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4. A three (3) or four (4) inch pipe will be placed at the top of <br />• the coal seam for bath methane and water drainage from the <br />abandoned workings. <br />The procedures for permanent closure of the portal entries are shown on <br />Figure 3, General Specifications for Permanent Closure of Portal <br />Entries. <br />No drill holes are planned at the present time. However, if any are <br />drilled, each exploration hole, other bore hole, well or other exposed <br />underground well opening will be cased and sealed. The measures to be <br />used to plug, case, or manage exploration holes, other bore holes, wells <br />or other openings within the planned permit area will include filling <br />the hole or opening with cuttings or inert material until it is level <br />with the surface. No holes are expected to flow as a result of artesian <br />conditions; however, if any artesian conditions are encountered, the <br />holes which penetrate these conditions or two or more aquifers with <br />• significantly different groundwater quality will be cased or cemented. <br />Those holes which remain open for use as water supply wells or for use <br />as groundwater monitoring wells will be completed with casing and <br />piezometer at a sufficient height above the land surface to prevent <br />inflow of surface water or entrance of other material into the well. In <br />addition, they will be fitted with caps to prevent introduction of <br />foreign objects, other than monitoring and sampling equipment, into the <br />well. When groundwater monitoring wells are no longer needed or <br />required for any purpose each well will be sealed in accordance with the <br />measures described above. <br />Removal of Surface Structures <br />Embankments and Impoundments. All embankments and impoundments will be <br />completely removed and reclaimed after the termination of mining <br />activities. The sedimentation pond will not be removed until the <br />• affected area serviced by the pond has been restored, vegetation <br />2.05-24 <br />requirements met, and the quality of the drainage entering the pond <br />