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million gallons and the moisture added during cleaning calculates • out to be 4.500 million gallons. The metered mine water in the plant was 3.058 million gallons, resulting in 1.442 million gallons of domestic water being used in the plant. For dust control on roads, both surface and underground, water was used as necessary. Magnesium Chloride was used on roads to better control dust and to reduce the watering requirement. Underground approximately 4800 gallons per day, 2 days per week were used and on the surface approximately 15,000 gallons per day, 3 days per week, 50$ of the year were used. The surface roads are watered with irrigation water from the Highline Canal. A summation of the estimated consumptive use of water is as follows: Total Gallons/ Gallons/ Source Gallons raw ton clean ton Domestic Surface Facilities 1,652,000 4.1 7.8 Preparation Plant 1,442,000 3.8 6.8 Mine Mining 2,380,000 6.2 11.3 Preparation Plant 3,058,000 8.0 14.5 Underground Roads 500,000 1.3 2.4 Highline Canal • Surface Roads 1.,170.000 3.0 5.5 TOTAL 10,202,000 26.5 48.4 IMPACTS The total dissolved solids discharged to the river from mine water was 386.4 tons during the year which represents 0.028$ of the 1.39 million tons calculated to be carried in the River. The discharge to the old mine will eventually cause a discharge to the River. At that time the TDS loading will better represent the long term affect of the mining operation. Again this year there was no detectable affect of mining on the flow in Cottonwood or Rapid Creeks. The mine inflows under these creeks, the combined flow of locations 5 and 18, increased this year. We attribute the increase inflows to mining new areas to the south. Mining will continue to advance to the south and east during the next year and inflows are expected to continue to increase. The refuse piezometers showed little change. A fourth piezometer installed on CRDA No. 1 in October 1991 should give more information on the water level in the pile. Consumptive water usage change very little this year. Roads are • being watered more now than before largely due to an increase in the length of roads used.