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<br />March 3. 1997 -3- 963-2178400.410 <br />3.0 POTENTIAL RISK iVIITIGATION DURING CONSTRUCTION <br />CDMG recommended that MCC have a geotechnical design engineer present on site during <br />construction of the access roads and facilities. Golder agrees with this recommends[ion. <br />Although our designs incorporate engineered embankments and french drains to maximize <br />stability, an on-site engineer will be available to monitor and evaluate construction <br />activities; especially in the areas where final designs will be field fit depending upon the <br />soil and rock conditions. <br />r <br />3.1 Methods of Monitoring <br />During construction the Engineer will make visual observations of all cuts, landslides, and <br />slopes. If movements in the slopes seem apparent, measurements will be made to quantify <br />the rate, direction, and magnitude of the movements. Some monitoring recommendations <br />may include but are not limited to: <br />Surface extensiometers, <br />Optical Surveys, <br />Inclinometers, <br />Piezometers. <br />Should slope movement become excessive, a number of methods can be employed to <br />effectively decrease the movement and stabilize the slope to an acceptable factor of safety. <br />These means include but are not limited to: <br />1. Movement of Earth <br />a) Slope flattening <br />b) Terracing <br />c) Removal of soil at the head <br />2. Increase drainage <br />a) Surface Ditches <br />b) French Drains <br />c) Horizontal Drains <br />3. Retaining Structures <br />a) Rock Fill Buttress at Toe <br />b) Common Retaining Wall <br />c) Soil Nailed Wall <br />d) Mechanically Stabilized Earth Retention Systems <br />e) Micropiles <br />f) Rock Bolts or Anchors <br />eiawev nn:neeMV.ooe Golder Associates <br />