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COLORADO <br />Division of Reclamation, <br />A7 Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />October 8, 2015 <br />Scott Wanstedt <br />Blue Mountain Energy <br />3607 County Rd. 65 <br />Rangely, CO 81648 <br />RE: Minor Revision 166 - SDH3 (D -Seam) Dewatering and Treatment System Expansion - Preliminary <br />Adequacy Review <br />Dear Mr. Wanstedt, <br />The Division of Reclamation, Mining and Safety (the Division) has received the Deserado Mine's 17 <br />September 2015 submittal of the Minor Revision 166. The revision was called complete on 28 September <br />2015. <br />Minor Revision 166 included revised pages, maps and an illustration with information relating to the <br />proposed SDH -3 expansion. A SEDCAD analysis was provided for a 10 year/ 24 hour event and a 100 year 1 <br />24 hour event. <br />The Division has reviewed the MR -166 submittal and has the following adequacy questions. <br />Rule 2.10 Maps and Plans <br />Map 140, Map 143 and Illustration 56 <br />1. Both of the maps and the illustration submitted did not include elevations or contour <br />intervals. Please update Map 140, Map 143 and Illustration 56 to include elevations and <br />contour intervals. The contour intervals can be placed in the map and illustration <br />legends. <br />2. Map 140 does not include a title for the cross-section line for the dewatering system. Please <br />give the cross-section a title, A -A' or similar name, to clarify the correlation of the <br />diagram and its position on the map. <br />3. Map 143 and Illustration 56 do not have a north arrow. Please update Map 143 and <br />Illustration 56 to include a north arrow. <br />Rule 4.05.9 Impoundments <br />SEDCAD for SDH -3 Pond Expansion <br />Cp�0f'.... <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us I <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director * 1876 <br />