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Hubberson Gulch / Dry Creek <br />- Surface Water Site SW-S2W-SG9 (WSH9) This Hubberson Gulch site is <br />upstream of NPDESI7 and all other mine related discharges in the II-W <br />South Expansion area. Monitoring at this site began in August 1997. No <br />monitoring was performed in the 1999 calendar year, but was resumed in <br />2000. This site is monitored in June and September. <br />- NPDES 017 (NPDESI7). This site exists on Hubberson Gulch in the II-W <br />South Expansion area. Construction of Pond 017 began on October 14, 2002 <br />and was completed in December 2002. This year, no flow occurred in <br />October 2005. After spring runoff, discharge at this site stopped by <br />August 9, but started again on September 19. It is monitored weekly, <br />except when inaccessible by truck. Average flow for each water year was: <br />2007 0.163 cfs <br />2006 0.162 cfs <br />2005 0.119 cfs <br />2004 0.080 cfs <br />2003 0.187 cfs <br />Average historic flow is 0.139 cfs. TDS values at this site are <br />increasing. Baseline data from Site SW-S2W-SG17 (WSH17) has been <br />provided in Appendix E1. <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 monitored weekly, except when <br />inaccessible by truck. The average flow each water year was: <br />2007 0.081 cfs <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 />Average historic flow is 0.057 cfs. Mine pit pumping into this pond is <br />responsible for many of the high peaks present on the hydrograph in <br />13 <br />