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TABLE 2-2 <br />MINE WATER BALANCE <br />WATER IN GALLONS/YR GALLONS/MIN <br />Production Equipment 43,177,500 82.15 <br />Ventilation Humidity 9,781,360 18.61 <br />Underground Storage of Thickener Water 6,500,000 12.37 <br />Incidental (pipe leaks, road watering, wash down) 4,317,750 8.21 <br />TOTAL 63,778,810 121.34 <br />WATER OUT <br />Coal Surface Moisture 28,394,366 54.02 <br />Ventilation Humidity 20,399,841 38.81 <br />Pumped Out 0 0 <br />TOTAL 48,794,208 92.84 <br />Water Left Underground 14,982,402 28.51 <br />Water pumped from B seam to D seam 7,884,000 15.00 <br />Inaoina Water The production equipment utilizes water for dust control and cuttings <br />removal in roof bolting. Water used by equipment is based on 409.5 shifts worked by <br />continuous miner sections and 417 shifts worked by the longwall. The continuous miner <br />sections use 100 gpm and operate about 3 hours per shift (the rest of the time is spent <br />moving, etc.). The longwall equipment uses 150 gpm of water for about 7 hours per shift. <br />The amount of water entering the mine as ventilation intake air humidity is based on <br />monthly mean temperatures from Table II.C-1 on page II.C-5 of the Mining Permit and the <br />yearly mean relative humidity of 56% found on page II.E-1 of the Mining Permit. The <br />absolute humidity, the actual amount of water in the air, is calculated from these data and <br />an average ventilation quantity of 459,732 cubic feet per minute. <br />The smallest quantity of water entering the mine is the incidental category. This category <br />includes leakage from water lines, dust control watering in the haulage entries, and <br />washdown water used in the slope and other locations. It has been assumed that 10% of <br />the water used for production equipment will be used under this category. <br />8 <br />