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e <br /> 20' 20' 20' 20' 20' <br /> �xistinq_Grade <br /> \ _El. = 80' <br /> Daily Inspections of the wall are necessary and any <br /> cause for concern should be brought to the attention Remove Overburden <br /> of the Engineer. ♦\ �\ and material in this area <br /> Phase 1 ` <br /> ` Bench <br /> Starting near the Highwall make a bench no deeper than 40'. -- <br /> Excerise extreme care when equipment is operating El __. 4()' <br /> within 20'of the Highwall <br /> Once bench is 20'wide and stable,keep widening the bench <br /> by pushing the material down to the previously excavated Mining lines <br /> bottom at shale layer level 100' <br /> Continue moving away from the Highwall in approximate 20' <br /> working swaths. <br /> Top of Shale L_eyer <br /> El. = 100' <br /> Highwall @ Helmericks <br /> Phase 1 <br />