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

amec'-9
Earth K Environmuntai
( + / -) and J30 +00 ( + / -), approximately 100 feet left of centerline 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.
E) 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
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 E2 +00 ( + / -) and E4 +50 ( + / -),
approximately 50 feet left of centerline to 50 feet right of centerline; between stations H24 +00
( + / -) and H30 +00 ( + / -), approximately 75 to 100 feet left of centerline; between stations
J27 +00 ( + / -) and J29 +50 ( + / -), approximately 20 feet left of centerline to 250 feet right of
centerline; and between stations K0 +00 ( + / -) and K4 +00 ( + / -), approximately 150 to 250 feet
right 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
327 and averaged 33 °F to 45T.
Structural fill was placed in the following areas: between stations B0 +00 ( + / -) and B8 +00 ( + / -),
approximately 75 feet left of centerline to 75 feet right of centerline; between stations J9 +00
( + / -) and J12 +00 ( + / -), approximately 50 feet left of centerline to 50 feet right of centerline;
and between stations J18 +00 ( + / -) and J20 +00 ( + / -), approximately 20 to 50 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 J25 +00 ( + / -) and J30 +00 ( + / -),
approximately 50 feet left of centerline to 100 feet right of centerline. Blasting was performed
on Monday (2/1/2010), Tuesday (2/2/2010), Wednesday (2/3/2010), Thursday (2/4/2010), and
Friday (2/5/2010).
G) Material Processing
1) South Cresson Clay Processing Area
Processing of Soil Liner Fill material continued at the South Cresson Clay Process. A CAT D -8
dozer, a CAT 320 excavator, and a CAT 966 front -end loader were used to process the material.
Soil liner fill processing at the South Cresson Clay borrow is complete.
VLF Weekly Report WE 02.06.10.D.doc