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ame%ck-y <br /> Underdrain System: <br /> Primary Underdrain: No work occurred on the primary underdrain. <br /> Secondary Underdrain: Approximately 130 lineal feet of secondary underdrain was constructed per design plans <br /> west of Dump 4. <br /> Tertiary Underdrain: No work occurred on the tertiary underdrain. <br /> Tree Grubbing and Clearing,Chipping: <br /> A Cat 330 excavator removed trees and cleared and grubbed topsoil and deleterious material from near the <br /> Phase 2 Storm Water Diversion Ditch at approximate stations 3+00 to 6+00. <br /> B) Underground Workings <br /> • Confirmatory Drilling <br /> Confirmatory drilling occurred at underground working#6446(part of the Anaconda complex). Further <br /> remediation efforts are required. <br /> • Remediation <br /> Approximately 200 yds3 of 4,000 PSI concrete was placed in underground working#U6273. Concrete physical <br /> property testing occurred and concrete cylinders were cast for laboratory determination of compressive strength. <br /> Additional remediation is required. <br /> Underground workings#6112,#6285,#6310,#6311,#6390,and#6561 were excavated to competent rock, <br /> backfilled with structural fill per project specification, and are considered remediated. <br /> A Cat 330 excavator began excavating working#6557. Additional remediation is required. <br /> Timbers were found at underground working#6560 at a depth of about 5 to 7 feet. Work stopped due to equipment <br /> breakdown. Additional remediation is required. <br /> AMES survey located 12 additional unknown surface workings located near the Phase 2 Diversion Ditch and <br /> Perimeter Road. <br /> 11)Storm Water Management <br /> Best Management Practices(BMPs)are being performed. <br /> Page 3 of 7 MLE2 WE 3 May 2014.doc <br />