Laserfiche WebLink
TABLE 2-2 <br />MINE WATER BALANCE <br />WATER IN GALLONS/YR GALLONS/MIN <br />Production Equipment 34,677,000 65.98 <br />Ventilation Humidity 9,781,956 18.61 <br />Underground Storage of Thickener Water 6,750,000 12.56 <br />Incidental (pipe leaks, road watering, wash down) 3,467,700 6.60 <br />TOTAL 54,526,656 103.74 <br />WATER OUT <br />Coal Surface Moisture 23,405,394 44.53 <br />Ventilation Humidity 20,401,084 38.81 <br />Pumped Out 0 0 <br />TOTAL 43,806,478 83.35 <br />Water Left Underground 10,720,178 20.40 <br />Water pumped from B seam to D seam 7,358,400 14 <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 240 shifts worked by <br />continuous miner sections and 357 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 il.E-1 of the Mining Permit. The <br />' absolute humidity, the actual amount of water in the air, is calculated from these data <br />using an average ventilation quantity of 459,732 760 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 />