2011-11-19_REPORT - M1980244 ‎(3)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 11/19/2011
• Doc Name: FINAL REPORT, VOLUME 2 OF 3 ‎(continued)‎ 2011 phase 5 valley leach facility ore storage 2 OF 3
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

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E) Overburden to Stockpile
1) VLF
Oversize rock within the Phase 5 VLF fill area was removed from fill and cut areas and hauled
to the overburden stockpile area east of the east perimeter road near stations A29 +00 ( + / -) to
A32 +00 ( + / -) right of centerline.
F) Cut to Fill
1) VLF
A CAT 385 excavator and a John Deere 850 excavator were used to excavate structural fill
material from the following areas: between stations E6 +00 ( + / -) and E9 +00 ( + / -),
approximately 50 left of centerline to 50 feet right of centerline; between stations E12 +00 ( + / -)
and E15 +00 ( + / -), approximately 100 to 150 feet right of centerline; between stations 171 +50
( + / -) and F2 +50 ( + / -), approximately 200 to 250 feet right of centerline; and between stations
1-13 +10 ( + / -) and H4 +75 ( + / -), approximately 250 to 275 feet left of centerline. The structural
fill material was loaded into CAT 777 and 40 -ton articulating haul trucks.
Prior to structural fill placement existing fill areas were ripped and frost was allowed to thaw
or was removed. Existing fill temperature were monitored and found to be above 32 °F before
fill placement. An AMEC representative monitored ambient temperatures on an hourly basis
during fill placement. Fill temperatures were monitored during ambient temperatures below
32'F and averaged 33F to 49F.
Structural fill was placed in the following areas: between stations B0 +50 ( + / -) and B8 +00 ( + / -),
approximately 100 feet left of centerline to 100 feet right of centerline; between stations
D1 +00 ( + / -) and D4 +50 ( + / -), approximately 75 feet left of centerline to 75 feet right of
centerline; and between stations F0 +50 ( + / -) and F7 +00 ( + / -), approximately 100 feet left of
centerline to 100 feet right of centerline. Structural fill was placed in 18" to 24" lifts using
various CAT dozers. Each lift was moisture conditioned using a CAT 773 water truck (when
necessary) and compacted using a 10 -ton vibratory smooth drum compactor, passing over the
entire fill surface at least 4 times (method compaction technique is applicable). Ambient and
fill temperatures were monitored and recorded during the placement of the processed ore in
this area.
Structural fill (processed ore) was placed within the Phase IVa VLF between stations G0 +00
( + / -) and G29 +00 ( + / -), approximately 0 to 75 feet right of centerline. Fill material (processed
ore) was excavated from the Phase IVc re- certification area, the old LOB haul road, and the
southeast corner of Phase IVa using a CAT 375 excavator loading the material into 40 -ton
articulating haul trucks. Structural fill was placed using a CAT D -8 dozer in 12" loose lifts and
moisture conditioned as needed using a CAT 773 water truck. Compaction was achieved using
a 10 -ton vibratory smooth drum compactor. Nuclear density testing was performed with results
averaging 95% of maximum dry density. Moisture density relations were obtained in
accordance with ASTM D698 -07. Ambient and fill temperatures were monitored and recorded
during the placement of the processed ore in this area.
Blast pattern drilling was performed between station F1 +00 ( + / -) and F3 +00 ( + / -),
approximately 275 to 300 feet right of centerline and between stations G1 +00 ( + / -) and G6 +00
VLF Weekly Report WE 12.19.09.D.doc