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occurred in July. Average flow this year was 0.0133 cfs, which was 40% <br />greater than the historic (2005 -2011) average value, 0.0095 cfs. The <br />timing of when flow values are collected affects these averages. The TDS <br />trend is increasing. <br />- NPDESI4. Construction of this pond was completed in September 2001. <br />It discharged for the first time on April 4, 2006. This year, this pond <br />started flowing in April and stopped flowing in August. The average flow <br />this year was 0.0330 cfs, which was 79% greater than the historic (2006- <br />2011) average value, 0.0184 cfs. The timing of when flow values are <br />collected affects these averages. TDS values are increasing. <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 Dl of the <br />2010 AHR. Its TDS plot indicates a slightly increasing trend, with the <br />peak value occurring in September 2006. <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. Flow at this pond is normally continuous. Average flow this <br />year was 0.3654 cfs, which is 120% above its historic (1997 -2011) <br />average, 0.1661 cfs. The timing of when flow values are collected <br />affects these averages. This pond was dredged out in 2002. Baseline data <br />for this site, both downstream (Site YSA4) and upstream (Site YSAF4) of <br />the pond, have been provided in Appendix D1 of the 2010 AHR. NPDES10 <br />exhibits a slightly increasing TDS trend. However the peak value <br />occurred in 2002. <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, this pond started <br />9 <br />