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ameO <br />D) Structural Fill Placement <br />A CAT 993 front -end loader and a CAT 992 front -end loader were used to load overburden fill <br />material from a borrow area designated by CC &V. The material was loaded into CAT 40 -ton <br />articulating and CAT 777 haul trucks and hauled to fill areas. The fill excavation was assisted by <br />various CAT dozers. <br />Overburden fill was placed in the areas shown on Figure 1. A CAT 330 excavator and a CAT 312 <br />excavator with a hammer attachments "broke up" oversize boulders before they were placed in <br />the fill. Overburden fill was placed in 18" to 24" lifts using various CAT dozers, keying into existing <br />slopes when necessary. Each lift was moisture conditioned using a CAT 773 water truck (when <br />necessary) and compacted using a 10 -ton vibratory smooth drum compactor, passing over the <br />entire fill surface at 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 />Slope contouring was performed using a John Deere 850 excavator. Material generated during <br />slope contouring was placed as overburden fill at the top of the slope. <br />F) Soil Liner Fill (SLF) <br />No work performed during the week. <br />G) Drain Cover Fill (DCF) <br />No work performed 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 />H) Underdrain <br />No work was performed during the week. <br />II) Underground Mine Workings <br />A) Discovery <br />B) During topsoil relocation an Underground Working was encountered. The location was surveyed <br />by Ames and given a project designation of UG #4068. <br />C) Drilling <br />Confirmatory drilling was performed at Underground Working #4007. A drill pattern was set out by <br />an AMEC field representative. Sixty -five holes were drilled encountering seventeen voids. An <br />approximate total of 3,250 lineal feet was drilled. As -built survey of the drill holes was performed <br />by Ames. <br />Grouting of missed (non -void) confirmatory drill holes was performed at Underground Workings <br />#4052 and #4053. A grout pump and laborers were used to place bentonite grout into the "miss" <br />drill holes. <br />MEW Weekly Report WE 03.03.2012 <br />