Laserfiche WebLink
State Reg. <br />2.04.7(IXa) Present uses of ground water in the region are limited to domestic and <br />(iii) stock watering supply. Table 7-2 gives estimated ground water usage in <br />the upper Colorado Basin showing that surface water is the main source <br />of water. The locations of all private wells within none-mile radius of <br />the permit area are presented on Exhibit 7-I. There are no known users <br />of ground water for irrigation in a one mile radius of the area. A list of <br />registered ground water permits are given in the Water Rights portion of <br />this section. <br />Ground water quality within the general area appears to vary consider- <br />ably from aquifer to aquifer, and may vary significantly within the same <br />aquifer. Regional study by Brogden and Giles (1977) tends to demon- <br />strate this fact. They report that the quality of ground water in the <br />region is considered to be poor for domestic use and may contain excess <br />concentrations of sulfate, fluoride, iron, manganese, selenium, total <br />dissolved solids, and hardness. Excess concentrations of arsenic and <br />nitrate may occur in alluvial aquifers in addition to the above constitu- <br />ents. A summary of their report is given in Table 7-I. <br />Water quality information from wells monitoring undisturbed areas <br />adjacent to the Seneca II permit have been compiled by Seneca Coals, <br />Ltd. and the U.S. Geological Survey to further document ground water <br />quality in the Williams Fork Formation. Exhibit 7-I shows the location <br />of these well sites in relationship to the Seneca II permit. Additional <br />information on ground water quality in the general area is derived from <br />the Energy Fuels No. I Mine Permit Application (1979). <br />Figure 7-I is a trilinear (Piper) diagram which has been constructed using <br />the methods outlined by Hem (1970) to show the concentrations of major <br />ions in solution expressed in milliequivalents per liter (meq/I). Basically, <br />these plots show that ground water in adjacent areas west of the <br />Seneca 11 permit is slightly saline, with calcium, magnesium, sulfate, and <br />bicarbonate as the dominant soluble ions. Complete chemical analyses <br />II • for these wells, as listed in Table 7-3, further show that concentrations <br />of iron, manganese, ammonia, total dissolved solids, hardness, sulfate, <br />and pH may exceed the drinking water standards given in Table 7-4. <br />7-5 Revised 5/27181 ' <br />