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Water enters the alluvial aquifer throughout its area of <br /> outcrop during -the spring snowmelt and through percolation <br /> • from the streams in the upper reaches of Coal Creek during the <br /> remainder of the year. Coal Creek is probably influent in <br /> its upper reaches and effluent in its lower reaches where the <br /> aquifer thins . <br /> Water quality in the upper Coal Basin alluvial aquifer <br /> has been measured by :lid-Continent and by the U.S . Geological <br /> Survey. Water quality information collected by Brogden and <br /> Giles from well No . 9 in the NWk SW4 SW4, Section 1 , T . 10 .S , <br /> R. 89 .W, is summarized on Table 783. 15-4 and plotted on the <br /> trilinear diagram, Figure 783 . 15-4. This shows the water to <br /> be of a Ca Na Mg HCO3 type- with TDS of approximately 347 mg/l . <br /> • Iron and manganese are slightly high for a water to be used <br /> for domestic consumption, however, the water is generally <br /> good quality. <br /> Mid-Continent Resources withdraws water from this aquifer at <br /> -its plant site for use in coal preparation. They are the sole <br /> users of water in the aquifer . <br /> 25 <br /> I,I <br />