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Mine water inflow was collected in a sump and discharged from <br /> the mine by pumping. Table 3 presents average daily discharge from the <br /> mines (calculated from daily pump records and averaged for each month. <br /> Figures 3 and 4 graphically displays this hydrograph for 1987 and 1988 . <br /> Average daily discharge ranged from 31 , 014 gallons per day (gpd) during <br /> mid January 1987 to 444,064 gpd during February 1988 . Extremes in <br /> average daily discharge are usually explained by pump efficiency since <br /> flow measurements are based on pump hours . As indicated, a major flow <br /> increase was observed in December 1987 . This was a result of increased <br /> flow encountered during mine development activities during that period. <br /> As indicated, the inflow increased during January and February 1988 and <br /> then decreased throughout the remainder of 1988 . <br /> When relating calculated discharge to the inflow results, <br /> correlation of inflow to discharge is relatively close . An inflow of <br /> 160 gpm relates to 230, 400 gpd. Pump records are near this inflow <br /> during November 1988 when the inflow study was conducted (Table 3 ) . <br /> New Elk Mine <br /> At the New Elk Mine, thirteen sources identified in the 1983 <br /> mine inflow survey were examined. No additional sources were found <br /> other than those thirteen, of which three were dry. Table 4 presents <br /> the location, probable water source and estimated gallons per minute <br /> (gpm) for each of these sources. Major sources were measured <br /> volumetrically while seepage and weeping faces were estimated. A total <br /> of 123 gpm inflow was estimated. Of that amount, approximately 109 gpm <br /> is being generated from mined out areas totaling approximately 2,800 <br /> acres (sources 3, 4 , 5 , 8 , 9 , 10, 11 , 12 and 13) . <br /> Representative water quality of the inflow was measured . <br /> Table 5 presents the temperature, conductivity and pH of each source. <br /> Quality of those sources seeping from gob or abandoned mine areas was <br /> higher in temperature and conductivity than those areas of current <br /> workings. Quality ranged from 762 to 3, 540 umhos conductivity, 9.9 to <br /> -64- <br />