REP04318

• Permit No: C1980005
• IBM Index Class Name: Report
• Doc Date: 1/20/2004
• Doc Name: 2003 Annual Hydrology Report to Appendix B
• From: Seneca Coal Company
• To: DMG
• Annual Report Year: 2003
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Little Grassy Creek Drainage. Two monitoring sites lie within the
Little Grassy Creek drainage: Site S, located in the southwest portion
of the permit area and NPDES Discharge Point 002, also known as the
Wadge Impoundment.
- Surface Water Site SW-52-5 (SSLGS). Site 5 drains the upper reaches
of Little Grassy Creek which are undisturbed by mining. A comparison of
its hydrograph to that of NPDES 002 indicates that Site 5 is a
relatively minor contributor to the flow in this basin.
- NPDES Discharge Point 002 (NPDES2). Hydrographs are presented in
Appendix D. The hydrographs consist of two pages, the first is for data
this year, and the second shows all historical data. The following
table lists the average flow values for each water year.
2003 = 0.323 cfs (monthly measurements)
2002 = 0.245 cfs "
2001 = 0.374 cfs "
2000 = 0.320 cfs "
1999 = 0.483 cfs (weekly measurements)
1998 = 1.209 cfs "
1997 = 1.242 cfs "
1996 = 1.400 cfs "
1995 = 0.386 cfs "
1994 0.114 cfs "
1993 = 0.602 cfs "
1992 = 0.072 cfs "
1991 = 0.072 cfs "
1990 = 0.076 cfs "
1989 = 0.181 cfs "
1988 = 0.055 cfs "
1987 = 0.070 cfs "
1986 = 0.568 cfs "
1985CY (Calendar Year) = 1.172 cfs "
1984CY = 1.439 cfs "
1983CY = 0.531 cfs "
1982CY = 0.547 cfs "
L._.J

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