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4.0 Results and Discussion <br />Based on observations made during the January 2014 field investigation of the Morrison <br />Quarry, staff familiarity with the site, and review of previous geotechnical addenda, the <br />North Quarry has experienced little change in finished slope characteristics during 2013. <br />Only small scale, localized rockfall and highwall raveling occurred during the last year and <br />can be considered minor. The condition of the main truck of the North Quarry is expected to <br />remain the stable during the course of the 2014 mining year with continued small scale <br />rockfall and highwall raveling expected to occur. <br />In 2014, local ridge removal caused minor a disturbance near the quarry office safe zone. The <br />disturbance resulted in a graded slope with an assumed stable configuration of approximately <br />4:1 (H:V). Resultant bench reclamation in the same area exhibits localized instability in the <br />form of tension cracks on the top surface. The tension cracks range between approximately 1 <br />to 3 inches wide. This reclaimed area should be monitored for increased instability and/or <br />stabilized. <br />Based on observations made during the January 2014 field investigation of the Morrison <br />Quarry, staff familiarity with the site, and review of previous geotechnical addenda, the <br />Central Quarry has experienced little change in finished slope characteristics during 2013. <br />Only small scale, localized rockfall and highwall raveling occurred during the last year and <br />can be considered minor. The condition of the Central Quarry is expected to remain the <br />stable during the course of the 2014 mining year with continued small scale rockfall and <br />highwall raveling expected to occur. Reclamation was ongoing in 2013 and is expected to <br />continue in 2014, bringing the floor or the quarry to an elevation of approximately 6500 feet. <br />A small runaway ramp was created adjacent to the haul road in the southeast area of the <br />South Quarry. The resultant impact was minor in 2013, with no impact to the quarry <br />expected in 2014. Seepage emanating the west (east facing) highwall at approximate <br />elevation 6600 is considered minor ( <2 — 3 gpm) and appears to not have impacted highwall <br />stability. This seepage activity has not been noted in past geotechnical addenda and is <br />considered to be a new feature. This seepage represents a changed condition and the seepage <br />area should be monitored in 2014 for increase flow rates, spreading, instability, etc, however <br />is not anticipated to impact highwall stability in 2014. <br />Amendment 3 to AI's Morrison Quarry Mining Permit M- 1973 -021 establishes requirements <br />for rock stability at the Morrison Quarry. Granite and biotitic gneiss should be considered <br />"competent" rock and shear zones or highly weathered rock should be considered "poor" <br />rock if the zones have the ability to decrease the overall stability of quarry highwalls and/or <br />benches. The observed conditions in the newly -mined areas of the South Quarry are of <br />predominantly "competent" rock quality. Localized "poor" zones were observed during the <br />January 2014 inspection. These "poor" areas are typically the result of the highwalls <br />GEI Consultants, Inc. 23 January 2014 <br />2013 Morrison Quarry Annual Report <br />