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2000 = 0.320 cfs . <br />1999 = 0.483 cfs (weekly measurements) <br />1998 = 1.209 cfs " <br />1997 = 1.242 cfs " <br />1996 = 1.400 cfs " <br />1995 = 0.386 cfs " <br />1994 = 0.114 cfs " <br />1993 = 0.602 cfs " <br />1992 = 0.072 cfs " <br />1991 = 0.072 cfs " <br />1990 = 0.076 cfs " <br />1989 = 0.181 cfs " <br />1988 = 0.055 cfs " <br />1987 = 0.070 cfs " <br />1986 = 0.568 cfs " <br />1985CY (Calendar Year) = 1.172 cfs " <br />1964CY = 1.439 cfs " <br />1983CY = 0.531 cfs " • <br />1982CY = 0.547 cfs " <br />1981CY = 0.098 cfs " <br />1980CY = 0.990 cfs " <br />This year's average flow value, 0.997 cfs, is 179& of the historic <br />(1980-2006) average flow value, 0.557 cfs. Flow values at this site are <br />affected by the pumping of water from this pond for the truck wash <br />system and for water trucks (dust control). Pumping for the truck wash <br />system began on September 18, 1984. Also, the upper end of this pond was <br />regraded in 2002. Review of the TDS plot indicates an increasing trend. <br />Grassy Creek Drainage. Four monitoring sites lie within the Grassy <br />Creek drainage: Site 1, located upstream on Grassy Creek; NPDES <br />Discharge Point 003, also known as the Shop Reservoir or the Northwest <br />Impoundment, located just north of the mine shop area; Site 2, located <br />approximately 0.1 mile downstream of where NPDES 003 discharges into <br />Grassy Creek; and Site 3, which monitors discharges from pre-SMCRA <br />mining areas and is located adjacent to Site 2. <br />16 <br />