2013-08-23_REPORT - M1980244 (3)

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Structural Fill: Structural fill continued to be hauled to the PSSA toe berm area widening the haul road, using several Cat 777 and several 740 haul trucks. The structural fill material was placed in an approximately 18 to 24 inch loose lifts by a John Deere 1050J and D1 OR dozers followed by a Cat CS56B vibratory, 10 -ton, smooth-drum roller that compacted the placed materials with a minimum of four passes (By method specification). In addition to the structural fill placement for the PSSA toe berm embankment, the contractor continued cut to fill operations and compaction by method specification located at the mid -way ADR haul road location at approximate Sta.50 +00 — 53 +00. A Cat D8 Dozer with GPS and a Cat C556 Smooth Drum roller was utilized. Progress is expected to continue. See Hwy 67 below for detail of embankment fill progress. Note: An Amec field representative monitored structural fill material temperatures placed within the areas of fill during all shifts. Average structural fill temperatures were above 32 °F Clay (SLF) Processing: Cameron Site: No clay mining or processing occurred during this reporting period due to a saturated site from previous rains. Squaw Gulch Site: No work occurred at the VLF clay borrow site during this reporting period. Underdrain System: Secondary Underdrain: No work was performed on the Secondary underdrain during this reporting period. A total of 1380 feet of Secondary underdrain has been completed. Primary Underdrain: No work was performed on the Primary underdrain during this reporting period. A total of 1280 feet of Primary underdrain has been completed. Temporary Underdrain: Temporary underdrain pipe is installed thru the embankment. No other work occurred during this reporting period. Tree /Slash Clearing, Chipping: Seed Masters paused operations until further notice. B) Underground Workings Confirmatory drilling was performed on underground working No. 6132, No. 6187, No. 6239 during this reporting period. All drill hole locations were established on a 4 -foot center isolating any voids found. Further remediation efforts will be ongoing until remediated. Summary of the remediation efforts will follow 100% remediation. During this reporting period exploratory excavation was performed on UG working No. 6202 and No. 6203. Site's listed require further investigation and excavation into bedrock as remediation continues to be completed. During this reporting period remediation efforts were performed and completed on UG working No.6122, No. 6194, No. 6195, No. 6203 and No. U6263. Sites listed were excavated to practical refusal into rock varying depths depending on the working remediated. The site for each working was then backfilled in 2 foot loose lifts to approximate planned subgrade elevation using the onske structural fill (excavated material) and "bucket tamped" with the back of the CAT 330 excavator bucket. All backfill material was free of organic material, ice and snow and are considered remediated as specified. Page 2 of 6 MLE2 WE 08.10.13.doc