Laserfiche WebLink
1992 = 0.072 cfs " <br />1991 = 0.072 cfs to <br />1990 = 0.076 cfs " <br />1989 = 0.181 cfs to <br />1988 = 0.055 cfs " <br />1987 = 0.070 cfs " <br />1986 = 0.568 cfs " <br />1985CY (Calendar Year) = 1.172 cfs to <br />1984CY = 1.439 cfs to <br />1983CY = 0.531 cfs " <br />1982CY = 0.547 cfs " <br />1981CY = 0.098 cfs " <br />1980CY = 0.990 cfs " <br />• <br />This year's average flow value, 1.112 cfs, is 99% above the historic <br />(1980-2008) average flow value, 0.560 cfs. Flow values at this site <br />were 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 />- Surface Water Site SW-S2-1 (SSG1). This site monitors Grassy Creek <br />upstream of mining at the Seneca II Mine. Review of the TDS plot <br />indicates a slightly increasing trend. <br />- NPDES Discharge Point 003 (NPDES3). Hydrographs presented in Appendix <br />D show that flow has increased at this site since September 18, 1984, <br />when operation of the truck wash system began. water is siphoned from <br />14