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from Site YSSF2 (Y1 outflow) and YSS3 (Y1 inflow) is provided in <br />Appendix D1 of the 2010 AHR. NPDESI2 exhibits a decreasing TDS trend, <br />with the peak value occurring in July 2007. <br />A slide north of Pond 012 was repaired in 2010 and 2011. An additional <br />pond, 012A, was constructed in August 2008 to compensate for the lost <br />capacity in Pond 012. Pond 012 was cleaned out in 2010 and 2012. <br />- NPDESI3. Construction of this pond was completed in December 2003. It <br />first began discharging on March 14, 2005. This year, this pond started <br />flowing in March and stopped flowing in May. Average flow this year was <br />0.0077 cfs, which was 16% less than the historic (2005 -2012) average <br />value, 0.0092 cfs. The timing of when flow values are collected affects <br />these averages. The TDS 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 late April and stopped flowing in May. The average <br />flow this year was 0.0037 cfs, which was 799& less than the historic <br />(2006 -2012) average value, 0.0174 cfs. The timing of when flow values <br />are collected affects these averages. TDS values are slightly <br />increasing. However, the peak value occurred in 2011. <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 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 />- NPDES10. 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 />91 <br />