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Memo to Dave Berry <br />Bowie No. 2 Geotechnical Adequacy Responses <br />page 9 <br />near subcrop areas of the mine, should verify the propriety of this <br />assumption in the shallow overburden portions of the mine plan. <br />1.5 BREAK ANGLES <br />Page 12 of Exhibit 15, as amended, now corresponds with my <br />understanding of the implications of the term "Break Angle". The <br />proposed monitoring scheme should determine the actual distribution of <br />surface cracking. <br />1.6 ZONES OF POTENTIAL FRACTURING <br />Paragraph 1 <br />The new Section 1.8, added by BRL to Exhibit 15 addresses the Division's <br />general concern regarding the possible subsidence implications of mining <br />encountering a significant discontinuity, such as a fault. The proposed <br />rock mechanics investigations and enhanced visual monitoring in the near <br />surface faulted portions of the Mine should detect any undesirable <br />phenomena, allowing remedial techniques to be applied in a timely fashion. <br />Paragraph 2 <br />This concern has been previously addressed and resolved. <br />1.7 ZONES ALONG OUTCROP BARRIER PILLAR <br />Paragraph 1 <br />No comment was required by BRL -none was tendered. <br />Paragraph 2 <br />The amendments proposed by BRL to pages 14 and 15 of Exhibit 15 clarify <br />the design intent of the outcrop barrier pillar and resolve my earlier <br />adequacy concerns. <br />