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REP50650
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REP50650
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Last modified
8/25/2016 12:55:34 AM
Creation date
11/27/2007 12:54:43 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981018
IBM Index Class Name
Report
Doc Date
3/15/1999
Doc Name
1998 AHR
Annual Report Year
1998
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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<br />' the general increase in the average TDS that started when Kenney Reservoir was filled was <br />beginning to slow down. Based on the data collected during the present water year, the TDS <br />' ranged from 3750 mg/I to 4000 mg/I with an average of 3875mg/I. This compares to an <br />average during the previous reporting period of 4750 mg/t. A graph showing the magnesium, <br />chloride and TDS levels for QAL-5 is also included in Appendix E. <br />The water quality of the White River is considerably better than that in the alluvium indicating <br />' that permeability in the alluvium is restricted resulting in a relatively low degree of <br />communication between the river water and the water in the alluvium. The existence of Kenney <br />' Reservoir decreases the groundwater gradient which may inhibit any natural tendency for the <br />alluvium to flush itself of the higher dissolved solids content. The potential effects, therefore, <br />were projected that the dissolved solids of the White River alluvium in the vicinity of Scullion <br />Gulch would continue to increase to a higher level and stabilize on an average basis. There is a <br />16% decrease in the TDS during this water year compared to the previous year (average 4008 <br />mg/I vs. 4750 mg/I). <br />2.2.1.3 Bedrock Water Level Data Hydrographs for the 26 bedrock monitoring holes are <br />contained in Appendix D. Table 2-2 contains a statistical summary of the water level data <br />from the monitoring holes. The locations of the holes are shown on Plate 1 in the pocket of <br />this report. As noted in the original Deserado Mine permit application, the three zones being <br />monitored (upper sandstone facies, siltstone and coal facies, and the lower sandstone) <br />identify three different stratigraphic zones which lack the characteristics of typical aquifers. <br />The strata are tight as demonstrated by pumping tests. <br />' The "upper sandstone facies" hydrographs, designated by the hole name ending in "U" are <br />water level depths in feet over time. <br />Monitor holes 2-7U and TW2-7U are located on the same location. Although the water levels <br />in the two holes have been comparable, fluctuations and trends in each hole have in the past <br />' been quite dissimilar. A longwall gateroad (4th East) was developed past this location in June <br />1988. No holes were encountered, however, there was wet ground in the area after mining. <br />The area later dried. Longwall panel 3 was mined past this location in April 1990. The next <br />TW2-7U reading after that (6/21/90) showed a water level drop of almost 80 feet. The <br />readings between 10/29/91 and 7/21/94 showed a water depth of more than 300 feet (beyond <br />' the depth measuring capacity). The water level in 2-7U eventually showed a drop similar to, <br />though of much smaller magnitude, that shown by TW2-7U. After the drop, both holes <br />exhibited a rising trend. Longwall panel 4 was mined past the location in August 1991, with <br />no apparent immediate response from either hole. During this monitoring period both holes <br />were found to have a dry obstruction, 2-7U at 127 feet and TW2-7U at 157 feet. Ground <br />6 <br /> <br />
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