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Uncompahgre Engineering, LLC <br /> P.O. Box 3945 <br /> Telluride, CO 81435 <br /> (970) 729-0683 dballode@msn.com <br /> March 5,2020 <br /> To: Mike Rutter <br /> Pinon Ridge Mining, LLC <br /> RE: Sunday Mines Group,Ore Pad Installation <br /> Dear Mr. Rutter: <br /> This letter is to serve as a record of inspection and certification that the Sunday Mines Ore Pads were <br /> constructed according to the plans and specs set forth in Uncompahgre Engineering's "Ore Pad <br /> Construction Project" dated 12-17-19. Attached as Exhibit A are all of the compaction test results that <br /> were performed by Trautner Geotech(out of Durango,CO)during construction. <br /> Grading Inspections/Compaction Testing were performed at 3 phases of the project: <br /> 1)The subgrade prep just prior to the liner being installed. <br /> 2)After the 12"of 3/8"material was installed on top of the liner. <br /> 3)After final grading had been done. <br /> The liner was supplied and installed by H& H Linings(Fruita,CO). The liners all came in one-piece(no <br /> field-welding)and were visually inspected after they were rolled out to insure there were no holes. <br /> The grading work was performed by ACM Excavation(Redvale,CO)and was excellent,following all <br /> good construction practices. All of the compaction tests exceeded the minimums set forth in the plans <br /> and specs. <br /> If you need any additional information,please let me know. It is my engineering opinion that the job is <br /> complete. <br /> Sincerely, <br /> `D, /1 ill4(7 <br /> David Ballode, P.E. <br /> Uncompahgre Engineering, LLC O 3A& �; �I <br /> t 29645 <br /> ,, 3-f-21 <br /> ,ftori, At. <br /> Page 1 of 1 <br />