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8/22/2014 State.co.us Executive Branch Mail - Fwd: Bowie No. 2 Mine C1996083 Technical Recision No. 89 Adequacy Response #1 <br />i <br />r , <br />3} � <br />STATE OF <br />COLORADO�1 <br />Burgmaier - DNR, Susan <susan.burgmaier @state.co.us> <br />To: Alysha Hernandez - DNR <alysha.hernandez @state.co.us> <br />Alysha - will you please import this email string into laserfiche? <br />Susan L. Burgmaier <br />Environmental Protection Syreciatist III <br />Coat Regutatory Program <br />COLORADO <br />Division of Reclamation, <br />A&17 Mining and Safety <br />Department of Natural Resources <br />P 303.866,3567 x 8111 I F303.832.8106 <br />1313 Sherman Street, Room 215, Denver, CO 80203 <br />susan.burgmaier @state,co,us I http : / /mining.state.co.us <br />Thu, Aug 21, 2014 at 3:33 PM <br />89 Adequacy Response 41 <br />Tamme - per our recent conversation, I am offering clarification that the ditch cut slopes we are concerned with <br />will be those sections of the ditch in the immediate vicinity of the proposed borrow areas. Our concern is that <br />cutting back the slopes to obtain borrow material may affect the overall stability of the larger land mass above the <br />ditch and borrow areas. <br />You indicated that the cut slopes above the remaining portion of the relocated ditch (not in the vicinity of the <br />proposed borrow areas) will approximate the existing, pre- disturbance slopes. For those portions of the ditch <br />where the cut slope is consistent with the original ground, a slope stability analysis will not be required. <br />Susan L. Burgmaier <br />Environmental Protection Syreciatist III <br />Coat Regulatory Program <br />COLORADO <br />Division of Reclamation, <br />A&17 Mining and Safety <br />Department of Natural Resources <br />https: / /mai l.g oog le.conVmai 1 /u /0 / ?ui =2 &i Ire29129fcb5 &view= pt &search =i nbox&th= 147fa7df6e992582 &si ml= 147fa7df6e992582 1/4 <br />