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2011 <br />0.317 <br />cfs <br />(monthly <br />measurements) <br />2010 <br />0.104 <br />cfs <br />(monthly <br />measurements) <br />2009 <br />0.102 <br />cfs <br />(monthly <br />measurements) <br />2008 <br />0.141 <br />cfs <br />(monthly <br />measurements) <br />2007 <br />0.081 <br />cfs <br />(weekly measurements) <br />2006 <br />0.103 <br />cfs <br />" <br />2005 <br />0.044 <br />cfs <br />" <br />2004 <br />0.037 <br />cfs <br />" <br />2003 <br />0.090 <br />cfs <br />" <br />2002 <br />0.037 <br />cfs <br />" <br />2001 <br />0.019 <br />cfs <br />This year's average flow was 380% above 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. The discharge culvert for Pond 016A <br />failed in April 2011. It was not repaired, and the pond was removed <br />later in 2011. The TDS trend at this site has stabilized. Baseline data <br />from Site SW- S2W -SG16 (WSH16) has been provided in Appendix E1 of the <br />2010 AHR. <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. It is now being monitored <br />as part of a CDPHE water quality assessment for total recoverable iron. <br />This site displays an increasing TDS trend, with the peak value <br />occurring in September 2005. <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 />12 <br />