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PERMFILE69589
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PERMFILE69589
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Last modified
8/24/2016 11:18:28 PM
Creation date
11/20/2007 10:57:51 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
11/23/2005
Section_Exhibit Name
2.04.7 Hydrology Information
Media Type
D
Archive
Yes
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• The well and spring measurements averaged about 1100 mmhos, ranging from 5~0 mmhos <br />from a well on Wilson Creek to 1880 at a seep from a coal seam exposed at the pit. The <br />groundwater quality was again found to be highly variable in terms of specific conductance. <br />The measurements made in 1979 were within the range of variation seen in measurements <br />taken in 1974 and 1975 at the same sites. This report has been previously submitted on <br />February 5, 1981 and is included in Exhibit 7. <br />The conclusion presented in the 1979 LRCWE report was that there is no evidence of <br />contamination of the groundwater by the surface mining of Colowyo. Analysis of specific <br />conductance measurements below sites where contamination would be expected, such as <br />Goodspring Creek below Streeter Canyon and Taylor Creek below the coalloadout area, do <br />not reveal decreased water quality. Monitoring of Goodspring Creek and Taylor Creek since <br />1979 supports the conclusions of the 1979 LRC WE report. <br />Tables 3 and 4 present the analyses of water samples collected from Taylor Creel< Well Nos. <br />1 and 3, respectively. The locations of the two Taylor Creek wells and their characteristics <br />are discussed more fully in the earlier groundwater description. Water samples from the two <br />wells were analyzed for the common ions and trace metals because water from the two wells <br />is used for domestic purposes on the mine site. Comparison of the observed concentrations <br />and the health limits shows that trace metals from the water in deep sandstone's are not a <br />problem. <br />Groundwater quality in and adjacent to the permit area is generally poor. Water from the <br />• wells contains relatively high amounts of dissolved salts and calcium-carbonate hardness. <br />Previous analyses of groundwater samples in the area indicate that the groundwater is <br />alkaline, saline, and sufficiently hard to restrict usage to stock watering. <br />J <br />2.04.7-19 <br />
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