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TABLE 2-2 <br />MINE WATER BALANCE <br />WATER IN GALLONS/YR GALLONS/MIN <br />Production Equipment 39,435,000 75.03 <br />Ventilation Humidity 10,255,139 19.51 <br />Underground Storage of Thickener Water 14,850,000 28.25 <br />Incidental (pipe leaks, road watering, wash down) 3,943,500 7.50 <br />TOTAL 68,483,639 130.30 <br />WATER OUT <br />Coal Surface Moisture 22,176,316 42.19 <br />Ventilation Humidity 21,387,947 40.69 <br />Pumped Out 0 0 <br />TOTAL 43,564,263 82.88 <br />Water Left Underground 24,919,376 47.41 <br />Water pumped from B seam to D seam 7,358,400 14.00 <br />I~raoina Water The production equipment utilizes water for dust control and cuttings removal <br />in roof bolting. Water used by equipment is based on 364 shifts worked by continuous miner <br />sections and 379 shifts worked by the longwall. The continuous miner sections use 100 gpm <br />and operate about 3 hours per shift (the rest of the time is spent moving, etc.). The longwall <br />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 />mean temperatures from Table II.C-1 on page II.C-5 of the Mining Permd and the yearly mean <br />relative humidity of 56% found on page II.E-1 of the Mining Permit. The absolute humidity, the <br />actual amount of water in the air, is calculated from these data and an average ventilation <br />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 washdown <br />water used in the slope and other locations. It has been assumed that 10% of the water used <br />for production equipment will be used under this category. <br />B <br />