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WHIRLWIND MINE, PERMIT NO. M-2007-044 <br /> FIRST QUARTER 2025 HYDROLOGICAL REPORT <br /> Attachment B. Rajah 49 Mine Thornton Portal <br /> Sampled Inflow Rate Field pH Temperature Dissolved Specific Oxygen- <br /> Sample Date Oxygen Conductance Reduction Comments <br /> (YIN) (gpm) (s.u.) (deg.C) (mg/L) (US/cm) Potential(mV) <br /> 9/21/2009 Yes 1-2 gpm 8.58 10.6 7.71 938 130 Sunny, dry, see Table 5 <br /> 6/30/2010 Yes 1-2 gpm 8.9 7.8 10.12 889 153 Hot, clear skies, dry, see Table 5 <br /> 5/24/2011 Yes negligible 9.16 11.1 8.03 906 120 Ptly cloudy, warm, see Table 5 <br /> 5/30/2012 Yes <1 gpm 9.67 6.4 9.19 939 NM OPR Probe Broken <br /> 6/17/2013 Yes <1 gpm 8.48 7.95 14.7% 928 -57.2 water was clear <br /> 6/17/2014 Yes <1 gpm 8.64 10.85 6.3 973 146.2 <br /> 8/5/2015 Yes <lgpm 8.35 12.98 3.61 1030 251 <br /> 6/2/2016 Yes <lgpm 8.17 10.04 1.60 888.8 214 <br /> 6/7/2017 Yes <lgpm 8.15 12.21 4.52 910.7 329 <br /> 6/20/2018 Yes <lgpm 8.59 9.55 12.04 642 -4.5 <br /> 6/25/2019 Yes <lgpm 8.80 10.5 4.46 859 196 <br /> 6/24/2020 Yes negligible 8.75 10.1 12.68 827 86.2 <br /> 7/13/2021 Yes negligible 8.01 13.43 12.42 907.5 428 <br /> 8/1/2022 Yes negligible 8.40 13.7 10.04 903.4 419 <br /> 7/25/2023 Yes negligible 8.77 13.13 10.26 887.1 295 <br /> 9/11/2024 Yes negligible 8.80 10.3 9.18 891 -46.2 <br />