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• HYDROLOGY IMPACTS 1989 <br /> GROUNDWATER-EXISTING MONITORING AND IMPACTS <br /> Near Surface Colluvial-Alluvial Groundwater <br /> Springs monitored during 1989 were a continuation of the monitoring <br /> program from the previous years. <br /> Generally, all spring flows were controlled by the amount of <br /> precipitation, sub-sequent percolation and runoff during the year. <br /> Flows of all springs within the permit area were small generally <br /> less than 0. 1 cfs. The aggregate maximum spring flow of all the <br /> springs was less than 0.2 cfs. <br /> Physical and chemical parameters were also a function of the amount <br /> of precipitation and runoff during the year. <br /> No effect on spring flow has been evidenced due to mining. Most <br /> of the resources are greater in depth than 500 feet from the <br /> underground workings. <br /> No shallow monitoring wells were undermined during 1989. Elevation <br /> of water levels and water quality within these wells have changed <br /> • little from the previous few years. In general, as water levels <br /> decrease dissolved solids (conductivity) increases (Fig 3) . The <br /> changes in water level are due to changes in precipitation and <br /> resultant runoff changes. <br /> Bedrock Groundwater <br /> Groundwater depth from the surface was monitored from DH-58 and DH- <br /> 60 during 1989 . DH-58 remained dry through the months that <br /> monitoring was implemented. The water levels in well DH-60 were <br /> within their normal range. <br />