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<br />materials to the base of the cliff. Topsoil materials will be pushed up this slope
<br />with a bulldozer, resulting in a layer approximately one to two feet thick, ready
<br />for subsequent seeding and revegetation.”30
<br />The 2000 Amendment also prescribes the placement of approximately 1 foot of top soil on all
<br />disturbed areas and on all 1.5Horizontal:1Vertical slopes and revegetation of the topsoiled
<br />areas.31
<br />The 2000 Amendment contains an appendix (Appendix A) that includes two engineering reports
<br />prepared by Dr. John F. Abel, Jr. prepared on August 20, 2000 and September 13, 2000.32, 33
<br />The reports provide slope design criteria and engineering review of the slope design,
<br />respectively. The latter report concludes, “The top/down mining plan, the planned slope angles
<br />and the strength of the Pikes Peak granite should assure safety during excavation and the long-
<br />term stability of the high wall.” 34 Dr. Abel’s reports were peer reviewed by Colorado Division
<br />of Minerals and Geology in a memo dated December 20, 2000.35 This memo concluded. “If, at
<br />depth, geologic conditions do not drastically change, the proposed highwall configuration has a
<br />high probability of remaining stable after the site is reclaimed (a degree or two change in the
<br />dipping joint sets will not be considered drastic enough to be concerned with).”36 The
<br />engineering nature of the quarry design in the 2000 Amendment is further highlighted by
<br />technical nature of Adequacy Review comments and the engineer’s responses.37, 38, 39, 40
<br />
<br />30 Permit Application Amendment, Pikeview Quarry, Permit Number M-77-211, Received by Colorado Division
<br />of Minerals and Geology on September 22, 2000, page 9 (Appendix 14)
<br />31 Permit Application Amendment, Pikeview Quarry, Permit Number M-77-211, Received by Colorado Division
<br />of Minerals and Geology on September 22, 2000, page 16 (Appendix 14)
<br />32 John F. Abel, Jr., Rock mechanics slope design criteria, Pikeview Quarry Layback Project, August 24, 2000
<br />(Appendix 27)
<br />33 John F. Abel, Jr., Review of slope design for Pikeview Quarry Amendment, September 13, 2000 (Appendix 28)
<br />34 John F. Abel, Jr., Review of slope design for Pikeview Quarry Amendment, September 13, 2000 (Appendix 28)
<br />35 State of Colorado, Division of Minerals and Geology, Pikeview Quarry Slope Stability, M-77-211,
<br />December 12, 2000 (Appendix 29)
<br />36 State of Colorado, Division of Minerals and Geology, Pikeview Quarry Slope Stability, M-77-211,
<br />December 12, 2000 (Appendix 29)
<br />37 State of Colorado, Division of Minerals and Geology, Adequacy Review, Pikeview Quarry Amendment No. 3,
<br />Add 26 Acres and Layback Highwall, File No. M-1977-211 (Appendix 30)
<br />38 Banks and Gesso, LLC, Response to Adequacy Review, Pikeview Quarry Amendment Number 3, File Number
<br />M-1977-211, Castle Concrete Co. January 24, 2001 (Appendix 31)
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