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2005 0.119 cfs <br /> 2004 0.080 cfs <br /> 2003 0.187 cfs <br /> This year's average flow was 68% greater than the average historic <br /> (1990-2008) flow, 0.1 62 cfs. TDS values at this site are increasing. <br /> Baseline da ta from Site SW-S2W-SG17 (WSH17) has been provided in <br /> Appendix E1. <br />• <br />• <br />- NPDES 016 (NPDESI6). This site exists on a Hubberson Gulch tributary <br />in the II-W South area. Pond 016 was nearly complete in September 2000, <br />and first discharged in April 2001. It is now monitored monthly. The <br />average flow each water year was: <br />2008 0.141 cfs (monthly measurements) <br />2007 0.081 cfs (weekly measurements) <br />2006 0.103 cfs " <br />2005 0.044 cfs " <br />2004 0.037 cfs " <br />2003 0.090 cfs " <br />2002 0.037 cfs " <br />2001 0.019 cfs " <br />This year's average flow was 127% greater than the average historic <br />flow, 0.062 cfs. Mine pit pumping into this pond is responsible for <br />many of the high peaks present on the hydrograph in previous years. TDS <br />values at this site are decreasing. Baseline data from Site SW-S2W-SG16 <br />(WSH16) has been provided in Appendix E1. <br />- Surface Water Site SW-S2W-SG7 (WSH7). This site is located on <br />Hubberson Gulch upstream of the confluence of mine discharges contained <br />in the 006 Gulch, but is downstream of Ponds 016 and 017. Monitoring <br />here began in April 1987. Triannual, rather than monthly, monitoring at <br />this site began in June 2005. Its TDS plot indicates an increasing <br />trend. However, the peak TDS occurred in September 2005. Baseline <br />statistics for this site have been provided in Appendix E1. The Seneca <br />II-W PHC, Table 17-42a, predicts an irrigation season (June-September) <br />average TDS value of 1787 mg/l for this site, while a value of 975 mg/l <br />was observed this year. <br />13