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Colowyo Coal Company <br />Exhibit 2A <br />2017A=md Reclamation and <br />Hydrology Report <br />Water Quality Data <br />1992-2017 <br />New <br />Upper Good Spring Creek <br />COLOWYO MINE <br />(NUGSC) <br />NUGSC <br />Listing of Stream Lab Data <br />Flow <br />Field <br />Field <br />Field <br />Lab <br />Lab <br />TDS <br />NO3 <br />NO2 <br />NO3+NO2 <br />NH3 Total Bicarb <br />No datum => Blank <br />Rate <br />pH <br />Temp <br />Conduct <br />pH <br />Conduct <br />-180 <br />TSS <br />as N <br />as N <br />as N <br />as N P as HCO3 <br />Sulfate <br />As <br />Ca <br />Fe <br />Pb <br />Mg <br />Mn <br />Hg <br />Se <br />Na <br />Zn <br />cis <br />S U <br />deg C <br />umho/cm <br />S U <br />umho/cm <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA mgA mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />Statistics <br />Mean <br />297 <br />825 <br />794 <br />148415 <br />817 <br />149820 <br />113237 <br />4855 <br />357 <br />007 <br />366 <br />017 008 41219 <br />49825 <br />000 <br />12607 <br />077 <br />010 <br />12228 <br />005 <br />000 <br />001 <br />4724 <br />004 <br />Std. Dev. <br />326 <br />033 <br />494 <br />39029 <br />025 <br />27884 <br />23244 <br />10429 <br />125 <br />004 <br />1 32 <br />055 Oil 7013 <br />14329 <br />000 <br />1895 <br />155 <br />009 <br />2906 <br />006 <br />000 <br />000 <br />1563 <br />003 <br />Coef. Var. <br />Range <br />1994 <br />25 <br />225 <br />3023 <br />11 <br />2842 <br />1250 <br />992 <br />54 <br />009 <br />632 <br />405 0 855 433 <br />760 <br />00046 <br />1656 <br />853 <br />02 <br />2269 <br />0 285 <br />0 001 <br />0 035 <br />121 1 <br />019 <br />Max <br />2000 <br />940 <br />2260 <br />365000 <br />860 <br />360000 <br />161000 <br />99400 <br />640 <br />010 <br />690 <br />410 086 64800 <br />93000 <br />0 005 <br />16900 <br />854 <br />020 <br />22800 <br />029 <br />00010 <br />004 <br />13800 <br />020 <br />Min <br />006 <br />690 <br />010 <br />62700 <br />750 <br />75800 <br />36000 <br />200 <br />100 <br />001 <br />068 <br />005 001 21500 <br />17000 <br />00004 <br />340 <br />001 <br />000 <br />110 <br />001 <br />00000 <br />0 001 <br />1690 <br />001 <br />Max at <br />427/1998 <br />11/18/1997 <br />7/82002 <br />3/6/1998 <br />427/1998 <br />3/6/1998 <br />8/62001 <br />527/1993 <br />11/12004 <br />11/52001 <br />11/18/1994 <br />5/32011 1/1/1999 223/2010 <br />7132002 <br />11/12004 <br />822002 <br />5/17/1999 <br />5!72001 <br />822002 <br />5/17/1999 <br />5!72001 <br />7/312000 <br />11/102008 <br />1022000 <br />Min at <br />7/302013 <br />2/112002 <br />12/18/1996 <br />4/82002 <br />10242002 <br />527/1993 <br />5/82002 <br />9/30/1994 <br />520/1997 <br />10242002 <br />427/1998 <br />10242002 9/11/1997 10/8/1998 <br />520/1997 <br />5132002 <br />6/1/1993 <br />2/112002 <br />6282002 <br />427/1998 <br />3/142002 <br />6/1/1990 <br />520/1997 <br />427/1998 <br />10242002 <br /># Of Samples <br />218 <br />190 <br />224 <br />222 <br />226 <br />226 <br />103 <br />221 <br />87 <br />87 <br />111 <br />100 103 111 <br />119 <br />119 <br />172 <br />122 <br />119 <br />172 <br />117 <br />111 <br />111 <br />111 <br />111 <br />Station Date <br />NUGSC 11/302017 <br />023 <br />823 <br />45 <br />1680 <br />85 <br />1600 <br />1230 <br />5 <br />42 <br />01 <br />43 <br />01 005 470 <br />516 <br />0 003 <br />117 <br />009 <br />02 <br />122 <br />003 <br />0 001 <br />0 014 <br />49 <br />005 <br />NUGSC <br />