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TABLE 2-2 <br />MINE WATER BALANCE <br />WATER IN GALLONS/YR GALLONS/MIN <br />Production Equipment 28,045,800 53.36 <br />Ventilation Humidity 9,349,695 17.79 <br />Underground Storage of Thickener Water 12,250,000 23.3 <br />Incidental (pipe leaks, road) watering, wash down 2,804,580 5.34 <br />TOTAL 52,450,075 99.79 <br />WATER OUT <br />Coal Surface Moisture 24,776,561 47.14 <br />Ventilation Humidity 19,499,567 37.10 <br />Pumped Out 0 0 <br />TOTAL 44,276,128 84.24 <br />Water Left Underground 8,173,947 15.55 <br />Water pumped from B seam to D seam 4,204,800 8.00 <br />' Inaoina Water The production equipment utilizes water for dust control and cuttings removal <br />in roof bolting. Water used by equipment is based on 695 shifts worked by continuous miner <br />' sections and 246.6 shifts worked by the longwall. The continuous miner sections use 100 <br />gpm and operate about 3 hours per shift (the rest of the time is spent moving, etc.). The <br />' 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 monthly <br />t mean temperatures from Figure II.C-2 on page II.C-9 of the Mining Permit and the yearly <br />mean relative humidity of 56% found on page II.E-1 of the Mining Permit. The absolute <br />humidity, the actual amount of water in the air, is calculated from these data and an average <br />' ventilation quantity of 482,000 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 the <br />~ water used for production equipment will be used under this category. <br />8 <br />