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MINE WATER Mine inflows studies were done in both mines near the end of September 1990. The results of these studies is shown on table M90-1 and M90-2. The location of the sampling points are shown on the 1990 Mine Inflows Map. The mine inflows from the Roadside Mine were split between discharge to the surface, discharge to abandoned portions of the mine and consumptive use. Discharge to the surface was varied according to the needs at the time. Discharge from CDPS point 001 generally includes all or part of the water from location 3 in the mine inflows study. During January through May portions of the flow from location 5 was also discharged from this location to increase the volume of water available for consumptive use. No discharge was made from CDPS point 002 during the year. The discharge to abandoned areas of the mine are not measured. The water level in the mine is shown on the Mine Inflows map. Recent readings indicate a 3.0' rise/month. At that rate, it is estimated that water will discharge from the old NW intake Portal in December 1992. Consumptive water use is discussed in the next section of this report. The Roadside Mine inflows showed a slight decrease over the past few years. Location 2 flow was lower because the mine was sealed above a portion of the inflows that made up the old Location 2. Location 5 showed a lower flow because part of the flow was • diverted to the 7 West Sump and is included in the new Location 18 flow. The mass average pH for the inflows was 8.4 and the mass average conductivity was 902.7 umhos/cm. The mine inflows from the Cameo Mine were all discharged to the surface. The water in the sealed No. 1 East Mains is drained at a variable rate, therefore, the higher flow calculated at Location 8 may not represent the actual inflows. As shown on Table 590-10, the inflows varied seasonally. Considering the seasonal nature of the inflows the total inflows should have been less than in 1989 because of the lower river flow and lower precipitation. The reason for the increased flow is unknown. The mass average pH for the inflows study was 8,3 and the mass average conductance was 2709 umhos/cm. The average pH and conductance for the total discharge were 8.6 and 2633 umhos/cm. CQNSL71~'PIVE IISE A montY,ly listing of domestic water usage is shown on Table C90-1. Meter 1 supplies the buildings near the Roadside entrance gate. Meter 2 supplies the preparation plant and the Roadside office and bathhouse. Meter 3 supplies the Cameo facilities. As suspected in the ?989 AHR a water line leak was found resulting