2014-01-17_REPORT - M1980244 (3)

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Cripple Creek & Victor Gold Mining Company Phase 5 Slide Repair Final Report ameO Quality Assurance Monitoring &Test Results January 14, 2014 2.0 SUMMARY OF EARTHWORK CONSTRUCTION Earthworks activities associated with the Phase 5 Slide Repair included the following: • SLF preparation /minor repairs • Placement and compaction of backfill in anchor trench • DCF placement above the primary geomembrane layer Ames generally used the following equipment during construction: • John Deere 35D Mini - excavator • Komatsu Excavator • Bobcat T750 Skid -steer Loader • Caterpillar D8R Dozer • Caterpillar D6R Dozer • Caterpillar D6 LGP Dozer • Caterpillar 740 Haul Trucks Weather data for the Phase 5 Slide Repair construction activities from the period of September 2013 through November 2013 are presented in Table 2. 2.1 Soil Liner Fill Preparation Ames re- contoured the entire surface of the Phase 5 Slide repair footprint. The surface was smooth, firm, and unyielding; and free of vegetation, construction debris, sticks, sharp rocks, void spaces, ice, abrupt elevation changes, standing water, and cracks larger than one - quarter inch in width. The quality of the finished surface was then maintained until the geomembrane was placed. AMEC and ECA provided formal subgrade (SLF) approval prior to geomembrane deployment. The acceptance forms are presented in Appendix G. 2.2 Drain Cover Fill Ames began placing DCF at the Phase 5 Slide Repair in October 2013 and completed placement in November 2013. Ames placed approximately 5,359 cubic yards of DCF per project specifications. The DCF was placed in a minimum of 2- foot -thick lifts over the geomembrane. Ames placed DCF in an uphill direction on any slopes steeper than 4H:1 V. sAprojects \1568 cc &v -ph v slide repair cqa \11.0 certification report\cc &v roc report. docx 5