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amec <br />Earth & Environmental <br />E) Overburden to Stockpile <br />1) VLF <br />No work performed during the week. <br />F) Cut to Fill <br />1) VLF <br />A CAT 385 excavator and a John Deere 850 excavator were used to excavate structural fill <br />material in the following areas: between stations E16 +00 ( + / -) and E18 +00 ( + / -), <br />approximately 0 to 75 feet right of centerline; between stations F2 +00 ( + / -) and F6 +00 ( + / -), <br />approximately 0 to 400 feet right of centerline; between stations H6 +00 ( + / -) and H11 +00 <br />( + / -), approximately 0 to 75 feet left of centerline; between stations J26 +00 ( + / -) and J29 +00 <br />( + / -), approximately 100 to 150 feet right of centerline; between stations K0 +00 ( + / -) and <br />K4 +00 ( + / -), approximately 150 to 200 feet right of centerline; and between stations K8 +00 <br />( + / -) and K10 +00 ( + / -), approximately 100 to 150 feet right of centerline. The structural fill <br />material was loaded into CAT 777 haul trucks. <br />Prior to structural fill placement, existing fill temperatures were monitored and found to be at <br />or above 41'F. Ambient temperatures were monitored on an hourly basis, by an AMEC <br />representative during fill placement. No fill material was placed during ambient temperatures <br />less than 32 °F. <br />Structural fill was placed in the following areas: between stations A27 +00 ( + / -) and A37 +00 <br />( + / -), approximately 0 to 250 feet left of centerline; between stations B4 +00 ( + / -) and B7 +00 <br />( + / -), approximately 0 to 150 feet right of centerline; between stations D0 +00 ( + / -) and D3 +00 <br />( + / -), approximately 50 feet left of centerline to 50 feet right of centerline; between stations <br />F2 +00 ( + / -) and F6 +00 ( + / -), approximately 0 to 150 feet left of centerline; and between <br />stations J23 +00 ( + / -) and J25 +00 ( + / -), approximately 0 to 75 feet left of centerline. Structural <br />fill was placed in 18" to 24" lifts using various CAT dozers. Each lift was moisture <br />conditioned using a CAT 773 water truck (when necessary) and compacted using a 10 -ton <br />vibratory smooth drum compactor, passing over the entire fill surface at least 4 times (method <br />compaction technique is applicable). <br />Structural fill (processed ore) was placed within the Phase IVa VLF between stations G3 +00 <br />( + / -) and G11 +00 ( + / -), approximately 25 to 50 feet left of centerline and between stations <br />G15 +00 ( + / -) and G30 +00 ( + / -), approximately 50 to 100 left of centerline. Fill material <br />(processed ore) was excavated from the Phase IVc re- certification area, the old LOB haul road, <br />and the southeast corner of Phase IVa using a John Deere 850 excavator loading the material <br />into 40 -ton articulating haul trucks. Structural fill was placed using a CAT D -8 dozer in 12" <br />loose lifts and moisture conditioned as needed using a CAT 773 water truck. Compaction was <br />achieved using a 10 -ton vibratory smooth drum compactor. Nuclear density testing was <br />performed with results averaging 95% of maximum dry density. Moisture density relations <br />were obtained in accordance with ASTM D698 -07. Ambient and fill temperatures were <br />monitored and recorded during the placement of the processed ore in this area. All material <br />met minimum specifications throughout the placement process. <br />VLF Weekly Report WE 11.14.09.D.doc <br />