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Section 779.15(a) Continued. <br />• <br />Revised 11/20/80 <br />limited domestic use. The results of analyses listed ~n Table 6, <br />Kerr Mine Area Ground Water Quality Data, shows that in general, <br />ground water is alkaline, saline, and sufficiently high in hardness <br />and sulfate content to restrict usage primarily to stock watering. <br />Tipple Area <br />The only aquifer in the tipple area is the stream-laid alluvium de- <br />posited by the Illinois River. The horizontal extent of the al- <br />luvium is shown within the lines delineating the "unconsolidated <br />stream-laid deposits holding streams" on Map 17a, Kerr Tipple Area <br />Hydrology. The tipple facilities are constructed on fill built <br />over the alluvium. The alluvium of the Illinois River is typical <br />of stream-laid deposits in North Park, described as sand and gravel <br />in a matrix of silt and clay, with a thickness of less than 25 feet <br />(Voegeli, 1965). <br />r <br />-J <br />The water table in the marsh surrounding the tipple is above ground <br />for most of the year. Four alluvial wells have been installed and <br />monitored in the tipple area. Based on water levels from October, <br />1980, which are listed in Table 8a, Kerr Mine Area Ground Water <br />Level Data, water table contours have been drawn on Map 17a, Kerr <br />Tipple Area Hydrology. The water table elevations shown represent <br />the lowest level of the water table in the fall. As shown by the <br />slope of the water table contours, flow in the alluvium is toward <br />the Illinois River where the perennial stream receives water from <br />bank storage during dry months. <br />There is only one known use of ground water in the tipple area. A <br />well installed by Kerr Coal at the Kerr Tipple operates under <br />Colorado Well Permit No. 23696-F. This well, as shown on Map 17a, <br />779-33 as <br />