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• <br />2.04.5(1)(b) <br />Creek) were well below known toxic levels. <br />Turbidity is low in the North Fork of the Gunnison River at <br />Somerset, in part because of the settling which takes place <br />in Paonia Reservoir.. This reservoir may also function as a <br />buffer for fluctuations in other chemical constituents. <br />Total dissolved solids increases downstream on the North Fork <br />of the Gunnison River. Between Paonia Reservoir and Paonia, <br />TDS varies between 100-250 milligrams/liter and increases to <br />500-1,000 milligrams/liter at Hotchkiss (Price and Waddell, 1973). <br />Downstream water quality is influenced by several natural and <br />man-induced factors. Solute concentration naturally tends to ' <br />increase farther downstream, largely because the stream flows <br />through a marine shale valley. In addition, the TL`S is raised <br />• in the North Fork Valley by irrigation return flow. Water <br />quality of the North Fork is also affected by municipal wastes <br />from the towns of Paonia, Somerset and Hotchkiss. <br />• <br />Ground Water System. In Gunnison and Delta Counties very little <br />information exists about actual depth of ground water except <br />along perennial streams (Price and Arrow, 1974). Similarly, <br />flow rates from non streambed aquifer wells are also unY.nown. <br />Altantic Richfield Company has initiated an extensive investigation <br />of the area encompassed by their coal lease. Excerps from <br />data presented by ARCO for thier lease is included herein. The dares <br />is primarily for the F-seam, but it is the only data available <br />and is so presented. <br />5-3 <br />