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_ o' <br />D) Structural Fill Placement <br />A John Deere 850 excavator was used to excavate structural fill material from a borrow area <br />designated by CC &V. The fill excavation was assisted by various CAT dozers. <br />Structural fill was placed in the areas shown on Figure 1. Structural fill was placed in 18" to 24" <br />lifts using various CAT dozers, keying into existing slopes when necessary. Each lift was moisture <br />conditioned using a tandem axle 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 was applicable). <br />Subgrade temperatures were monitored by an AMEC field representative prior to fill placement. <br />Fill material was not placed until the entire fill area was at or above 32 °F. Fill temperatures were <br />then monitored every hour during ambient temperatures below 32 °F. No frozen material was <br />placed during the week. <br />E) Slope Contouring <br />No work performed during the week. <br />F) Soil Liner Fill (SLF) <br />Relocation of the previously processed soil liner fill stockpile near Dump 4 was finished, moving it <br />outside of the Mill Site footprint using various CAT dozers. <br />G) Drain Cover Fill (DCF) <br />Processing of Drain Cover Fill (DCF) was not performed during the week. <br />Location <br />This Week <br />Cumulative <br />Comments <br />(tons) <br />(tons) <br />DCF Process <br />0 <br />0 <br />Total <br />0 <br />0 <br />II) Underground Mine Workings <br />A) Discovery <br />No work performed during the week. <br />B) Drilling <br />Confirmatory drilling continued at Underground Working #4000. A drill pattern was set out by an <br />AMEC field representative. Sixteen holes were drilled encountering four voids. An approximate <br />total of 800 lineal feet was drilled. As -built survey of the drill holes was performed by Ames. <br />C) Remediation <br />No work performed during the week. <br />D) Structures <br />The existing structures at Underground Ground Working #4005 and Underground Working #4009 <br />were removed using a CAT 330 excavator and loaded into 40 -ton articulating haul trucks. The <br />removed materials were placed in a dump designated by CC &V. <br />MEW Weekly Report WE 12.17.2011 <br />