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i <br /> <br />Appendu C -Mine InJlaw Study <br />In 1993, inflow was estimated as 178 gpm. The 178 gpm total inflow is equivalent to 287` <br />acre-feet. Flow associated with the fault in SE-1 was approximately 100 gpm. Air shafts, the <br />slope and drill holes (sources 6, 7, 8, 11, 12, 14, 28, 37) account for 9.0 gpm, and the <br />remainder was from seepage originating in the coal seam. Table C-4 presents the conductivity, <br />equation, and pH of some of the inflows. <br />In 1994, inflow was estimated as 78.33 gpm (Table C-2) and is equivalent to 126.3 acre-feet. <br />Flow associated with the fault in SE-1 was approximately 30 gpm. Air shafts, the slope and <br />drill holes (sources 8, 12, 14, 45, 50 and 52) was approximately 17.83 gallons per minute, and <br />the remainder was seepage from the surrounding coal. Table C-2 presents some measurements <br />of temperature, pH, and conductivity. <br />Figure C-2 is a graph of water inflow by type source. Trends suggest a number of hypotheses. <br />There was a significant reduction in flow from the fault. The rise in seepage may be <br />proportional to the area of mined coal as may be the quantity of inflow from shifts and holes. <br />Figure C-3 is a map of mining activity by year. <br />` (181 gpm) x (60 m/h) x (24 h/d) x (365 d/y) _ (7.4805 g/ft') - (43,560 ft/a) =acre feet/year <br />HYDRPT94.292\9\09-28-95(8:09am) C-6 <br />