2011-08-26_REPORT - M1980244 ‎(30)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 8/26/2011
• Doc Name: Final Report QA 2011 Phase 5 VLF Ore Storage Aug 26, 2011 vol 2 of 3 DOCUMENT 2 OF 3
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

ameO
> Environmental
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 A 18 +00 ( + / -) and A24 +00 ( + / -),
approximately 50 to 150 feet left of centerline; between stations H0 +00 ( + / -) and H9 +50 ( + / -),
approximately 50 feet left of centerline to 100 feet right of centerline; between stations; J14 +00
( + / -) and J16 +00 ( + / -), approximately 20 to 60 feet right of centerline; and between stations
K11 +00 ( + / -) and K13 +00 ( + / -), approximately 120 to 200 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 ranged between 33 °F to 39 °F.
Structural fill was placed in the following areas: between stations A54 +00 ( + / -) and A59 +00
( + / -), approximately 70 feet left of centerline to 20 feet right of centerline; between stations
B8 +00 ( + / -) and B10 +00 ( + / -), approximately 50 feet left of centerline to 50 feet right of
centerline; between stations C1 +75 ( + / -) and C6 +00 ( + / -), approximately 20 to 80 feet left of
centerline; between stations 50 feet left of centerline to 70 feet right of centerline; and between
stations J3 +00 ( + / -) and J16 +00 ( + / -), approximately 0 to 150 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 fill placement.
Blast pattern drilling was performed between stations 111 +50 ( + / -) and H9 +00 ( + / -),
approximately 90 feet left of centerline to 75 feet right of centerline. Blasting was performed
on Monday (3/22/2010), Tuesday (3/23/2010), Wednesday (3/24/2010), Thursday (3/25/2010),
and Friday (3/26/2010). No blasting was performed Saturday (3/27/2010).
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 03.27.10.D.doc