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Ah <br />In most areas, excluding flat areas were fills are started, the subgrade is keyed into as the fill <br />progress. This is due to steep slopes that are adjacent to most fill areas. In this instance, the <br />subgrade is inspected for organics and debris by an AMEC field representative prior to fill <br />placement (keying into the subgrade). <br />D) Structural Fill Placement <br />A CAT 993 front -end loader were used to load structural fill material from a borrow area <br />designated by CC &V. The material was loaded into CAT 40 -ton articulating and CAT 777 haul <br />trucks and hauled to fill areas. The fill excavation was assisted by various CAT dozers. <br />Structural fill was placed in the areas shown on Figure 1. A CAT 330 excavator with a hammer <br />attachment "broke up" oversize boulders before they were placed in the fill. Structural fill was <br />placed in 18" to 24" lifts using various CAT dozers, keying into existing slopes when necessary. <br />Each lift was moisture conditioned using a tandem axle water truck (when necessary) and <br />compacted using a 10 -ton vibratory smooth drum compactor, passing over the entire fill surface at <br />least 4 times (method 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 />No work performed during the week. <br />G) Drain Cover Fill (DCF) <br />Processing of DCF is paused temporarily. Relocation of the processing plant was performed <br />during the week. <br />Location <br />This Week <br />Cumulative <br />Comments <br />(tons) <br />(tons) <br />DCF Process <br />- <br />158,613 <br />DCF processing is temporarily paused <br />Total <br />- <br />158,613 <br />DCF processing is temporarily paused <br />II) Underground Mine Workings <br />A) Discovery <br />During removal of saturated subgrade near UG #4005 timber and narrow gauge rail was <br />encountered. The "bridge" was given a project designation of UG #4050. <br />B) Drilling <br />Confirmatory drilling was performed at Underground Working #4040. A drill pattern was set out by <br />an AMEC field representative. Twenty -seven holes were drilled encountering fouteen voids. An <br />MEW Weekly Report WE 02.18.2012 <br />