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• <br /> <br />The massive Twentymile and Trout Creek sandstones con- <br />stitute the most significant water bearing strata in the general <br />area. .Interbedded smaller sandstones and coal strata constitute <br />a less significant water resource throughout the area. Alluvium <br />of the Yampa River and Williams Fork provides locally variable <br />quantities of water. <br />The water in the principal streams of the Yampa River <br />basin is suitable for roost domestic and agricultural uses. Very <br />few of the perennial streams at any given time contain water <br />whose concentrations of constituents exceed the maximum ac- <br />cepted limits for domestic use (USGS-1965) . The waters of the <br />emphemeral streams of the adjacent area are typically of a mixed <br />sulfate or sodium-magnesium-sulfate types and are high in total <br />dissolved solids. Their suspended and dissolved solids concen- <br />trations vary directly and indirectly respectively with stream <br />flow. <br />I Quality of ground water from the marine shales of the <br />adjacent areas is poor. Median total dissolved solids concen- <br />tration for the Lewis Shale and Mesaverde Group which outcrop <br />throughout the adjacent area are 4002 mg/1 and 1000 mg/1, <br />respectively. <br />The Response to part 2.04.7 provides more detail regarding <br />water resources within the permit, adjacent and general area. <br />• <br />