Laserfiche WebLink
from seepage originating in the coal seam. <br /> Representative water quality of the inflow was measured. <br /> Table 2 presents the temperature, conductivity and pH of each <br /> source. Quality ranged from 12 . 0 to 21 degrees C. temperature, 100 <br /> to 725 umhos/cm conductivity, and 7 . 5 to 8.4 S.U. pH. <br /> Mine water inflow is collected in a sump and discharged <br /> from the mine by pumping. Table 3 presents average daily discharge <br /> from the mines (calculated from daily pump records and averaged for <br /> each month) . Figures 3 and 4 graphically displays this hydrograph <br /> for 1988 and 1989. Average daily discharge ranged from 229, 400 <br /> gallons per day (gpd) during June 1989 to 321, 800 gpd during <br /> February 1989. Differences in average daily discharge are usually <br /> explained by pump efficiency since flow measur ents are based on <br /> pump hours. This was a result of increased flow encountered during <br /> mine development activities during that period. Inflow has been <br /> static throughout 1988 and 1989. <br /> New Elk Mine <br /> At the New Elk Mine, thirteen sources identified in the <br /> 1983 mine inflow survey were examined. No additional sources were <br /> found other than those thirteen, of which three were dry. Table <br /> 4 presents the location, probable water source and estimated <br /> gallons per minute (gpm) for each of these sources. Major sources <br /> were measured volumetrically while seepage and weeping faces were <br /> estimated. A total of 78. 5 gpm inflow was estimated. of that <br /> amount, . approximately 70 gpm is being generated from mined out <br /> areas totaling approximately 2 ,800 acres (sources 3 , 4 , 5, 8 , 9 , <br />