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1 <br /> GROUND WATER MONITORING <br /> Bedrock <br /> Water Levels - Two wells in the Wadge Overburden (which includes the Wadge <br /> Coal) are monitored. Water Levels in the wells have been measured since <br /> 1979 (Figures 4 and 5). The two wells seems to indicate some impact on <br /> water levels from mining. The water levels have been rising from 1980 to <br /> ' 1985. This is probably due to cessation of mining in the vicinity of the <br /> wells in 1979 or 1980. Due to the wells proximity to Foidel Creek, the <br /> trend may be the result of a long-term climatological trend. The data <br /> indicates that the water levels in the Wadge overburden varies seasonally: <br /> the water levels in the spring are usually higher than in the fall . <br /> Water Quality - The water quality data for the Wadge Overburden wells is <br /> summarized on Tables 4 through 7. A plot of dissolved solids is presented <br /> on Figure 6. The baseline dissolved solids level is approximately 1000 <br /> mg/l . There is insufficient data to indicate whether this level , which is <br /> significantly higher than background levels in other areas of Twentymile <br /> park is due to natural causes or is related to mining. The dissolved solids <br /> concentration in Well 008-77-58 is not increasing. The dissolved solids <br /> ' concentration in Well 008-79-6 increased at the end of 1988 but has <br /> decreased since then. Other than one relatively high mercury value, the <br /> data does not indicate any significant changes in the trace metals <br /> ' concentrations. The high mercury concentration for Well 008-77-58 was well <br /> below previous maximum concentrations. <br /> Alluvium <br /> ' Alluvium at the Foidel and Middle Creek confluence are monitored. Two <br /> alluvial wells completed in the Foidel Creek alluvium are monitored. <br /> Water Levels - The plot of the historic water levels in the two Foidel Creek <br /> Alluvial wells and Foidel Creek is presented on Figure 7. The water levels <br /> in the wells and stream show the typical seasonal pattern, of relatively <br /> rapid increase and decline due to spring runoff. While the seasonal <br /> variation in water levels is readily apparent, no impact from the mining is <br /> evident. <br /> - 3 - <br />