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West Elk Mine <br />-10 (or lack there of) for constant, high volumes of coal. MCC will notify CDMG if plans that may affect <br />the subsidence profile are implemented. <br />Preventive Measures (Surface) - 2. 05.6 (6)(t)0h)(0 (1--l) <br />Surface measures that may be taken to reduce or prevent damage to applicable structures or water resources <br />could include, but are not limited to; (1) Engineering, design, and construction of structures to withstand <br />varying ground stresses, (2) Re-locating structures or ponds to mid-panel or outside the angle of mining <br />influence, and/or (3) Enhancing or reinforcing water resource production or delivery systems (e.g., pipeline), <br />respectively. <br />A total of five reflector stations will be placed in the ditch at the transition of Deep Creek Ditch to the Dry <br />Fork Basin. They will be surveyed on the following schedule. <br />1) Pre-mining - At least one baseline survey will be conducted within the 30-day period before the <br />longwall starts in Panel E5. If the ditch will be undermined during winter conditions this survey <br />may be done at the end of the period of seasonal access prior to the expected start of mining in <br />panel E5. <br />2) During Mining - Monthly surveying will be conducted while the longwall face is within 1000 <br />feet of being underneath the ditch (if seasonal access permits). This will include mining under <br />Panel E6. <br />3) Post-mining - Monthly surveys will be completed for the first two months after each longwall <br />face has proceeded to more than 1000 feet from being underneath the ditch (or only one final <br />survey will be done if seasonal access is unavailable during the 30-day period immediately <br />following undennining of the ditch). Data from the surveys will be reported in the semi-annual <br />subsidence report. <br />Detailed Description of Mitigating Measures - 2.05.6(6) (f) (iv) (A-D) <br />Impacts to structures (buildings) and ground and surface water resources' will be monitored and mitigated, if <br />necessary, as presented later in this section, in Sections 2.04.7(3) and 2.05.6(6)(e)(ii)(A-C), in Exhibit 19C, <br />and in Exhibit 52. Monitoring personnel (e.g. hydrology, subsidence survey) are regularly in the field <br />throughout the permit area and note observations of cracking, landslides, rockfalls, or other natural and/or <br />subsidence hazards or impacts. The private landowner in the Jumbo Mountain lease tract also observes and <br />---marts cracking, sliding, or other unusual conditions. Roads will be repaired through regarding or filling if <br />adversely affected by subsidence. Should cracking or blockage of a trail or an unimproved road that is open <br />for use (i.e. is not blocked, reclaimed, or otherwise "closed" from use) occur from subsidence, the damage <br />would be repaired (i.e. fill crack, buttress, install drains, or remove blockage etc.) or the area barricaded or <br />blocked to prevent access. MCC will also place an informational sign along the prinnary public access to the <br />USFS lands for mining and/or natural hazards awareness. <br />MCC recognizes that proposed mitigation to surface waters, roads, vegetation, wetlands, etc. on Forest lands <br />in the SOD will be accomplished in accordance with the USFS stipulations specified on the BLM Federal <br />Lease C-1362. This document contains the stipulations agreed to by MCC with the sorest regarding, in part, <br />the mitigation requirements for mining rciatcd li-npacts within the Forests Lands in the SOD area. <br />MCC will repair impacts of subsidence on surface drainages on USFS lands (or other private lands), <br />including revegetation as necessary to control erosion. For any impacts occurring on USFS lands. MCC will <br />consult the USFS immediately to determine a) The level of mitigation needed, and b) The feasibility of <br />employing the proposed mitigations. Should these impacts occur on USFS lands, MCC; in conjunction with <br />4, the USFS, will evaluate the impacts on a case by case basis to assess the most appropriate mitigation. MCC <br />will seek Forest Service approval for any mitigation(s) on USFS lands. <br />2.05-170 Revised June 2005 PRIQ Rev. Alarch 2006; Alai- 2006 PRI Q Azov. 2006TR107,Apri12007TRI08; Sep. 2007 PR12; Feb. 2008 PR-12