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Mr. Forrest Luke <br />Page 4 of 4 <br />September 2020 <br />6. Distances between centroids of coal sections meet the requirements of the above <br />mentioned rule <br />7. That undisturbed areas of coal are a minimum of 250 feet wide between each group of <br />auger openings <br />8. Or, that the coal reserves have been depleted. <br />DRMS October 2020 <br />Trapper's responses were adequate. <br />Revised Pages <br />DRMS August 2020 <br />DRMS notes that on revised Pg 3-44 Regrade of Boxcut Spoils, in paragraph one a change from <br />800,000 to 500,000 BCYs from Dec 2019 revised pages for PR9. <br />9. Does the change in BCY's take into account both I and J pits or only Pit? <br />Trapper's response: The Agapito Associates, Inc. report; Evaluation ofI- and J-Pit Spoil Pile <br />Stability, Trapper Mine discusses a spoil pile sized between 500,000 to 900,000 cubic yards. The <br />geotechnical analysis performed on the pile was for the maximum sized pile of 900,000 yards, <br />which represents the worst -case stability evaluation. In the bond calculation, with the mining <br />plan in place currently, we believe it will only be holding 589,950 yards of material at the end of <br />2022. <br />DRMS October 2020 <br />DRMS finds Trapper's response adequate. <br />There may be additional adequacy questions associated with the Worst Case Bond scenario. <br />The CIRCES cost estimate is enclosed submitted with this adequacy for your review and <br />comment. <br />