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GROUND WATER <br />The piezometers on the mine bench were monitored quarterly for <br />water level. Graphs are included with this report which show <br />historical water levels of the piezometers. The water level in <br />P-1 peaked in March 1988 about the same time the superficial <br />slump was found on the bench cover material. Since March the <br />water level in P-1 has dropped 11.4 feet. During the last two <br />years P-1 has shown wide seasonal variations with the peak water <br />level occurring in March and the low water level occurring in <br />Deoember. <br />The piezometer at the top of the bench, P-4, showed little varia- <br />tion during the year. Its water level has increased 2.3 feet <br />since December 1987. <br />Piezometer P-3 showed a peak water level in March then it vir- <br />tually dried up by December. This same seasonal variation also <br />occurred during 1987 but it was not quite as pronounced. <br />Piezometer P-2 showed little variation and little water which is <br />consistent with prior years records for this piezometer. <br />The north underdrain had more flow during 1988 than 1987. The <br />north underdrain's flow increased from 0.06 to 0.10 acre-feet. <br />The south underdrain's total flow decreased from 0.70 to 0.27 <br />acre-feet. The mass average conductivity for both underdrains <br />was lower than Last year. These averages for 1988 were 2304 and <br />4486 compared to 1987's 2385 and 4638 for the north and south <br />underdrain respectively. The conductivity is measured in <br />umhos/cm. These differences in flow calculations and conductivity <br />measurements may be influenced by the quarterly monitoring <br />frequency performed during 1988 which was the first complete year <br />of quarterly monitoring. <br />MINB WATER <br />The mine was sealed in 1986. No provisions were made for <br />monitoring the water level in the mine once it was sealed, there- <br />fore no mine inflows information was collected in 1988. No mine <br />inflows map for 1988 is being submitted. <br />CONSUMPTIVE USE OF WATER <br />There was no consumptive use of water during the year. <br />HYDROLOGIC IMPACTS <br />The hydrologic impact from the reclaimed <br />The discharge from the pond no. 5 was the <br />into hubbard creek from the mine site and <br />acre-feet for the entire year. <br />mine site is minimal. <br />only direct discharge <br />it only totaled 0.23 <br />-2- <br />