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West Elk Mine
<br />Preventive Measures (Surface) - 2.05.6 (6)(fl(iii)(C)(I-V)
<br />Surface measures that may be taken to reduce or prevent damage to applicable structures or water
<br />resources could include, but are not limited to; (1) Engineering, design, and construction of
<br />structures to withstand varying ground stresses, (2) Re-locating structures or ponds to mid-panel or
<br />outside the angle of mining influence, and/or (3) Enhancing or reinforcing water resource
<br />production or delivery systems (e.g., pipeline), respectively.
<br />Detailed Description of Mitigating Measures - 2.05.6(6)(j)(ivJ(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 Sections 2.04.7(3) and
<br />2.05.6(6)(e)(ii)(A-C), in Exhibit 19C, and in Exhibit 52. Monitoring personnel (e.g. hydrology,
<br />subsidence survey) aze regulazly in the field throughout the pemmt azea and note observations of
<br />cracking, landslides, rockfalls, or other natural and/or subsidence hazazds or impacts. The private
<br />landowner in the Jumbo Mountain lease tract also observes and reports cracking, siding, 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 wilt also place an informational sign along the
<br />primary public access to the USFS lands for mining and/or natural hazazds awazeness.
<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 prepaze a mitigation plan. MCC will repair
<br />impacts of subsidence on surface drainages on USFS lands (or other private lands), including
<br />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
<br />of employing the proposed mitigations. Should these impacts occur on USFS lands, MCC, in
<br />conjunction with the USFS, will evaluate the impacts on a case by case basis to assess the most
<br />appropriate mitigation. MCC will seek Forest Service approval for any mitigations) on USFS
<br />lands.
<br />Detailed Description of Measures to Determine Degree of Damage - 2.05.6 (6)(fl(v)(A & B)
<br />As discussed previously, all structures and renewable resources in the permit area have been
<br />located, inventoried and/or mapped (see Maps 34, 37, and 67, and Exhibits 10, 10A, lOB, IOC,
<br />lOD, and 10E, as part of the baseline analysis. The location of current and planned mine workings
<br />is shown on Maps 50, 51, and 52. The subsidence monitoring program is discussed in Section
<br />2,05.6(6)(c)(i)(A-C), and monitoring of the only building undermined is discussed in Section
<br />2,05.6(6)(e)(ii)(A-C). This baseline analysis establishes the status of these features prior to mining.
<br />Departures from this baseline resulting from mining impacts will be evaluated and mitigated in
<br />accordance with the regulations.
<br />Schedule of Submittal of Detailed Plan of Underground Working-2.05.6(6)(~(v)(A&B)
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<br />2.05-I47 Revised November 2004 PRIO
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