2014-06-24_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 6/24/2014
• Doc Name: Weekly CQA Report: Week ending 06/14/14.
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

amec
transported to the buttress fill area upslope of stations J12+00 to J14+00 and downslope of
stations J16+00 to J20+00 where it was placed as structural fill by Cat dozers.
A Cat 330 excavator hammered oversized rock on the northern slope of the PSSA.
Subgrade slope finishing and contouring occurred at various locations below elevation 9,450 on
the PSSA slopes. Excess cut was stockpiled at the toe of the slope for later removal.
A Cat smooth drum roller compacted subgrade in various areas within PSSA and surrounding
Phase 1 slopes.
A Cat excavator continued anchor trench excavation on the 9,450 elevation above the ADR
Platform.
Subgrade:
The following subgrade areas in the PSSA were compacted per project specification to finished
grade, inspected and certified for soil liner fill (SLF)placement:
The PSSA embankment
From the A Bench (9,450 elevation)to the PSSA floor between approximate stations
A4+00 to A8+00
From the B Bench (9,450 elevation)to the PSSA floor between approximate stations
BO+00 to B6+00
See the attached subgrade acceptance map for all accepted subgrade locations.
Note: An AMEC field professional monitored structural fill material temperatures placed within the
fill areas. Average structural fill temperatures were above 32°F.
Soil Liner Fill (SLF):
SLF was placed and compacted per project specification; then, inspected, tested and certified in
compliance with technical specifications in the following areas:
Closure drain area; specifically the 3 foot layer above the closure drain.
ADR Platform and from STA AO+00 to A5+00 and downslope to the PSSA floor.
See the attached SLF acceptance map for all accepted locations.
SLF from the Squaw Gulch stockpile was hauled to the southern PSSA floor and western inboard
slopes. The material was placed on the approved slope subgrade and placed as fill and also
stockpiled on the PSSA floor for later use in the area.
SLF was placed in a loose lift approximately 1.5 feet thick on the approved subgrade by Cat GPS
dozers and 740 Haul Trucks.
SLF finishing and contouring occurred on the SLF at the western PSSA slopes and across the
PSSA embankment.
Note: An AMEC field professional monitored SLF material temperatures placed within the fill
areas. Average SLF temperatures were above 32°F.
SLF Processing:
Cameron Site: No soil liner fill mining or processing occurred at the Cameron Site.
Approximately 244,860 tons of SLF material has been produced and remains stockpiled at the
Cameron Site for future use.
Squaw Gulch Borrow Site: Soil liner fill mining and processing was completed at the Squaw
Gulch Clay Borrow Site (the source was depleted). Approximately 143,198 tons of soil liner fill
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