2009-12-21_REVISION - M1980244 (40)

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Octobe 2004 -S- 043 -2170 • Water Trucks (2); is • Caterpillar 14G Motor - Grader; • Caterpillar CS563 Smooth Drum Vibratory Roller (SDVR) Compactors (2); • Caterpillar 120 Trackhoe; • Caterpillar 314 Trackhoe; • Caterpillar 375 Trackhoe; • Caterpillar 740 Haul Trucks (6); and • Caterpillar D400E Haul Trucks (2). Weather data from the period of September 2001 through August 2002 are presented in the 2002 Phase IVa Certification Report, weather data from the period of September 2002 through June 2003 are presented in the June 2003 Phase IVb PSSA Certification Report, and weather data from the period of June 2003 through October 2003 are presented in the October 2003 Phase IV b OSA Certification Report. Table 2 presents a summary of the weather during the period of April 2004 through October 2004 for the Phase 1Vc OSA construction activities. 0 2.1 Underground Workings Remediation Historic underground workings within the footprint of the Phase 1Ve OSA were remediated following the recommended remediation plans presented in Drawing No. 12 of the IFC Drawings or by the Certifying Engineer, with DMG approval. A summary of the underground workings remediation is presented in Table 3. This table shows the working identification, location (northing and easting), type of working, remediation quantities, and comments. The following provides a summary of the general remediation methods for the underground workings within the Phase We OSA footprint. 2.1.1 Remediation of Shafts, Stopes, and Shallow Surface Pits The following is the general approach used to remediate isolated shafts and shallow surface pits: • For open workings where the depth to competent bedrock is less than 7 feet to the • final SLF subgrade surface, the excavations were backfilled with CSB to MU17 004MCC" -()4eervt- 1004w4n»0.0400.124sac.Mrtrv�a« Golder Associates