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

ameO-
Environmental
50 to 250 feet right of centerline. Slope contouring was performed using various CAT dozers.
Material generated as the cut progressed was pushed down the slope.
D) Overburden to Stockpile
1) VLF
Oversize rock within the Phase 5 VLF fill area was removed from fill areas and hauled to the
overburden stockpile area east of the east perimeter road near stations A28 +00 ( + / -) to A36 +00
E) Cut to Fill
1) VLF
A CAT 385 excavator, a CAT 375 excavator, and a John Deere 850 excavator were used to
excavate structural fill material from the following areas: between stations A7 +50 ( + / -) and
A23 +00 ( + / -), approximately 200 to 300 feet right of centerline; between stations 1-12 +00 ( + / -)
and H18 +00 ( + / -), approximately 125 feet left of centerline to 100 feet right of centerline;
between stations H26 +00 ( + / -) and H31 +00 ( + / -), approximately 75 to 150 feet left of
centerline; and between stations J12 +00 ( + / -) and J22 +00 ( + / -), approximately 100 to 300 feet
left of centerline. The structural fill material was loaded into CAT 777 haul trucks and hauled
to fill areas.
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 33 °F to 40 °F.
Structural fill was placed in the following areas: between stations A11 +00 ( + / -) and A23 +00
( + / -), approximately 200 to 300 feet left of centerline: between stations A52 +00 ( + / -) and
A57 +00 ( + / -) , approximately 0 to 175 feet left of centerline; between stations 1-18 +00 ( + / -) and
H14 +00 ( + / -), approximately 50 to 100 feet right of centerline; H26 +00 ( + / -) and H30 +50
( + / -), approximately 25 feet left of centerline to 75 feet right of centerline; J3 +00 ( + / -) and
J10 +00 ( + / -), approximately 0 to 200 feet right of centerline; and between stations J12 +00 ( + / -)
and J22 +00 ( + / -), approximately 200 to 300 feet left 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 fill placement.
Blast pattern drilling was performed between stations 1-12 +00 ( + / -) and 1-16 +00 ( + / -),
approximately 50 to 100 feet right of centerline. Blasting was performed on Tuesday
(3/2/2010) and Saturday (3/5/2010). No blasting was performed Monday (3/1/2010),
Wednesday (3/3/2010), Thursday (3/4/2010), and Saturday (3/6/2010).
VLF Weekly Report WE 03.06.10.D.doc