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_ Water and Methane Drainage After Oliver No. 2 <br />• Mine Closure ............................................ .... 2.05-128 <br />Methane Concentrations in the Oliver No. 2 <br />Portal Area ............................................... .... 2.05-129 <br />Water and Methane Potential in the B-Seam <br />Oliver No. 2 Mine Area ............................... .... 2.05-129 <br />Potential Impact of Water on Subsidence in West <br />Mining Areas ............................................ ....2.05-129 <br />Modern Methods of Ventilation .......................... .... 2.05-130 <br />Potential Impacts of Subsidence on Landslides ................. .... 2.05-130 <br />Impact of Highway Construction ......................... ....2.05-130 <br />Importance of Baseline Landslide Data .................. .... 2.05-130 <br />Highway 133 Landslides in Relation to Angle of <br />Draw Projections ....................................... ....2.05-131 <br />Impacts Beneath the Mined Coal Bed .................... .... 2.05-131 <br />Possible Subsidence Consequences ....................... .... 2.05-131 <br />Potential Impacts from Local Seismic Activity ........ ....2.05-132 <br />Detailed Description of Damage or Diminution of <br />Reasonable Use Which Could Result from <br />Subsidence Related Phenomena ..................... .... 2.05-133 <br />Subsidence Monitoring Plan ........................................ .... 2.05-134 <br />Monitoring Frequency ...................................... .... 2.05-135 <br />• Subsidence Control Plan ............................................ .... 2.05-135 <br />Description of Mining Methods .......................... .... 2.05-135 <br />Preventative Measures ...................................... .... 2.05-136 <br />Anticipated Effects ................................. ....2.05-136 <br />Reduction Measures (Underground) .......... ...... 2.08-136 <br />Preventive Measures (Surface) ................. ...... 2.05-137 <br />Detailed Description of Mitigating Measures ........ ......2.05-137 <br />Detailed Description of Measures [o Determine <br />Degree of Damage .................................... ...... 2.05-137 <br />Schedule of Submittal of Detailed Plan of <br />Underground Working ............................... ......2.05-138 <br />Protection of Hydrological Balance ............................. ...... 2.05-138 <br />West Elk Mine Experience ....................................... ...... 2.05-140 <br />Regional Mining Experience ..................................... ...... 2.05-145 <br />Probable Hydrologic Consequences ............................. ...... 2.05-148 <br />Surface Water Quantity Effects ......................... ...... 2.05-149 <br />Streams ...................................................2.05-150 <br />Springs/Seeps ........................................... 2.05-157 <br />Reservoirs and Stock Ponds .......................... 2.05-166 <br />Wetlands ................................................. 2.05-167 <br />Water Rights ............................................ 2.05-168 <br />• Water Rights Aspects of North Fork Diversions, <br />Fault Inflows and Sealed Panels Sumps .......2.05-172 <br />xii <br />