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NQV 6'97 15:19 FR BRRR ENGINEERING 612 832 2601 TO 9295595--0626016 P, 04110 <br />Toe Norm Emory <br />Flom: Philip B. BoLeng <br />9abjs:.t Weet Elk Mina~I.aadalide <br />Dab: November 6, 1997 <br />Proi.ea 0626U14SWW001 Paaa3 <br />(d} W-1 currently has about 82 feet of water and is slowly raising after <br />being pumped. Current elevation of water is about 6262. <br />The data indicates that W-IB and W-lE are strongly connected to the <br />pumping well (W-1) and that perhaps W-1D is draining into W-1 from <br />above. Pln interesting feature is that the water levels in W-1, W-1B and <br />W-lE are at about the same elevation as the observed slip plane in I-6 and <br />I-7. <br />5. The reported "hangup" in I-6 at 78 feet below the ground surface and the <br />"mucky" soil in W-1C at 104foot depth closely match a potential deeper <br />failure plane just above the cobble layer at the colluvium/bedrock interface. <br />The reported voids in PP-4 and I-6 (adjacent borings) together with the <br />reported soft drilling conditions immediately below the voids and just above <br />the bedrock also suggest a deeper failure plane above the cobble layer. <br />6. The reported weak mudstone in the bedrock in boring SB-1 indicates a <br />potential failure plane in the bedrock, at least at the toe of the landslide. <br />The relatively thin interbedded layers of shale, coal and sandstone above <br />the underlying massive sandstone throughout the landslide azea suggest a <br />potential for a shear plane within the bedroom if water is present. As <br />indicated by W-1, water is present above the massive sandstone. The <br />massive sandstone, however, appears to be relatively impervious and dry. <br />7. The fill placed just upslope frrom the fresh water pond could be blocking the <br />normal seepage paths and causing a ° dam''. However, discussion with <br />Norm Every indicate that the fill may be acting as a buttress in retaining <br />the substation. <br />osssou~s4ea1•vcET <br />