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amec10 <br />Earth & Environmental <br />D) Slope Contouring <br />1) VLF <br />Slope contouring was performed in the following areas: between stations 1-12 +00 ( + / -) and <br />1-16 +00 ( + / -), approximately 50 to 100 feet left of centerline; between station 1-19 +00 ( + / -) and <br />H13 +00 ( + / -), approximately 100 to 200 feet left of centerline; between stations H2O +00 <br />( + / -) and H26 +00 ( + / -), approximately 100 to 200 feet left of centerline; and between stations <br />J20 +00 ( + / -) and J30 +00 ( + / -), approximately 50 feet left of centerline to 250 feet right of <br />centerline. Slope contouring was performed using various CAT dozers. Material generated as <br />the cut progressed was pushed down the slope. <br />E) Overburden to Stockpile <br />1) VLF <br />Oversize rock within the Phase 5 VLF fill area was removed from fill areas and hauled to the <br />overburden stockpile area east of the east perimeter road near stations A28 +00 ( + / -) to A36 +00 <br />F) Cut to Fill <br />1) VLF <br />A CAT 385 excavator, a CAT 375 excavator, and a John Deere 850 excavator were used to <br />excavate structural fill material from the following areas: between stations H1 +00 ( + / -) and <br />1-14 +00 ( + / -), approximately 0 to 50 feet right of centerline; between stations H24 +00 ( + / -) and <br />H26 +00 ( + / -), approximately 50 to 100 feet left of centerline; between stations J27 +00 ( + / -) <br />and J30 +00 ( + / -), approximately 0 to 50 feet right of centerline; and between stations K0 +00 <br />( + / -) and K4 +00 ( + / -), approximately 150 to 250 feet right of centerline. The structural fill <br />material was loaded into CAT 777 haul trucks and hauled to fill areas. <br />Prior to structural fill placement existing fill areas were ripped and frost was allowed to thaw <br />or was removed. Existing fill temperature were monitored and found to be above 327 before <br />fill placement. An AMEC representative monitored ambient temperatures on an hourly basis <br />during fill placement. Fill temperatures were monitored during ambient temperatures below <br />32 °F and averaged 33 °F to 41 °F. <br />Structural fill was placed between stations B 1 +50 ( + / -) and B10+50 ( + / -), approximately 75 <br />feet left of centerline to 75 feet right of centerline and between stations J20 +00 ( + / -) and <br />J24 +00 ( + / -), approximately 100 to 200 feet left of centerline. Structural fill was placed in 18" <br />to 24" lifts using various CAT dozers. Each lift was moisture conditioned using a CAT 773 <br />water truck (when necessary) and compacted using a 10 -ton vibratory smooth drum compactor, <br />passing over the entire fill surface at least 4 times (method compaction technique is <br />applicable). Ambient and fill temperatures were monitored and recorded during fill placement. <br />Blast pattern drilling was performed between stations J24 +00 ( + / -) and J30 +00 ( + / -), <br />approximately 30 feet left of centerline to 200 feet right of centerline. Blasting was performed <br />on Monday (2/8/2010), Tuesday (2/9/2010), Wednesday (2/10/2010), and Saturday <br />(2/13/2010). No blasting was performed on Thursday (2/11/2010) or Friday (2/12/2010). <br />VLF Weekly Report WE 02.13.10.D.doc <br />