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and first discharged in April 2001. It is now monitored monthly. Average <br />flow values for each water year are: <br />2010 0.104 cfs (monthly measurements) <br />2009 0.102 cfs (monthly measurements) <br />2008 0.141 cfs (monthly measurements) <br />2007 0.081 cfs (weekly measurements) <br />2006 0.103 cfs of <br />2005 0.044 cfs if <br />2004 0.037 cfs it <br />2003 0.090 cfs it <br />2002 0.037 cfs it <br />2001 0.019 cfs if <br />This year's average flow was 54% greater than the average historic flow, <br />0.066 cfs. The timing of when flow values are collected affects these <br />averages. Mine pit pumping into this pond was responsible for many of <br />the high peaks present on the hydrograph in previous years. An upper <br />pond, 016A, was constructed in 2004. TDS values at this site are <br />• decreasing. Baseline data from Site SW-S2W-SG16 (WSH16) has been <br />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. Monitoring at this site was temporarily <br />suspended, as permitted in TR 69, in May 2010. Only the April 2010 data <br />is included in Appendix E. <br />- NPDES 006 (NPDES6). This site is located on a tributary to Hubberson <br />Gulch referred to as the 006 Gulch. Construction of the 006 Pond was <br />completed October 1989. This pond collects all mine discharges from the <br />central mining area. The first hydrograph supplied shows data for this <br />year; the second shows all data collected since the site began <br />discharging. Review of the flow hydrographs indicates typical seasonal <br />variation du.e to snowmelt runoff in the spring, with additional peaks <br />due to pit pumpage, pond clean-out, and rainfall events. Average flow <br />values for each water year are: <br />13