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<br />Mrs. Judy Sappington <br />State Engineer's Office <br />August 25, 1992 <br />Page 3 <br />2., Operational Losses <br />a. Moisture Loss in Material <br /> <br />There will be excavation and sale of material from the <br />property. It is anticipated that a maximum of 300,000 tons of <br />material will be mined and washed from 83rd Joint Venture <br />Resource this coming year. A 98 moisture content as suggested <br />by the State Engineer would equate to 8.83 acre-feet per year. <br />The monthly breakdown of sale of materials is listed on Table <br />No. 1. <br />b. Dust Control <br />Water will be withdrawn from the pit which will be used for <br />dust control on the haul roads. It is estimated the roads <br />will be watered two times per day on the average using a water <br />truck with spray heads. There will be approximately 1950 <br />linear feet of haul road that will be constructed on the site. <br />The application rate is approximately 1/8 inch and, therefore, <br />0.022 acre-feet of water will be applied daily. <br />The average number of days water will be applied to the haul <br />roads will be 140 per year. This equates to 3.13 acre-feet <br />annually. it is assumed the water applied to the road will be <br />fully consumed. The monthly projected use of water for dust <br />control is listed on Table No. 1. <br />c. Washing Operation <br />A wash plant will be set up on the site. Water will be cycled <br />through the plant, captured and routed to a three cell pond, <br />and then recycled again. It is expected the total area of the <br />pond will be a maximum of 0.7 acres in size. The evaporative <br />loss from the pond is addressed above in this report. <br />The wash water is physically captured in the plant and is <br />carried by a pipe to the wash pond. All losses will be <br />negligible with the exception of evaporation from the ponds <br />and the water retained in the sand and gravel. Both of these <br />losses were presented above. <br />