven test pits were dug south of the Cameron area to locate further sources of clay. The test pits were excavated
using a Cat 320 excavator and ranged from 6 feet to 10 feet in depth. Clay was sampled from one of the test pits
for laboratory analysis (the rest of the test pits did not have useable amounts of clay).
Squaw Gulch Clay Borrow Site: Clay processing took place at the Squaw Gulch Clay Borrow Site.
Approximately, 21,900 tons of soil liner fill material has been produced at the Squaw Gulch Clay Borrow Site to
date.
A Cat 345 and a John Deere 870 excavator were used to load Cat 777 haul trucks with clay till at the upper portions
of the Squaw Gulch Clay Borrow area. The till was transported to lower portion of the borrow area for processing.
Underdrain System:
Secondary Underdrain: No secondary underdrain was installed during this reporting period. Approximately, 5,064
feet of secondary underdrain has been completed to date in the VLF.
Primary Underdrain: No work was performed on the primary underdrain during this reporting period. A total of
1,294.60 feet of primary underdrain has been completed.
Tree /Slash Grubbing and Clearing, Chipping:
No clearing and grubbing occurred.
B) Underground Workings
UG U6397: Unknown Surface Working.
The working was blasted.
UG 6123: Collapsed Stope.
A Cat 330 excavator removed blasted material from the working.
C) Historical Crib Wall / South MSE Wall:
A Komatsu excavator was used to remove material from the back side of the crib wall to expose timbers to be used
for the facade at the south MSE wall. No timbers /panels were removed.
11) Storm Water Management
Best Management Practices (BMP) is being performed. Erosion control efforts took place during this reporting
period following any precipitation (Snow removal).
CQA ACTIVITIES:
1) Field Activities: Observation of construction activities during this reporting period included: Slope grading and fill
placement; Underground working basting and remediation; Production drilling and blasting; Tailings removal at the
historic Crib Wall; Test pitting for clay sources; and Clay (Soil Liner Fill —SLF) and Drain Cover Fill (DCF) processing.
11) Laboratory Activities: Laboratory testing continued with Permeability, Particle Size Distribution, Atterberg Limits,
Moisture - Density, gradations and material classification and identifications and field material sampling were performed
during this reporting period.
SLF Sample Number 80 -S was collected and returned to Amec's laboratory for analysis.
Page 2 of 6 MLE2 WE 4Jan14.doc