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i~ <br />• <br />Detailed Description ofMitigaHngMeasures - 2.05.6 (6)(f)(iv)(A D) <br />Impacts to structures (buildings) and ground and surface water resources will be monitored and <br />mitigated, if necessary, as presented later in this section, in~ Section 2.04.7(3) in Section <br />2.05.6(6)(e)(ii)(A-C), in Exhibit 19C, and in Exhibit 52. Monitoring personnel (e.g. hydrology, <br />subsidence survey) are regulazly in the field throughout the pernut azea and note observations of <br />cracking, landslides, rockfalls, or other natural and/or subsidence hazards or impacts. The private <br />landowner in the Jumbo Mountain lease tract also observes and reports cracking, sliding, or other <br />unusual, conditions. Should cracking or blockage of a trail or an unimproved road that is open for <br />use (i.e. is not blocked, reclaimed, or otherwise "closed" from use) occur from subsidence, the <br />damage would be repaired (i.e. fill crack, buttress, install drains, or remove blockage etc.) or the <br />area barricaded or blocked to prevent access. MCC will also place an informational sign along the <br />primary public access to the U.S. Forest Service lands for mining and/or natural hazards awareness. <br />If stream channels are impacted by subsidence, efforts will be made to repair the channel to ensure <br />that flow continues in the channel. If cracking, headcutting or significant channel incising occurs, <br />MCC will evaluate the channel morphology and prepare a mitigation plan. MCC will repair <br />impacts of subsidence on surface drainages on Forest Service ~, lands (or other private lands), <br />including revegetation as necessary to control erosion. For any impacts occurring on Forest Service <br />land, MCC will consult the Forest Service immediately to deteimine a) the level of mitigafion <br />needed, and b) the feasibility of employing the proposed mitigations. Should these impacts occur <br />on Forest Service lands, MCC, in conjunction with the Forest Service, will evaluate the impacts on a <br />case by case basis to assess the most appropriate mitigation. i MCC will seek Forest Service <br />approval for any mitigations) on Forest Service lands. <br />Detailed Description of Measures to Determine Deeree of Damage - 2.05.6 (6)(t3(vl /A&B <br />As discussed previously, all structures and renewable resource's in the permit area have been <br />located, inventoried and/or mapped (see Map 34, Map 37, Map 67, and, Exhibit 10, Exhibit 10A, <br />Exhibit IOB, and Exhibit l OC) as part of the baseline analysis. The location of current and planned <br />mine workings is shown on Map 50, Map 51, and Map 52. The subsidence monitoring program is <br />discussed in Section 2.05,6(6)(c)(i)(A, B, and C) monitoring of the only building undernuned is <br />discussed in Section 2.05.6(6)(e)(ii)(A-C). This baseline analysis establishes the status of these <br />features prior to mining. Departures from this baseline resulting from mining impacts will be <br />evaluated and mitigated in accordance with the regulations. ' <br />Schedule for Submittal of Detailed Plan of Underground Working - 2.05 6 (6)(n(viil <br />• <br />The F-Seam workings in the West Elk Mine are depicted on Map 50. MCC's B-Seam workings and <br />mine plans are shown on Map 52. Mine plans for the E-Seam are shown on Map 51. Longwall <br />panels will continue to be developed and recovered as described earlier in this section. <br />2.05.137 March 2005PR11 <br />0 <br />~l <br />