2009-12-21_REVISION - M1980244 (35)

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amec Earth & Environmental CAT 773 water tuck (when necessary) and compacted using a 10 -ton vibratory smooth drum compactor. The entire surface of the subgrade was compacted with at least 4- passes. This area was inspected by an AMEC representative and accepted for structural fill placement. E) Slope Contouring 1) VLF Slope contouring was performed between stations J7 +00 ( + / -) and J16 +00 ( + / -), approximately 450 feet left of centerline to 50 feet right of centerline and between stations A51 +00 ( + / -) and A56 +00 ( + / -) 0 to 100 feet left of centerline. Contouring was performed using various CAT dozers and CAT excavators. Material generated as the cut progressed was pushed down the slope. F) 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 between stations A28 +00 ( + / -) to A36 +00 ( + / -). G) Cut to Fill 1) VLF A John Deere 850 excavator and a CAT 385 excavator excavated structural fill material from the following areas: between stations 1-10 +00 ( + / -) and 1-14 +00 ( + / -), approximately 0 to 80 feet left of centerline; between stations A55 +00 ( + / -) and A59 +00 ( + / -), approximately 50 feet left of centerline to 50 right of centerline; between stations A0 +00 ( + / -) and A3 +00 ( + / -), approximately 0 to 50 feet left of centerline; and between stations A8 +00 ( + / -) and A10 +00 ( + / -), approximately 200 to 250 feet left of centerline. The structural fill material was loaded into CAT 777 haul trucks. Structural fill material was placed between stations A55 +00 ( + / -) and A59 +00 ( + / -), approximately 50 to 150 feet left of centerline and between stations J2 +00 ( + / -) and J17 +00 ( + / -), approximately 450 feet left of centerline to 50 feet right of centerline. The structural fill material was spread using various CAT dozers in 18" to 24" lifts. 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). Structural fill (processed ore) was placed within the Phase IV VLF, between stations G0 +00 ( + / -) and G30 +00 approximately 100 to 150 feet left of centerline. Existing processed ore was placed using a CAT D -6 LGP dozer in 12" loose lifts and moisture conditioned using a CAT 773 water truck. Compaction was achieved using a 10 -ton vibratory smooth drum compactor. Structural fill placement was observed by an AMEC representative constantly. Nuclear density testing was performed with results averaging 95% of maximum dry density. Moisture density relations were performed in accordance with ASTM D- 698 -07. Today's placement will achieve more than five feet of cover over the Phase IV geomembrane, allowing haulage using the 40 -ton articulating haul trucks VLF Weekly Report WE 10.17.09.D.doc