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REP09078
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REP09078
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Entry Properties
Last modified
8/24/2016 11:38:48 PM
Creation date
11/27/2007 12:02:47 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Report
Doc Date
2/28/2003
Doc Name
2002 Annual Hydrology Report Letter & Report
From
Seneca Coal Company
To
DMG
Annual Report Year
2002
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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• monitoring requirement was discontinued in 1993 (although field <br /> parameters were occasionally collected in 1994 to 1997). A statistical <br /> summary of baseline chemistry data is provided in Appendix D1. Its TDS <br /> plot indicates an increasing trend. <br />Creek / Annand Draw <br />- NPDESI0. This sediment pond on Annand Draw was completed in August <br />1996. Flow was observed at this site for the first time ever on February <br />24, 1997. Average flow this year was 0.078 cfs, which is 47$ of its <br />historic (1997-2002) value, 0.166 cfs. Baseline data for this site, both <br />downstream (Site YSA9) and upstream (Site YSAF4) of the pond, have been <br />provided in Appendix D1. NPDESIO exhibits an increasing TDS trend. Due <br />to a high sediment level, this pond was dredged out in August and <br />September 2002. <br />- NPDESII. This pond exists on a Grassy Creek tributary and was <br />• completed in October 1997. Flow was first observed at this site in 1998. <br />No discharge occurred in 1999 or 2000. This year's average flow, 0.0055 <br />cfs, is 35$ on its historic (1998-2002) value, 0.0158 cfs, TDS values <br />exhibit an increasing trend. <br />- Site YSGFS. This site exists on Grassy Creek below the NPDESII pond. <br />Its hydrograph indicates the lowest peak flow since 1992 occurred this <br />year. A statistical summary of baseline chemistry data is provided in <br />Appendix D1. Its TDS plot indicates an increasing trend. <br />- Site YSGS. This site exists on Grassy Creek below all discharges from <br />both the Yoast and Seneca II Mines. It became part of the required <br />monitoring program in October 1995. TDS values here are affected more by <br />the Seneca II Mine than the Yoast Mine. Its TDS plot indicates an <br />increasing trend. <br />11 <br />
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