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New Elk Mine <br /> At the New Elk Mine, thirteen sources identified in the 1983 mine inflow survey <br /> were examined. No additional sources were found other than these thirteen, of which <br /> three were dry. Table 4 presents the location, probable water source and estimated <br /> gallons per minute (gpm) for each of these sources. Major sources were measured <br /> volumetrically while seepage and weeping faces were estimated. A total of 123 gpm <br /> inflow was estimated. Of that amount, approximately 109 gpm is being generated from <br /> mined out areas totaling approximately 2,800 acres (sources III, IV, V, VIII, IX, X, XI, XII <br /> and XIII). <br /> Water quality of the inflow was also measured during the survey. Table 2 presents <br /> the temperature, conductivity and pH of each source. Quality of those sources seeping <br /> from gob or abandoned mine areas was higher in temperature and conductivity than those <br /> areas of current workings. Quality ranged from 1,830 to 3,540 umhos conductivity, 15.6 <br /> to 18.3 oC temperature and 6.7 to 8.0 S.U. pH. Quality of active areas ranged from 762 <br /> to 1045 umhos conductivity, 9.9 to 15.3 oC temperature and 6.9 to 8.0 S.U. pH. <br /> Mine water inflow was collected in a sump and discharged from the mine by <br /> pumping. Table 3 presents average daily discharge from the mines (calculated from pump <br /> records over each seven day period). Figure 3 graphically displays this hydrograph for <br /> 1985. Average daily discharge ranged from 166,600 gpd during mid October to 692,200 <br /> gpd during late July. A new pump was installed in late July which may account for <br /> calculated discharges during the prior six to eight week period being higher than actually <br /> discharged because of an inefficient pump. <br /> When relating calculated discharge to the inflow results, correlation of inflow to <br /> discharge is relatively close. An inflow of 123 gpm relates to 177,120 gpd. If the period <br /> of discharge during the month of September is examined (that month in which the inflow <br /> study was conducted) results of inflow versus discharge are near equal. Additional <br /> underground seepage which can not be measured is possibly contributing somewhat to the <br /> rate of discharge. Average discharge for the year was 245,500. <br />