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• 3.0 RESULTS <br />The average angles of draw calculated from the data in Table 1 are as follows: <br /> <br /> <br />Ribside Geometry Average Angle <br />of Draw <br />(deg) <br />Down-dip ribside 23 <br />Up~Jip ribside 12 <br />Start-up ribside 7 <br />All ribsides 15 <br />The recommended site-specific draw angle is 15 degrees. While subsidence may occasionally occur outside <br />this range, the magnitude of the resulting vertical movement and horizontal strains will be less than that <br />necessary to cause material damage to any of the structures and renewable resource lands present at the <br />Foidel Creek mine site. <br />• <br />1n <br />u <br />W9~ ~ <br />