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2005 0.044 cfs if <br />2004 0.037 cfs " <br />2003 0.090 cfs " <br />2002 0.037 cfs " <br />2001 0.019 cfs it <br />This year's average flow was 27% above the average historic (2001 -2012) <br />flow, 0.077 cfs. The timing of when flow values are collected affects <br />these averages. Mine pit pumping into this pond was responsible for many <br />of 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. Pond 016 was cleaned out in October of 2012. It <br />was not repaired, and the pond was removed later in 2011. The TDS trend <br />at this site is decreasing, with the peak occurring in August 2005. <br />Baseline data from Site SW- S2W -SG16 (WSH16) has been provided in <br />Appendix E1 of the 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; however, the peak value <br />occurred 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 all data <br />collected since the site began discharging; the second shows data for <br />this year. Review of the flow hydrographs indicates typical seasonal <br />variation due to snowmelt runoff in the spring, with additional peaks <br />due to pit pumpage, pond clean -out, and rainfall events. Average flow <br />values for each water year are: <br />2014 0.182 cfs (monthly measurements) <br />2013 0.168 cfs (monthly measurements) <br />13 <br />