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beak <br />• holes were located at the edge of road fill. The holes encountered alluvial <br />sand, silt, and gravels from 12 to 50 feet. The hole made less than 1 gpm in <br />the gravel. Water elevation in the hole roughly corresponded to the river <br />elevation. The E seam was encountered at about the same elevation as in the <br />first hole. <br />In all three holes the coal was dry. Though the lithology below the <br />coal was about the same in the first two holes, the second hole made water in <br />a sandstone layer which was dry in the first hole. The third hole did not <br />reach that depth. <br />rnuri ncTnnic <br />1. The colluvium and fill have buried a river terrace of tan sand and <br />alluvial gravels. About 5-10 feet are saturated to a level which roughly <br />• approximates the river elevation. The transmissibility appears to be quite low <br />due to the less than 1 gpm flow. <br />2. Even though the coal is downdip of the subcrop into the alluvial <br />aquifer, the coal is dry. Therefore, the coal must not have a fracture system <br />(secondary permeability) to transmit water in this area. <br />3. Sandstone is usually assumed to have primary permeability (interstitial <br />pores). Examination of core samples by K.C. Bowman (l•1SC Geologist) showed <br />that the cement for the sandstone had filled these interstitial pore spaces. <br />Therefore, fracture systems of secondary permeability would be needed to transmit <br />water. The second hole seems to have intersected such a fracture system <br />while the first hole did not. <br />• 4. Somewhere between the first and second hole locations is the boundary <br />- 3 - <br />