2014-01-30_REPORT - M1973021 - Laserfiche WebLink

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4.2 Central Quarry Observations in the Central Quarry on January 21 and January 22, 2014 indicate: • No major failures occurred last year; • Minor, localized sloughing and raveling occurred; • Nearly all rockfall was contained on the benches. Several puncture marks were present on the ice of the reservoir in the quarry, indicating some rockfall into the pond. • The stabilized slope in the northeast section of the Central Quarry did not exhibit any instability or large erosional features • A small groundwater seepage area is visible on the west (east facing) side of the Central Quarry. This seepage is a new condition and should be monitored on a weekly basis. If the condition of the area worsens, engineering consultation is recommended. 4.3 South Quarry • No major failures occurred last year; • Minor, localized sloughing and raveling occurred; • Tension cracks present on bench 7160 warrant extra caution when working in this area. If the condition of the area worsens or continues, engineering consultation is recommended. • Slope movement noted on the natural surface adjacent to the 7335 -7270 haul road warrants extra caution when working near or below this area. If the condition of the area worsens or continues, engineering consultation is recommended. • Slope instability was noted above Runaway Truck Ramp 6875 warrants extra caution when working near or below this area. If the condition of the area worsens or continues, engineering consultation is recommended. Observations of mining activity in the South Quarry in 2013 appeared to follow the Permit and the Mine Plan. Mining did not increase the mine depth beyond 6640 or increase the overall footprint of the South Quarry. Rock types observed included granite and biotite or granitic gneiss with localized pegmatitic or mafic intrusions. The majority of the rock observed in the highwalls appeared fresh to moderately weathered, with the major exceptions located in highwalls proximal to the native topography or in the fault zone and associated sillimanitic gneiss, observed in the northern portion of the Central Quarry and within the Bench 6640 highwall (6640 Scanline B, approximate stations 0 +00 — 1 +10). Highwall trends, typically north -south or east -west, along with observed typical joint and foliation orientations indicate favorable conditions to continue mining following the current mine plan. GEI Consultants, Inc. 25 January 2014 2013 Morrison Quarry Annual Report