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REP17921
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REP17921
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Entry Properties
Last modified
8/24/2016 11:46:52 PM
Creation date
11/27/2007 2:16:03 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980005
IBM Index Class Name
REPORT
Doc Date
2/23/2007
Doc Name
2006 Annual Hydrology Report
From
Seneca Coal Company
To
DRMS
Annual Report Year
2006
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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Fish Creek during the months of June and July due to discharges from the <br />Seneca II Mine. In June, an increase from 421 to 497 mg/1 (18~) is <br />predicted between SSFll and SSF13. In July, an increase from 533 to 607 <br />mg/1 (13 g) is predicted between SSF11 and SSF13. Neither lower Bond <br />Creek nor lower Cow Camp Creek was flowing in July this year. As stated <br />in the previous paragraph, a 13~ increase in TDS was observed between <br />the two sites in May, and a So increase was observed in June. It <br />appears that the Seneca II Mine has little impact on Fish Creek. Water <br />discharged from the mine is lost to stock ponds, evapotranspiration, and <br />the alluvium as it flows through Twentymile Park. Dissolved solids from <br />mine discharges are diluted during the snowmelt runoff in March and <br />April (prior to the irrigation season) by high stream flows with <br />relatively low TDS concentrations. The natural conditions in Twentymile <br />Park appear to have a much greater impact on the water quality of Fish <br />Creek. <br /> Little Grassy Creek Drainage. Two monitoring sites lie within the <br />• Little Grassy Creek drainage: Site 5, located in the southwest portion <br /> of the permit area and NPDES Discharge Point 002, also known as the <br /> Wadge Impoundment. <br /> <br />- Surface Water Site SW-S2-5 (SSLGS). Site 5 drains the upper reaches <br />of Little Grassy Creek which are undisturbed by mining. A comparison of <br />its hydrograph to that of NPDES 002 indicates that Site 5 is a <br />relatively minor contributor to the flow in this basin. <br />- NPDES Discharge Point 002 (NPDES2). Hydrographs are presented in <br />Appendix D. The hydrographs consist of two pages, the first is for data <br />this year, and the second shows all historical data. The following <br />table lists the average flow values for each water year. <br />2006 = 0.997 cfs (monthly measurements) <br />2005 = 0.356 cfs " <br />2004 = 0.283 cfs " <br />2003 = 0.323 cfs " <br />2002 = 0.245 cfs " <br />2001 = 0.374 cfs " <br />15 <br />
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