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<br />I <br />\,.4j <br />(0 <br />c: <br />.- <br /> <br />.,c'...: <br />".-! <br /> <br />The King well was drilled to a depth of 155 feet <br />and completed with 6-inch steel casing perforated in <br />the Dakota. The static water level is 21 feet belcw <br />the land surface. The well was tested by pumping at <br />a constant discharge of 15 gpm for 200 minutes: total <br />drawdown was 5 feeL (See fig. 5.) <br /> <br />Water fr~~ the King well (table 1) exceeds the <br />desired limi~ of 500 ppm (parts per million) of <br />dissolved solids but is within the acceptable limit <br />of 1,000 ppm. The fluoride content is slightly in <br />excess of the recommended limit of 1.7 ppm. The iron <br />content, determined by testing in the field, ranges <br />from 3 to 4 ppm (recommended limit, 0.3 ppm). The <br />taste of the water is unpleasant. Although these <br />concentrations do not greatly exceed recommended <br />standards for drinking water set by the U.S. Public <br />Health Service, the iron content and the taste may be <br />serious nuisances. <br /> <br />The Mancos Shale has an erosional surface that <br />rises eastward. Because the formation dips eastward, <br />the Mancos resembles a wedge that thickens to the <br />east. (See fig. 4.) Near the eastern edge of the <br />reservoir site it is about 250 feet thick. Ge:1erally, <br />the Mancos is a relatively impervious gray to black <br />shale, which may contain thin beds of limestone and <br />shaly sandstone at the study site. It commonly <br />weathers to a buff color. The Mancos in the reservoir <br />area is overlain by relatively thin slope-wash deposits, <br />mostly its own weathered material. <br /> <br />Alluvium of Iron Creek ranges in thickness from a <br />few to more than 60 feet, as indicated by test-hole <br />logs. The alluvium is predominantly clay interbedded <br />with fine sand. However, some test holes penetrated <br />more than 20 feet of saturated material, ranging in <br />grain size from gravel to boulders. The chemical <br />quality of water in thea1luvium probably approximates <br />that of the surface water, which contains excessive <br />amounts of dissolved solids for drinking water. <br /> <br />11 U.S. Public Health Service, 1962, Drinking <br />water standards: Federal Register, Mar. 6, 1962, <br />p. 2152-2155. <br /> <br />" <br />