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<br />Kerr - Pump Test Results ~ ~~ (~ O~~ <br />12/21/79 _ / <br />Page Tr.•o <br />• The second test on well 028-79-14 ;acs a drawdown test of the <br />siltstone la}•ers 100 feet beneath the coal seam, using wells 025-79-15, <br />79-16 and 79-60 for observation. Graph ~4 sho;on that transmissivity <br />of these saturated rocks is 3.4 ft2/day and permeability is 0.02 ft/day. <br />These numbers indicate very low permeability. The closest observation <br />well was only 20 feet away from the pumped well and did not react to <br />the test. Since the observation wells were finished in the teal seam, <br />the saturated rocks underlying the coal seam must be confined b, shale <br />layers and groundwater cannot flow to or from the coal seam to she <br />rocks below. <br />In conclusion, the Sudduth coal seam is saturated and perr.eable <br />in the 22777 lease area, but it is confined above and below by scale <br />• layers. The rocks above the coal seam are apparently dry. The faults <br />encountered during the drilling program act as barriers to grow^dwater <br />flow. Therefore, when the pits are opere3 in the lease area, the <br />only groundwater aquifer to contend with will be the coal seam itself, <br />The east highwalls will be dry and the west highcvalls should not <br />release water to the pit. Sum?s in the pit will be needed since <br />mining will dewater the coal aquifer. The water in the nits may have <br />to be pumped continuously. More data is needed from the U.S.G_S., <br />and another pump test in the northern part of the lease area may be <br />needed to determine the rate and amount of water inflow to be handled. <br />G ~~- <br />GPSaunders <br />~J <br />- -.~- <br />