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upstream mining pit. A statistical summary of baseline chemistry data <br />from Site YSSF2 (Y1 outflow) and YSS3 (Yl inflow) is provided in <br />Appendix D1. NPDESI2 exhibits an increasing TDS trend. <br />- NPDESI3. Construction of this pond was completed in December 2003. It <br />first began discharging on March 14, 2005. More data will be needed to <br />determine the TDS trend. <br />- NPDESI4. Construction of this pond was completed in September 2001. <br />No discharge has occurred yet. <br />- Site YSS2. This site exists on Sage Creek below all potential Yoast <br />Mine discharges. Monitoring at this site was resumed in 1998 after the <br />monitoring requirement was discontinued in 1993 (although field <br />parameters were occasionally collected in 1994 to 1997). A statistical <br />summary of baseline chemistry data is provided in Appendix D1. Its TDS <br />plot indicates an increasing trend. <br /> <br />Creek / Annand Draw <br />- NPDESI0. This sediment pond on Annand Draw was completed in August <br />1996. Flow was observed at this site for the first time ever on February <br />24, 1997. Average flow this year was 0.188 cfs, which is 1178 of its <br />historic (1997-2005) average, 0.161 cfs. This pond was dredged out in <br />2002. Baseline data for this site, both downstream (Site YSA4) and <br />upstream (Site YSAF4) of the pond, have been provided in Appendix D1. <br />NPDESIO recently exhibits a decreasing TDS trend (SF=0.5). <br />- NPDESII. This pond exists on a Grassy Creek tributary and was <br />completed in October 1997. Flow was first observed at this site in 1998. <br />No discharge occurred in 1999 or 2000. This year's average flow, 0.014 <br />cfs, is 82~ of its historic (1998-2004) average, 0.017 cfs. This year, <br />this pond stopped flowing in July. Due to high sediment level, this pond <br />was dredged out in the fall of 2003. TDS values recently exhibit a <br />decreasing trend (SF=0.5) <br />11 <br />