2014-06-18_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 6/18/2014
• Doc Name: Weekly CQA Report- Weeks ending 05/31/14 and 6/7/14.
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

amelt, f
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 loaded tandem trucks with stockpiled material from various locations
throughout the PSSA floor. The material was hauled to the northern half of the PSSA floor and
placed as structural fill.
A Cat dozer pushed material down from Dump 4 to stations M28+00 to M30+00 where it was
placed as structural fill.
A Cat GPS dozer performed rough grade subgrade preparation in the Phase 1 area above
Bench A between approximate stationing A6+00 to A7+00.
A Cat hammer-hoe broke oversized material in the subgrade downslope of stations A6+00.
A Cat 320 hammer-hoe broke oversize materials and cut the ADR 'h : 1 slope at the 9,450 bench
for additional bench access. Excess material was removed stockpiled at the south end of the'/:
1 slope for later removal.
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.
The following subgrade areas in the PSSA were compacted to finished grade, inspected and
certified for soil liner fill (SLF)placement:
The ADR platform
From the A Bench (9,450 elevation)to the PSSA floor between approximate stations
AO+00 to A4+00
The closure drain area
See the attached subgrade acceptance map for all accepted subgrade locations.
Concrete was poured after concrete forms and reinforced steel were constructed for the collars at
the closure drain area. Soil liner fill was then placed and compacted with a plate tamper and
smooth drum roller. The protective steel casings from around the PVC piping were cut off flush at
the concrete collars. AMEC observed the placement of bottom layer of 12 oz. non-woven
geotextile, the placement of the schedule 80 PVC 2-inch-diameter well screen(slot size 0.020),
and leak detection fill over the schedule 80 piping within the closure drain floor after the soil liner
fill was inspected and certified. Approximately 1,558 cubic yards of underdrain fill were hauled in
and placed on the geotextile and leak detection fill in the closure drain area.
Soil liner fill was inspected and certified in the closure drain area, specifically the one foot thick
SLF layer below the actual closure drain. Note: there will be another SLF acceptance for the 3
foot layer above the closure drain as well. See the attached SLF acceptance map for all
accepted locations.
Soil liner fill 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.
Soil liner fill was placed in a loose lift approximately 1.5 feet thick on the approved subgrade by
Cat GPS dozers and 740 Haul Trucks.
SLF fininishing and contouring occurred on the SLF at the western PSSA slopes below stations
A2+00 to A4+00.
2014.06.07-m1e2 weekly final Page 2 of 7