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Hubberson Gulch / Dry Creek <br />Surface Water Site SW-S2W-SG9 (WSH9). <br />This Hubberson Gulch site is upstream of NPDESI7 and all other mine - <br />related discharges in the II -W South Expansion area. Monitoring at this <br />site began in August 1997. No monitoring was performed in the 1999 <br />calendar year but was resumed in 2000. This site is monitored in June <br />and September. In September 2017 the site was dry. This site displays a <br />stable TDS trend. <br />NPDES 017 (NPDESI7). <br />This site exists on Hubberson Gulch in the II -W South Expansion area. <br />Construction of Pond 017 began on October 14, 2002 and was completed in <br />December 2002. It was monitored weekly (except when inaccessible by <br />truck) but is now monitored monthly. Average flow values for each water <br />year are: <br />2017 <br />0.100 <br />cfs <br />(monthly <br />measurements) <br />2016 <br />0.113 <br />cfs <br />(monthly <br />measurements) <br />2015 <br />0.173 <br />cfs <br />(monthly <br />measurements) <br />2014 <br />0.199 <br />cfs <br />(monthly <br />measurements) <br />2013 <br />0.151 <br />cfs <br />(monthly <br />measurements) <br />2012 <br />0.053 <br />cfs <br />(monthly <br />measurements) <br />2011 <br />0.681 <br />cfs <br />(monthly <br />measurements) <br />2010 <br />0.225 <br />cfs <br />(weekly <br />measurements till 7/1, then monthly) <br />2009 <br />0.245 <br />cfs <br />(weekly <br />measurements) <br />2008 <br />0.272 <br />cfs <br />" <br />2007 <br />0.163 <br />cfs <br />" <br />2006 <br />0.162 <br />cfs <br />" <br />2005 <br />0.119 <br />cfs <br />" <br />2004 <br />0.080 <br />cfs <br />" <br />2003 <br />0.187 <br />cfs <br />" <br />This year's average flow value, 0.100 cfs, is below the average historic <br />(2003-2017) flow, 0.200 cfs. The timing of when flow values are <br />collected affects these averages. Also affecting the historic flow <br />average is a large number of `no flows' that occurred up thru 2007. This <br />13 <br />