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,' 1999) flow value, 0.129 cfs. Mine pit pumpage sometimes has a major <br /> impact on £ 1 ow values. A statistical summary of baseline chemistry data <br /> from Site YSSF2 (Y1 outflow) and YSS3 (Y1 inflow) is provided in <br /> Appendix D1 . NPDE512 exhibits an increasing TDS trend. <br />- NPDESI3. Construction of this pond was completed in December 2003. No <br />discharge has occurred yet. <br />- NPDE514. 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 />•~ Grassy 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 0.071 cfs, which is 45~ of its <br />historic (1997-2004) value, 0.159 cfs. This pond was dredged out in <br />2002. saseline data for this site, both downstream (Site YSA4) and <br />upstream (Site YSAF4) of the pond, have been provided in Appendix D1. <br />NPDESIO exhibits an increasing TDS trend. <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, 0.035 <br />cfs, is 94~ above its historic (1998-2004) value, 0.018 cfs. This year's <br />average £low is biased high by a record high discharge value observed in <br />March (due to snowpack runoff). The average flow value for the period of <br />.I April to September of this year was 0.008 cfs, which is 388 of the <br />historic average for that same period (0.021 cfs). This year, this pond <br />11 <br />