2009-12-11_REPORT - M1980244 (4)

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amE�c Earth 8 Environmental E) Overburden to Stockpile 1) VLF No work performed during the week. F) Cult to Fill 1) VLF Snow from the weekend snowfall was removed from all fill areas prior to any placement. Prior to structural fill placement, existing fill temperature were monitored and to be or above 33 °F. Ambient were monitored on an hourly basis, by an AMEC representative during fill placement. Fill temperatures averaged approximately 33 °F during the period of time the ambient temperature was below 32 °F. Structural fill (processed ore) was placed within the Phase IV VLF, between stations G12 +00 ( + / -) and G29 +00 ( + / -), approximately 75 to 150 feet left of centerline. Fill material (processed ore) was excavated from the SE corner of Phase IV area using a CAT 375 excavator loading the material into 40 -ton articulating haul trucks. Structural fill was placed using a CAT D -8 dozer and a CAT D -6 LGP (low ground pressure) dozer in 12" loose lifts and moisture conditioned as needed using a CAT 773 water truck. Compaction was achieved using a 10 -ton vibratory smooth drum compactor. Nuclear density testing was performed with results averaging 95% of maximum dry density. Moisture density relations were obtained in accordance with ASTM D698 -07. Structural fill was placed in the following areas: Downstream toe, between stations D0 +50 ( + / -) and D4 +00 ( + / -), approximately 0 to 50 feet right and left of centerline. Fill material was excavated between stations E15 +00 ( + / -) and E17 +50 ( + / -), approximately 0 to 50 feet right of centerline using one CAT 385 excavator loading the material into CAT 777 haul trucks. Structural fill was placed between stations 132 +00 ( + / -) and 134 +00 ( + / -) and between stations F 1 +50 ( + / -) and 3 +50 ( + / -), left and right of both centerlines 0 to 100 -feet. Spreading and keying the fill in loose lifts using a CAT D -8 dozer and a CAT D -9 Dozer. A CAT 385 excavator and a John Deere 850 excavator was used to excavate structural fill material between stations E15 +00 ( + / -) and E16 +50 ( + / -), approximately 0 to 50 feet right of centerline and between stations G8 +00 ( + / -) and G10 +00 ( + / -), 200( + / -) feet left of centerline. Additional cut was excavated from the NW quadrant of "Substation Hill" (previously "shot" area). The structural fill material was loaded into CAT 777 haul trucks. Compaction was achieved using a CAT 10 -ton vibratory smooth drum compactor passing over the entire fill surface a minimum of 4- passes (method compaction technique is applicable). Blast pattern drilling was performed in the following areas: Between stations H5 +00 ( + / -) and H7 +00 ( + / -), approximately 20 to 50 feet right of centerline: N. W. quadrant and S. W. quadrant of "Substation Hill" using three track mounted drill rigs. Blasting was performed in these areas Tuesday (11/17/2009), Wednesday (11/18/2009), and Thursday (11/19/2009). VLF Weekly Report WE 11.21.09.D.doc