2015-03-07_REPORT - M1980244 - Laserfiche WebLink

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CRIPPLE CREEK & VICTOR GOLD MINING Co. ANGLOGOLD ASHANTI (COLORADO) amec SQUAW GULCH (VLF) WEEKLY REPORT foster wheele- Secondary Underdrain: No work was performed during this reporting period. Tertiary Underdrain: No work was performed during this reporting period. Leak Detection: No work was performed during this reporting period. Miscellaneous: • Fusion welding of 10" HDPE DR11 ADR2 water line pipe and 10" HDPE FM200 pipe • Extended the PSSA High Volume riser pipes approximately 10' • Began the pumping of residual water from the Low Volume Solution Control System riser pipes — approximately 44,750 gallons was pumped during the reporting period • Began the excavation of the water line trench, starting at the ADR2 security pad, proceeding towards the ADR2 pad. Observed the placement and compaction of sele:.t pipe bedding fill material • One skid steer loader and labor crew continued to removed rocks and debris from the 9450 elevation bench in the vicinity of stations A2 +00 through Al2 +00 in preparation for phase 1 sub -grade acceptance • Areas of the exposed LLDPE liner along the edge of the PSSA anchor trench that were damaged during active construction activities, in preparation of subgrade approval, were repaired by the placement of extrusion welded patches and beads, and non - destructively tested and approved prior to subsequent SLF placement in the area. B) Underground Workings: UG #6639: Sandvik 700 completed confirmatory drilling (1,460LF); A Cat 345 excavator & a Cat D7 dozer removed shot rock in preparation for geogrid foundation, Additional drill access was provided. Remediation to be continued. UG #6631: Subgrade acceptance performed for geogrid. Two layers of geogrid placed. Completed the placement of select structural fill over both geogrid layers. Smooth drum vibratory roller compacted the placed select structural fill per project specifications. Remediation to be continued. UG #6010: Completed placement and compaction of select structural fill over first layer of geogrid. Installed second layer of geogrid. Placed and compacted Select Structural Fill over the second layer of geogrid per the project specifications. Remediated. Structural Fill required. UG #6269: First 6" lift of select structural fill was placed and compacted. Completed the placement of the second layer of geogrid. Placed and compacted second lift of Select Structural Fill per project specifications. Remediated. Structural Fill required. UG #6133: A Cat 345 excavator excavated suspected shaft to approximately 20'. A Cat 345 excavator and Cat 330 hammer prepared for concrete plug. Remediation to be continued. UG #6668: A Cat 330 excavated to competent rock at approximately 30'. Remediation to be continued. UG #6547: A Cat 330 excavated to approximately 20' deep — no bottom found. Prepared for drill access. Sandvik 700 track drill completed confirmatory drilling. Will prepare for concrete plug. Remediation to be continued.