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Memo to Wally Erickson 5 March 7, 2011 <br />Review of Access Road Geotechnical Stability File No. M-1981-185 <br />Attachment 6.5.3 - Stability Report for Access Road to the Mav Dav Idaho Mine Complex - Prepared b <br />Sakura Engineering - November 8, 2008 (submitted September 29, 2010) <br />19. The cover letter from Mr. Paul F. Martin to Mike Clements with Wildcat Mining Corp. discusses <br />lowering the road capacity rating from 25 tons to 18 tons to increase the safety factor and thereby <br />accommodate emergency vehicles. The equipment required to implement the work proposed in <br />the Mining Plan appears to exceed the decreased weight capacity of the road. Please provide a list <br />of the equipment, including weights, necessary to complete the proposed mining and reclamation <br />activities at the site. <br />20. Section 7, sixth bullet states the final load for the cribbing is 18-tons axle load of 14 tons... Please <br />clarify this is intended as an 18-ton total load, with a maximum axle load of 14 tons and not an 18- <br />ton empty weight axle load plus a 14-ton payload. <br />21. The copies of the hand written engineering calculation pages included in the Sakura report for <br />Division review appear to be reduced in size and are illegible. Please provide legible copies. <br />22. Sakura Engineering As-Built sheets 3 of 16 and 15 of 16 dated October 20, 2009 were sealed by <br />George M. Robinson, Certified Professional Geologist. As-Built Certification by a Professional <br />Geologist is not acceptable. The final As-Built drawings must be approved by a Professional <br />Engineer registered in the State of Colorado. <br />23. Please provide the source of fill material to achieve the proposed 12% grade as indicated on <br />Sakura Sheet 4 of 16, dated October 20, 2010. <br />Attachment 6.5.4 - Geotechnical Reconnaissance, Access Road, Mav Dav Mine, Prepared by R Sauared <br />Incorporated, dated May 29, 2010 (submitted September 29, 20101 <br />24. The Applicant resubmitted the Geotechnical Reconnaissance report prepared by R Squared, dated <br />May 29, 2010 with the conversion (CN-01) application. Division staff previously reviewed the <br />report as part of the Idaho Mine permit application, File No. M-2010-003, and issued review <br />memos dated June 4 and June 7, 2010. The Applicant has not responded to the Division's <br />questions from these memos. Copies of the memos are attached. Please respond to the Division's <br />adequacy questions from the June 4 and June 7, 2010 memos. <br />25. Please provide the Division with a copy of Mr. Martin's report dated May 26, 2010, referenced in <br />the paragraph labeled "Background" and just before the "Conclusions" section. <br />26. Please clarify the Applicant's definition of "roadway fill" in the R2 Inc. report. Does this apply to <br />only the road surface or also to the out slope fill? <br />27. The reconnaissance report recommends the Applicant construct new fill slopes no steeper than <br />1.5:1. Please commit to removing all existing road fill, including slopes and existing timber cribbing <br />structures prior to implementing the required work plan to reconstruct the access road.