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III IIIIIIIII IIII III Doc Date:12111/2001 <br />5~ <br />~~ 2.06.6(61 Surface Yining Nesr Underground Mining ~~ , <br />• Some surface mining is planned within 500 feet of abandoned <br />underground mining. It is expected that some pit areas, namely <br />in mining Phase 1, will intercept some finger ends of abandoned <br />underground workings. Ths intercepts will be encroachment over <br />the old workings as long as it is feasible to do so. This is <br />considered economically justifiable as alwoat no subsidence <br />features are noticed over very shallow underground workings, <br />which strongly suggests significant coal values were left as <br />roof support. The lithology log in Exhibit O shows several feet <br />of shale overlying the coal bed which would offer little support <br />if it were left for the roof. <br /> No underground workings are presently exposed in the <br />• proposed pit area. During the course of the mining operation <br />when they are exposed and mined over the truncated ends will bs <br />sealed in accordance with the requirements of the Division and <br />the Mins Safety and Health Administration. Ses Exhibit M. <br />Old CFBI mine maps are available and show the old workings. <br />Survey control to position the old workings on the surface in <br />the field 1s tied to a '30 inch stack for air shaft' shown on <br />M;ap No. 6 which is still standing. A draglins will be used to <br />clear the overburden from above the old mine workings, and light <br />equipment will bs used for final cleaning of the top of the coal <br />prior to mining. The face of rooms in all old workings will bs <br />kept sealed with coal or overburden between actual removal of <br />the coal overhead to prevent entry. When the highwall is <br />• reached the underground workings will bs sealed as discussed <br />above. <br />