2011-11-19_REPORT - M1980244 (3)

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amec Earth & Environmental between stations J27 +00 ( + / -) and J29 +00 ( + / -), approximately 20 to 100 feet right of centerline. Slope contouring was performed using various CAT dozers. Material generated as the cut progressed was pushed down the slope. E) 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 F) Cut to Fill 1) VLF A CAT 385 excavator and a John Deere 850 excavator were used to excavate structural fill material from between stations H11 +00 ( + / -) and H13 +00 ( + / -), approximately 0 to 50 feet right of centerline and between stations J25 +00 ( + / -) and J28 +00 ( + / -), approximately 50 feet left of centerline to 50 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 averaged 32 °F to 40T. Structural fill was placed in the following areas: between stations A8 +00 ( + / -) and A 13 +00 ( + / -), approximately 20 feet left of centerline to 20 feet right of centerline; between stations C0 +00 ( + / -) and C5 +00 ( + / -), approximately 50 feet left of centerline to 50 feet right of centerline; and between stations J18 +00 ( + / -) and J24 +00 ( + / -), approximately 50 to 100 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 J25 +00 ( + / -) and J30 +00 ( + / -), approximately 0 to 100 feet right of centerline. Blasting was performed on Tuesday (1/26/2010), Wednesday (1/27/2010), Thursday (1/28/2010), and Friday (1/29/2010). G) Material Processing 1) South Cresson Clay Processing Area Processing of Soil Liner Fill material continued at the South Cresson Clay Process. A CAT D -8 dozer, a CAT 320 excavator, and a CAT 966 front -end loader were used to process the material. Location Week tons emulative Comments So Cresson Clay Processing 11,999 199,578 Squaw Gulch Processing 0 35,816 Processing in area complete. Total 11,999 223,395 VLF Weekly Report WE 01.30.10.D.doc