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Mayo and Associates, LC <br />• associated with the Mt Gunnison intrusive is also unlatown and could significantly <br />j increase groundwater rechazge and storage in this area. <br />Irr the B Seam, major fault-related groundwater inflows issued from hydrodynamically <br />sepazate groundwater systems. These groundwater systems were associated with the <br />damage zones of the unnamed, BEM, and 14HG faults (Mayo and Associates, 1998). The <br />Rollins Sandstone between the damage zones was effectively non-water yielding and did <br />not Leak water into mine openings. <br />If fault damage zones in the Bowie Sandstone are water saturated similar groundwater <br />inflows aze possible in the E Seam workings. Because the Bowie Sandstone dips to the <br />• northeast and the fault zones also strike in the same general direction, the most significant <br />inflows would likely occur in the down dip cross-cuts. The anticipated lazge <br />displacement of the 14HG fault and the lazge inflows associated with this fault in the B <br />' Seam suggest that it is susceptible to the lazgest potential inflows. Appreciable inflows <br />could also occur along the BEM fault, however potential inflow rates are likely less <br />' because the total anticipated fault offset in the BEM fault is less than the 14HG fault. <br />The relationship between fault offset and inflow rates is described below. <br />Potential groundwater inflow rates can be estimated by means of a modified version of <br />Dazcy's law. Although many of the pazameters are too uncertain to estimate Q, an <br />examination of the relationship is instructive to see how pressure in the Bowie Sandstone <br />~, as well as total fault displacement would affect inflow rates. The equation is: <br />Evaluation of Potential Groundwater Inflows 63 February 24, 2004 <br />Associated with E Seam Mining, <br />,~ West Elk Mine, Somerset, Colorado <br />