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REP29759
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REP29759
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Entry Properties
Last modified
8/25/2016 12:00:13 AM
Creation date
11/27/2007 5:26:54 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
10/7/1991
Doc Name
REVIEW ANNUAL HYDROLOGIC REPORT 1990 WATER YEAR C-82-056
From
MLRD
To
TWENTYMILE COAL CO
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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<br /> <br />Surface Water <br />Sites 800 and 8 show somewhat elevated values with regards to conductivity <br />and/or dissolved solids and/or sulfate; however, none are at levels of <br />concern. Site 301 is a good quality site which receives little to no runoff <br />associated with CYCC mining activities. High Spring values for iron are <br />noted at site 1002 and to a lesser degree at site 69; however, both sites <br />receive the majority of TCC surface water flow and neither shows any trend <br />towards material damage at this time. <br />Spring and Pond Discharge <br />High conductivity, TDS, sulfate, and manganese is noted in the measurements <br />frcm the Fish Creek Tipple springs; however, due to the low flow from these <br />springs, no impact to Fish Creek is apparent. High EC and dissolved solids <br />are noted to Pond D and Tipple Pond E. With the exception of Spring runoff, <br />pond outflow is minimal and no impact is apparent. <br />Mine Inflow/Outflow <br />Water quality measurements of mine discharge water are similar to that of <br />Wadge Overburden historical values. This would support the C'fCC conclusion <br />that mine inflow is impacted by the Wadge Overburden. The relatively small <br />amount of mine discharge (approx .15 cfs) is consistent with the low <br />transmissivity of the Wadge Overburden aquifer. No significant impact is <br />noted as a result of the underground mine discharge. <br />Conclusion <br />The Division feels that at the present time no evidence of material damage is <br />present and no emerging trend toward material damage can be identified. <br />However, we do have concerns about CYCC's ability to accurately monitor the <br />Trout Creek Sandstone aquifer particularly with regards to water quality. <br />Overall, the Division notes a high degree of diligence on CYCC's behalf <br />adhering to their monitoring program. <br />Sincerely, <br />~F~I~~ U/~L-GCv~~- <br />Kent A. Gorham <br />Reclamation Specialist <br />KAG/lac <br />8659E <br />
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