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-37- <br /> There are no known users of ground water from these strata within at <br /> least a two-mile radius from the edge of the mine. Therefore, no i-npacts <br /> should result from the dewatering of the mine workings. When mining is <br /> completed in Coal Basin, the :eater levels in the aquifers should showly <br /> return to original , pre-mining elevations. <br /> The disposal of mine and processing waste materials at the mine have the <br /> potential to degrade the quality of the alluvial ground water of Coal <br /> Creek. A geochemical analysis of the roof and floor rock and coal (see <br /> page III-D-37 of the permit application) failed to indicate any toxic or <br /> hazardous materials. In addition, seven years of ground and surface <br /> water monitoring, during which time similar wastes were being disposed <br /> of, indicate no adverse affects to date. Therefore, it is concluded that <br /> this potential impact is insignificant. If an impact were to occur, the <br /> existing monitoring system, is adequate for early detection. <br /> The pro osed rock tunnel at the mine will be con acted into the ?iancos <br /> \ shale formation an procee u e s ra rip c co t <br /> u cn fee cod s _ _Throughout this distance, the <br /> t q MOSS __K }oz ette, a 2s, d it�d�l SdpdS$,�(�e5,�>F yv4 lv.. 'r.%�ve <br /> potential a uifers � -}=�� 1�, the wa ers ot• These aquifers may mix fit <br /> 1�..✓Feeii - - - 1 <br /> �U,rJ . within the tunnel ? -- <br /> ecause of is, it is important that, upon final reclamation, these <br /> ""� , quifers be sealed%ff such that no further mixing would occur. In <br /> addition, t surface seal of the tunnel must be adequate to prevent the <br /> leakag ground water onto the surface. Therefore, the following <br /> sti.pti ation is added to the permit : <br /> k `Stipulation No. 3 <br /> r BY FEBRUARY, 1 , 1984, THE PERMITT SHALL EMIT AN ACCEPTABLE PLAN g:pv�dn <br /> FOR SEALING THE RUCK TUNNEL ADITS. THIS PLAN SHALL CONTAIN, AT Ar <br /> w (� MINIi�IUI�i, SPECIFICATIONS FOR SEALING THE PORTIONS OF THE ROCK TUNNcL,.�' 0 <br /> INK Q ar THAT CROSS THE COZZETTE, ROLLINS, AND MIDDLE SANDSTONES TO PREVENT <br /> FUTURE NIXING OF 'WATERS IN THESE AQUIFERS AND SHALL INCLUq�—� <br /> FOR SEALING E AD ITS TO PREVENT GROUND WATER FROM 7 <br /> SPECIFICATIONS ) c L_ G TH I <br /> V'" y F' WING FROM THE RUCK TUNNEL ONTO THE SURFACE. <br /> A�v����700r <br /> tive Ground Aater Imoacts <br /> t!" <br /> le � this five-year aermit period, the impacts of the Sunlight Mine, <br /> ) a< <br /> the North Thompson Creek 'lines and tine Coal Basin `dines on ground water t4d? <br /> l quality and quantity will oe localized in areas adjacent to the ,mine. 144 i <br /> During the life of the North Thompson Creek %lines and the Coal Basin <br /> it-lines, the areas affected by these mines will eventually join. 'Jhen <br /> these t:vo mines eventually join, . the North Thompson Creek and Coal Basin <br /> mines will both imoacc she ground water in :ne aquifers in the Coal Creek <br /> 3asin. The Suniighc ;line Nill not produce a cumulative ground 'Hater <br /> impact with any other ,nine in the Roaring For'< Drainage during its <br /> i ifc-CT-•nine. <br />