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Geotechnical Evaluation of Mine-Induced Earthquakes on Bruce Park Dam <br />Bowie Resources, Limited <br />June 2002 <br />TABLE 4.7 <br />RESULTS OF THE DEFORMATION ANALYSES ON POST-FAILURE <br />LANDSLIDE FOR SINGLE EVENT <br /> Permanent Deformation <br />(inch) <br />Case Phreatic Surface ML 4.2 ML 2.5 ML 2.0 ML 1.75 <br />a Coinciding with the ground surface 9.3 0.44 0.14 0.06 <br />b Mid-depth 1.45 0 0 0 <br />c Top of bedrock 0.28 0 0 0 <br />As explained in Section 2.2, we conservatively considered a total of 100 magnitude 1.75 <br />events, 20 magnitude 2.0 events, and 5 magnitude 2.5 events in a period of 2 years of mining. <br />The total permanent deformations for the three groundwater conditions are summarized in <br />Table 4.8. <br />TABLE 4.8 <br />ESTIMATED CUMULATIVE PERMANENT DEFORMATIONS <br />Case Phreatic Surface Total Permanent Deformation* <br />inch <br />a Coinciding with the round surface 11 <br />b Mid-depth 0 <br />c To of bedrock 0 <br />Note: <br />* For a total of 100 magnitude 1.75 events, 20 magnitude 2.0 events, and 5 magnitude 2.5 <br />events in a period of 2 years of mining. <br />02-05-22 Geotechnical Evaluation of Mine-Induced Earthquakes <br />GEI Consultants, Inc. 18