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Mman <br />Mr MMMM MMMMMM <br />WHIRLWINDMINE, PERMITNO. M-2007-044 <br />SECONDQUARTER2015HYDROLOGICALREPORT <br />Attachment2. WhirlwindDecline <br />jw r . <br />Monitoring <br />Date <br />Sample <br />Location <br />InflowRate(') <br />m <br />FieldpH <br />S.U. <br />Temperature <br />deg. C <br />Dissolved <br />Oxygen <br />m <br />Specific <br />Conductance <br />uS/cm <br />Oxygen - <br />Reduction <br />PotentialmVComments <br />3/10/2008WWSump 2.48.30 11.0NMNMNMSeeTable1 <br />6/19/2008WWSump 2.810.2611.50.78 592 114 <br />SeeTable1 <br />9/8/2008WWSump 2.29.1111.0 8.4864962SeeTable1 <br />12/16/2008 <br />WWSump 1.78.75 10.75.22609 149 <br />SeeTable1 <br />3/5/2009WWSump 2.18.5211.18.24 618151Noanalyticalsamplescollected <br />4/20/2009WWSump 2.2 8.4111.26.68626177Noanalyticalsamplescollected <br />8/11/2009 WWSump 1.68.7611.9 6.44599152Noanalyticalsamplescollected <br />12/1/2009 WWSump 1.48.6111.56.54624160Noanalyticalsamplescollected <br />2/2/2010WWDecline2.07.0611.37.02597170Noanalyticalsamplescollected <br />4/21/2010 <br />WWDecline 1.98.0712.36.76576201SeeTable1 <br />9/8/2010WWDecline 1.78.6511.94.53592133Noanalyticalsamplescollected <br />11/4/2010WWDecline3.48.4911.62.22578207 Noanalyticalsamplescollected <br />2/7/2011WWDecline1.78.49 11.32.26590151 <br />SeeTable1 <br />6/20/2011WWDecline1.28.17 11.72.42620 159 <br />Noanalyticalsamplescollected <br />8/20/2011 <br />WWDecline1.38.5411.62.54644 163Noanalyticalsamplescollected <br />10/25/2011WWDecline 1.08.48 11.52.63 618157Noanalyticalsamplescollected <br />11/9/2011WWDecline 1.08.1911.5 3.09631234SeeTable1 <br />3/28/2012WWDecline0.78.3211.52.41592173 <br />SeeNote2 <br />1) FromFirstQuarter2008toFourthQuarter2009, theinflowratewasestimatedoverthequarterbycalculatingthevolumeofwaterpumpedoutofthemineandtreated <br />andestimationsofthevolumeofwaterevaporatedofftheuntreatedwatertankandbroughtoutofthemineasmoistureinwasterock, ore, andventilatedair. AsoftheFirst <br />Quarter2010, waterinflowisestimatedbasedontheapproximatewaterelevationandthevoidvolumeofthemineworkings. <br />2) <br />Access tothe minewas <br />temporarily restrictedasof <br />thethird quarter <br />2012. Inflow ratemeasurementswill <br />be resumedwhentheportal <br />is reopened.