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b ESERADO MIME <br /> BLUE MOUNTAIN ENERGY <br /> 3607 County Rd.65 <br /> Rangely, CO 81648 <br /> (970)675-4300 <br /> fax(970)675-4399 <br /> February 1, 2022 E C E IVE <br /> FEB 03 2022 <br /> Mr. Clayton Wein DIVISION OF RECLAMATION, <br /> Division of Reclamation, Mining and Safety MINING &SAFETY-MINERALS <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> RE: Technical Revision #73 — DW-111 Dewatering Hole and Pond Technical Adequacy <br /> Review Response <br /> Deserado Mine—Permit No. C-1981-018 <br /> Dear Clayton, <br /> As requested by the preliminary adequacy review of January 27, 2022 regarding TR-73, <br /> Deserado Mine is enclosing a packet of materials that responds to and resolves the items <br /> identified in the letter. <br /> Your original adequacy items and Deserado's response to them have been included below: <br /> Rule 2.05.4(2)(b)—Reclamation Plan <br /> 1. The Division is currently conducting a reclamation cost estimate for TR-73. The <br /> Division will submit a second adequacy to the operator with the reclamation cost estimate <br /> in the near future. <br /> Deserado Mine Response: No response required. <br /> Rule 2.05.6(6)—Subsidence Survey, Subsidence Monitoring, and Subsidence Control Plan <br /> 2. Map 147 indicates that the proposed DW I dewatering well and DW I Pond will be <br /> located to the east of the LW-B 17 longwall panel and to the north of the LW-B 18 <br /> longwall panel. Are the proposed dewatering system components within the angle of <br /> draw from subsidence? If so, is there a plan for monitoring and ensuring the stability of <br /> the structures? <br /> Deserado Mine Response: Based on past experience, the well structure should remain stable <br /> as the specific location of the well in orientation to the panel is not likely to subside. Recent <br /> changes to the longwall plan will result in longwall panel LW-B IS being shortened to the <br /> same length as panel LW-B17. This will result in the pond/road being approximately 700 <br /> feet from the terminal edge of panel LW-B 18 and therefore not likely to be impacted by <br />