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U <br />amec <br />Ames finished backfilling UG #6320. The shaft was filled to within 50 feet of the surface using the 60 -inch minus <br />material. The remainder of the shaft was completed with the on -site tailings which classifies as coarse shaft backfill <br />The total amount of material placed in the shaft was approximately 6,355 cubic yards. <br />A Cat 345 excavator removed shot rock from the adit at UG #6003. Two additional adits were located and will <br />require confirmatory drilling to isolate them. <br />Underground Workings U6332, 6342, 6417, 6405, 6416, 6410, and 6301 were excavated to competent rock, <br />backfilled with structural fill, and are considered remediated. <br />Structural fill was placed over the cemented rock fill in Underground Working number U6280. The working is <br />considered remediated. <br />Cemented rock fill was placed in Underground Working number 6036 and then backfilled with structural fill. The <br />working is considered remediated. <br />Working UG #6283 was blasted, excavated, backfilled with structural fill, and is considered remediated. <br />Drain Cover Stockpile Extension, Outside the Phase 2 Work Area: <br />Seven underground workings were located within the planned stockpile extension yesterday. Four of the workings were <br />previously removed in July 2013. <br />The following workings were located and were backfilled during the site grading and tree removal: <br />UG #6424: (5453), Known Shaft: Remediated, backfilled. <br />UG #U6425: Unknown Trench: Runs from the east to west about 80 -feet in length. Remediated, backfilled. <br />UG #U6426: Unknown Shallow Surface Working. Remediated, backfilled. <br />C) Historical Crib Wall 1 South MSE Wall: <br />A Cat 320 excavator was used to remove tailings from behind the timbers at the historic crib wall. The tailings were <br />pushed down hill near station B16 +00 where they were loaded out and used as fill. A Cat 320 excavator was also <br />used to remove timber panels form the historic crib wall that were fastened together with steel backing straps and <br />spikes. <br />Timber -panel installation continued at the South MSE wall. <br />11) Storm Water Management <br />Best Management Practices (BMP) is being performed. Erosion control efforts took place during this reporting <br />period following any precipitation (snow removal and runoff from melting snow and ice). <br />CQA ACTIVITIES: <br />1) Field Activities: Observation of construction activities during this reporting period included: Slope grading and fill <br />placement; Underground working remediation and drilling; Production drilling and blasting; Timber panel and tailing <br />removal at the historic Crib Wall, Timber panel installation at the South MSE Wall; and Clay (Soil Liner Fill —SLF) and <br />Drain Cover Fill (DCF) processing. <br />11) Laboratory Activities: Laboratory testing continued with Permeability, Particle Size Distribution, Atterberg Limits, <br />Moisture - Density, gradations and material classification and identifications and field material sampling were performed <br />during this reporting period. <br />DCF: Sample 50 was collected and returned to Amec's laboratory for analysis. <br />SLF Sample Number 91 -S through 93 -S were collected and returned to Amec's laboratory for analysis. <br />Page 3 of 7 MLE2 WE 25Jan 14. doc <br />