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• <br />ROATCAP CREEK <br />COLLWIAL WELLS <br />Five colluvial wells are completed in Roatcap Creek colluvium in <br />the drainage bottom. An additional colluvial well is completed in <br />the colluvium/fill above the Orchard Valley West Mine portal. <br />Plots of the water levels are presented in Figures 22 through 26 <br />and Figure 54 and a plot of the field conductivity is presented in <br />Figure 27. Summaries of the of the water quality data for the five <br />wells in the drainage bottoms are presented in Tables 42 through <br />51. <br />• All of the wells are in the East Roatcap Creek watershed. The <br />wells show a general trend of increasing conductivity from upstream <br />to downstream. Water quality in well SM-7 located furthest <br />upstream is a calcium bicarbonate type with TDS of about 175 mg/1. <br />Sodium and sulfate composition as well as TDS concentrations <br />increase progressively in wells located downstream. <br />The water levels follow a trend similar to the Stevens Gulch <br />colluvial wells. Levels appear to have stabilized in 1991 <br />following a decline due to the low runoff in 1988 through 1990. <br />The water levels show considerable seasonal variability with <br />seasonal fluctuations from 1 to 7 feet. Like other shallow wells, <br />the seasonal levels fall during the late summer and rise during the <br />winter and spring. No anomalies or impacts on water levels or <br />water quality were observed in 1991 at these wells. <br />8 <br />