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Review of Stability Exhibit <br />Page 12 <br />May 15, 2014 <br />the highwall. The proposed final quarry topographic map does not show any drainage <br />control swales for the area upslope of the highwall. <br />• Please verify that the slope will remain dry and that the seasonally high <br />groundwater level is below the pit floor. <br />• Please provide comment on how surface water control will be established <br />around the highwall. <br />• Please comment on how overall long -term highwall performance and stability <br />will be determined and monitored. <br />It should be noted that rockfall was not addressed as part of this stability analysis. <br />