REP14879 - Laserfiche WebLink

Home Browse Search

GROUND WATER MONITORING ' ~ ~ Bedrock ~'~ N J ' ~ D Water Levels - Two wells in the Wadge Overburden (which includes the Wadge Coal) are monitored. Water Leve l ells have been measured since 1979 (Figures 4 and 5). The tw wells seems indicate any impact on water levels from mining. The water Leve s ave been rising from 1980 to 1985. Tliis is probably due to cessation of mining in the vicinity of the well in 1979 or 1980. Due to the wells proximity to Foidel Creek, the trend may be ' the result of a long-term climatological trend. The data indicates that the water levels in the Wadge overburden varies seasonally: the water levels in ' the summer are usually higher than in the winter. Water Quality - The water quality data for the Wadge Overburden wells is summarized on Tables 4 through 7. A plot of dissolved solids is presented on Figure 6. The baseline dissolved solids level is approximately 1000 ' mg/1. There is insufficient data to indicate whether this level, which'is significantly higher than background levels in other areas of Twentymile ' park is due to natural causes or is related to mining. There is sufficient data to indicate that this level is not increasing. Where the dissolved ' solids are elevated the sodium and the SAR are high. The data does not indicate any significant changes i'n the trace metals concentrations. ' Alluvium Sediments at the Foidel and Middle Creek confluence are monitored. Two wells completed in the Foidel Creek alluvium are monitored. ' IJater Levels - The plot of the historic water levels in the two Foidel Creek Alluvial wells is presented on Figure 7. The water levels in the wells show the typical seasonal pattern, of relatively rapid increase and decline due to spring runoff as do the stream water levels. While the seasonal t variation in water levels in the alluvial sediments is readily apparent, no impact from the mining is evident. 1 -2-