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i • The water levels in the refuse piezometers were nearly the same or higher than the past averages. The pH on the piezometers was lower this year than the averages. The conductivities were up and down from the averages. The R-1 May 87 conductivity did not show the normal seasonal variation seen in the past. There were no springs flowing out of the refuse pile. The alluvial piezometers showed water levels in February close to the average, in May higher the average and in September generally lower than average. This pattern may be a result of more intensive spring irrigation in anticipation of low flows later and then the result of low flows. The actual irrigation patterns were not observed. The water levels in the sediment pond piezometers were generally lower than the averages. The average water level in the pond dropped approximately 1.5' to 6324.5' and the average water level in the piezometers dropped 0.3' to 6315.7'. NINE PATER The underground workings were not accessible for mine inflows monitoring in 1987. The 1987 Mine Inflows Map shows projections for the mine filling with water. The maximum measured and estimated total mine inflows for the past four years were averaged for the projected filling rate of 19.5 gpm. The 7 and 8 North panels will fill slowly until water from the rest of the mine reaches the top of the panels in 1989. Using these projections, water would reach the water level of E-1 of approximately 6355' in 1993. The water level is projected to stabilize below the portal according to the~Kanan Tempo Report, Volume 8 of 8 in our permit application. These projections do not account for the reduced inflow rate as the water level raised above individual inflow points. This map represents the maximum filling rate and the actual rate is expected to be slower. CONSUMPTIVE USE The Colby domestic water was used until April 1987 when water was shut off to the site. Less than 1,000 gallons per month were used between October and April.