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Twentymile Coal, LLC. <br />Page 4 <br />November 16th 2018 <br />and reservoir embankment. Regardless, until the permanent impoundment demonstrations have <br />been approved, the embankments of Cells 1, 2, 3, 4 and the 6MN Reservoir must be backfilled <br />and graded into the ponds and the north and south diversion must be reclaimed. The area affected <br />by these activities will need to be topsoiled and revegetated. Please update the reclamation plan <br />narrative and provide an updated post mine configuration of the proposed project area in <br />accordance with Rule 2.05.4. Partially address: Please provide an updated post mine <br />configuration of the reclaimed reconstructed drainage for the proposed project area. <br />14. Proposed pages 2.05-106 to 106.1 indicates that TC intends to retain both the passive water <br />treatment system and 6MN Reservoir as permanent post -mining features. However, TC also <br />indicated that they will prepare a permit revision for permanent retention of the treatment system <br />and reservoir prior to final reclamation and bond release. Please remove the language on <br />proposed revised page 2.05-106 that TC proposes to retain the passive water treatment system <br />and the 6MN Reservoir as a permanent postmining feature. The language on proposed page 2.05- <br />106.1 that TC will seek future approval to leave the passive water treatment system and the 6MN <br />Reservoir as permanent impoundments may remain in the text, but please add that TC will <br />reclaim these features until such a permit revision has been approved by the Division. Addressed <br />with 11/13/2018 submission <br />15. The North and South diversions must be removed and reclaimed in accordance with Rule <br />4.05.3(6). Please revise the reclamation plan to address reclamation of the north and south <br />diversion ditch. Addressed with 11/13/2018 submission <br />16. Based on your responses to the items above, please provide an updated reclamation cost estimate <br />for the reclamation of the passive water treatment system in accordance with Rule 2.05.4(2)(b). <br />The current cost estimate approved for the Foidel Creek Mine already includes the reclamation of <br />the 6MN reservoir so the estimate does not have to include a cost for the reservoir. Once an <br />updated reclamation plan has been agreed upon, the Division will conduct a liability estimate. <br />Not yet addressed. Please ensure all currently proposed items to be reclaimed are included <br />in an updated estimate. <br />17. Please submit a revised Map 29, Reclamation Plan Map depicting the post mine configuration of <br />the water treatment cells and the 6MN Reservoir. Not yet addressed <br />18. In accordance with Rule 2.05.4(2)(h) on proposed revised page 2.05-122.1, please provide a <br />narrative that TC is seeking the approval of a new CDPS permit to discharge water from the 6MN <br />reservoir and the discharge will not occur until this permit is in place. No longer applicable to <br />this revision as discharge is not being proposed. <br />