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1 <br />1 <br />meter records taken by mine personnel and analyzing laboratory moisture <br />' analyses. For 1985. 5.1 acre-feet was estimated to be diverted into the <br />mine for duet suppression purposes. For future production. it is <br />' estimated that 8.6 acre-feet will be required. Duet suppression water <br />also includes moisture naturally contained within the coals and mine <br />' seepage. The consumptive use of the water used for inside due[ <br />suppression is different than the total amounts of water used. because <br />some of the water remains on the raw coal and is transported out of the <br />mine to the preparation plant, <br />Results of laboratory analysis by the mine shove that 9.58 percent by dry <br />weight of whole core samples ie the moisture retained after draining by <br />gravity. or specific retention. This ie equal to 8,33 percent by wet <br />weight of the raw coal leaving the mine. The difference in the raw coal <br />between total moisture (15.0 percent by vet weight of raw coal) and <br />specific retention (8.33 percent bq vet weight of raw coal) is, therefore. <br />consumptive use (6.67 percent by weight of raw coal). At the 1985 rate of <br />production of raw coal leaving the mine. this is equal to as annual <br />consumptive use rate of 22.8 acre-feet. This consumptive use rate may <br />I increase proportionally with increased coal production. to a maximum of <br />38.3 acre-feet per year at peak production of 500.000 tone per year. <br />Dast Sappresaion Ontaide !tine <br />According to Southfield Hine personnel. average work-day eater <br />requirements for outside dust suppression are not more than 5.000 <br />gallons. Outside duet suppression watering is conducted for 8 months of <br />the year. or about 175 working days assuming a 5-day work week. Annual <br />water requirements are estimated to be 2.7 acre-feet. This eater <br />requitement ie 100 percent consumptively used. Pu[ure consumptive use <br />will be [he same as present consumptive use since the area of surface <br />disturbance will not change. <br />-22- <br />