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

ameOEarth &
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 and a John Deere 850 excavator were used to excavate structural fill
material from the following areas: between stations A18 +00 ( + / -) and A24 +50 ( + / -),
approximately 20 to 150 feet left of centerline; between stations H4 +00 ( + / -) and Hl 1 +00
( + / -), approximately 50 feet left of centerline to 100 feet right of centerline; between stations;
H22 +00 ( + / -) and H26 +50 ( + / -), approximately 20 to 75 feet left of centerline; and between
stations J21 +00 ( + / -) and J24 +00 ( + / -), approximately 50 feet left of centerline to 50 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
32 °F and averaged 33 °F to 39T.
Structural fill was placed in the following areas: between stations A21 +00 ( + / -) and A24 +50
( + / -), approximately 20 to 150 feet left of centerline; between stations A54 +00 ( + / -) and
A59 +00 ( + / -), approximately 70 feet left of centerline to 20 feet right of centerline; between
stations H5 +00 ( + / -) and H7 +00 ( + / -), approximately 25 feet left of centerline to 25 right of
centerline; and between stations J3 +00 ( + / -) and J10 +00 ( + / -), approximately 0 to 150 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 H3 +00 ( + / -) and H9 +50 ( + / -),
approximately 20 to 100 feet right of centerline. Blasting was performed on Monday
(3/15/2010), Tuesday (3/16/2010), Wednesday (3/17/2010), and Thursday (3/18/2010). No
blasting was performed Friday (3/19/2010) and Saturday (3/20/2010).
F) Material Processing
1) East Cresson Clay Borrow Area
Processing of Soil Liner Fill material continued this week. A CAT D -8 dozer, a CAT 320
excavator, a CAT 966 front -end loader, and tandem -axel haul trucks were used to excavate, haul,
and process the material. The processing plant went down Tuesday (3/16/2010) due to mechanical
problems.
VLF Weekly Report WE 03.20.10.D.doc