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REP48470
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REP48470
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Entry Properties
Last modified
8/25/2016 12:52:11 AM
Creation date
11/27/2007 12:20:07 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
10/7/1991
Doc Name
1990 AHR Review
From
DMG
To
Twentymile Coal Company
Annual Report Year
1990
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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<br />Surface Water <br />1. There are no water level readings for site 304 on April, May, July, and <br />September. Please explain. <br />2. Site 800 has only 11 samples instead of the required 12. Please explain <br />3. Site 8 is missing one measurement for field parameters. Please explain <br />Discharge and Pond Sites <br />1. All requirements ~dere met <br />S rin s <br />1. All requirements were met. <br />Water Quality Analysis <br />Bedrock Wells <br />The Statement is made "the data for well 006-83-48C does indicate that the <br />water quality has been affected by migration of fluids r'rom the cemented zone <br />of the well into the open area of the well". Please provide the evidence that <br />led you to this conclusion. The predicted hydrologic impact on the Trout <br />Creek sandstone aquifer is "no impact"; however, it does not appear the <br />existing Trout Creek wells are appropriately monitored to determine impact, if <br />any. If the well is indeed contaminated, a new well needs to be installed. <br />Please submit a minor revision to install a new Trout Creek well and to change <br />the monitoring requirements for that welt to semi-annual level and field <br />parameters as well as semi-annual full suite quality measurements. (the same <br />requirements as well 001-83-106). <br />Alluvial Wells <br />Fish Creek <br />As mentioned in the Eckman Park AHR review, there is some evidence of overall <br />better quality higher in the drainage. Well 008-AW-3 appears to be influenced <br />by the outflow of Tipple Pond E; however, a general downward trend in field <br />conductivity is noted (Figure 23). <br />Foidel Creek <br />The underground mine discharge and Pond D discharge appear to contribute to <br />the marked change in field conductivity noted in the Foidel Creek alluvial <br />wells (Figure 22) in July of 1986. It is also apparent that the conductivity <br />of the mine discharge itself changed significantly at that time. The field <br />conductivity appears to be relatively stable at its current level and no <br />undesirable level of heavy metals is noted. Please offer your comments <br />related to the conductivity changes noted at the Foidel Creek alluvial wells <br />and for the underground mine discharge. <br />
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