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Eipvi* roipnpeipt, <br /> LARRY E.O'BRIAN 7985 VANCE DRIVE,SUITE 205A <br /> FOUNDER ARVADA,COLORADO 80003 <br /> STEVAN L.O'BRIAN 303-423-7297 <br /> PRESIDENT FAX 303-423-7599 <br /> December 23 , 2020 <br /> RE(: VED <br /> Mr. Patrick Lennberg DEC a 8 2020 <br /> Division of Reclamation, Mining & Safety <br /> 1313 Sherman St. , Suite 215 DMSION OF kECLAMATION <br /> Denver, CO 80215 MINING ANDSAFETy <br /> Dear Patrick; <br /> RE: Summit Brick and Tile Company <br /> Native/Pierre Mine - M-1977-321 <br /> Preliminary Adequacy Response 01 <br /> On behalf of my client Summit Brick and Tile Company, I am <br /> responding to your adequacy review letter dated December 16, <br /> 2020 . I have included your review points that need to be <br /> addressed in the order presented in this cover letter so the <br /> questions and answers will be in the same document for easy <br /> future reference. <br /> EXHIBIT L-Reclamation Cost Estimate(Rule 6.4.12): <br /> 1. The Division reviewed the updated cost estimate and concurs that the financial warranty be set at <br /> $26,900 with approval of the application. <br /> Thank You. <br /> EXHIBIT S-Permanent Man-made Structures (Rule 6.4.19): <br /> 2. Please provide the SLOPE/W slope stability analysis data from the Jesik Consulting report to <br /> allow the Division to duplicate the analysis with Clover Technology's Galena software for <br /> verification purposes. <br /> This information is provided in the last 38 pages of the Jesik letter response addressing <br /> this item and #4. <br /> 3. Please provide the geotechnical borehole data and location map for Division review. <br /> Attached is the Bore Hole Data and Location Map Prepared by Jesik for the mine area. <br />