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<br />CJ <br />-J <br />~ <br />-J <br /> <br />Most ground water recharge to the Uinta Basin comes from precipitation on <br /> <br />the Roan Plateau. Water is discharged from springs along Evacuation Creek, <br /> <br />along the White River, and in a few places along the several ephemeral streams <br /> <br />in the area. Other quantities of ground water are discharged to the west. The <br /> <br />aquifer is presently in a steady state condition, with discharge equaling recharge. <br /> <br />Estimates of total water in storage have not been made. <br /> <br />With respect to water quality, total dissolved solids concentrations <br /> <br />range from a high of 4,030 mg/l in the northeast portion of oil shale tracts <br /> <br />U-a and U-b to a low of l,760 mg/l in the southwest portion. Hardness also <br /> <br />varies northeast to southwest from l,OOO mg/l to 69 mg/l. The water is a sodium- <br /> <br />sulfate-bicarbonate type. The high. levels of sulfate and hardness would require <br /> <br />treatment for any industrial application. <br /> <br />The general legal and insititutional considerations applicable to the <br /> <br />Piceance Creek structural basin in Colorado would apply here also. Potential. <br /> <br />disruption of artesian conditions, reductions in surface flows, and reductions <br /> <br />in the discharge of springs would be among the most important of these. <br /> <br />San Juan River Basin, New Mexico. The third location where ground water <br /> <br />may be a significant source of supply (in this case, for coal gasification) is <br /> <br />in the San Juan River Basin in northwestern New Mexico. The geology of bedrock <br /> <br />aquifers in this area is complex. There are over l5 major water-bearing geologic <br /> <br />units in the basin and many minor aquifers. Of the major aquifers, six have the <br /> <br />potential of yielding lOO gpm or more to wells--- the Nacimiento and San Jose <br /> <br />formations, and the Gallup, Cliff House, Dakota, and Entrada sandstones. Estimates <br /> <br />of the total water in storage in these formations are not available. <br /> <br />cxii <br />