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Colowyo Coal Company Exhibit 2A <br />2017 Annual Reclamation and Hydrology Report Water Quality Data <br />1992-2017 <br />COLOWYO MINE New Upper Good Spring Creek <br />NUGSC (NUGSC) <br />Listing of Stream Lab Data Flow Field Field Field Lab Lab TDS NO3 NO2 NO3+NO2 NH3 Total Bicarb <br />No datum => Blank Rate pH Temp Conduct pH Conduct -180 TSS as N as N as N as N P as HCO3 SuHate <br />cis S U deg C umho/cm S U umho/cm mgA mgA mgA mgA mgA mgA mgA mgA mgA <br />Statistics <br />Mean 297 825 794 148415 817 149820 113237 4855 357 007 366 017 008 41219 49825 <br />Std. Dev. 326 033 494 39029 025 27884 23244 10429 125 004 1 32 055 Oil 7013 14329 <br />Coat. Var. <br />Range 1994 25 225 3023 11 2842 1250 992 54 009 632 405 0 855 433 760 <br />Max 2000 940 2260 365000 860 360000 161000 99400 640 010 690 410 086 64800 93000 <br />Min 006 690 010 62700 750 75800 36000 200 1 00 001 058 005 001 21500 17000 <br />Max at 427/1998 11/18/1997 7/82002 3/6/1998 427/1998 3/6/1998 8/62001 527/1993 11/12004 11/52001 11/18/1994 5/32011 1/1/1999 2232010 7/82002 <br />Min at 7/302013 2/112002 12/18/1996 4/82002 10242002 527/1993 5/82002 9/30/1994 520/1997 10242002 427/1998 10242002 9/11/1997 10/3/1998 520/1997 <br />p Of Samples 218 190 224 222 226 226 103 221 67 87 111 100 103 111 119 <br />As <br />mgA <br />000 <br />000 <br />00046 <br />0 005 <br />00004 <br />11/12004 <br />5/32002 <br />119 <br />Ca <br />mgA <br />12607 <br />1895 <br />1656 <br />16900 <br />340 <br />822002 <br />6/1/1993 <br />172 <br />Fe <br />mgA <br />077 <br />155 <br />853 <br />854 <br />001 <br />5/17/1999 <br />2/112002 <br />122 <br />Pb <br />mg/ <br />010 <br />009 <br />02 <br />020 <br />000 <br />5172001 <br />6282002 <br />119 <br />Mg <br />mgA <br />12228 <br />2906 <br />2269 <br />22800 <br />110 <br />822002 <br />427/1998 <br />172 <br />Mn <br />mgA <br />005 <br />006 <br />0 285 <br />029 <br />001 <br />5/17/1999 <br />3/142002 <br />117 <br />Hg <br />mgA <br />000 <br />000 <br />0 001 <br />00010 <br />00000 <br />5172001 <br />6/1/1990 <br />111 <br />Se <br />mgA <br />001 <br />000 <br />0 035 <br />004 <br />0 001 <br />7/312000 <br />520/1997 <br />111 <br />Na <br />mgA <br />4724 <br />1563 <br />121 1 <br />13800 <br />1690 <br />11/102008 <br />427/1998 <br />111 <br />Zn <br />mgA <br />004 <br />003 <br />019 <br />020 <br />001 <br />1022000 <br />10242002 <br />111 <br />Station <br />Date <br />NUGSC <br />10/162007 <br />037 <br />83 <br />79 <br />1690 <br />85 <br />1590 <br />5 <br />126 <br />126 <br />NUGSC <br />11/8/2007 <br />028 <br />854 <br />46 <br />1750 <br />84 <br />1670 <br />1270 <br />5 <br />39 <br />01 <br />39 <br />01 <br />0 1 <br />521 <br />595 <br />0 003 <br />133 <br />006 <br />02 <br />131 <br />003 <br />0 001 <br />0 014 <br />57 <br />005 <br />NUGSC <br />12/182007 <br />058 <br />826 <br />4 <br />1740 <br />84 <br />1660 <br />5 <br />145 <br />140 <br />NUGSC <br />1/152008 <br />058 <br />836 <br />14 <br />1610 <br />83 <br />1570 <br />29 <br />109 <br />101 <br />NUGSC <br />2/132008 <br />071 <br />825 <br />41 <br />1640 <br />84 <br />1600 <br />1200 <br />5 <br />3 <br />01 <br />3 <br />01 <br />01 <br />539 <br />488 <br />0 003 <br />131 <br />006 <br />02 <br />118 <br />003 <br />0 001 <br />001 <br />56 <br />005 <br />NUGSC <br />3/112008 <br />123 <br />819 <br />35 <br />1640 <br />85 <br />1610 <br />6 <br />135 <br />119 <br />NUGSC <br />4/152008 <br />431 <br />847 <br />67 <br />1430 <br />85 <br />1390 <br />44 <br />116 <br />91 <br />NUGSC <br />5/122008 <br />1950 <br />804 <br />91 <br />960 <br />84 <br />936 <br />185 <br />88 <br />62 <br />NUGSC <br />6/182008 <br />566 <br />847 <br />176 <br />1160 <br />83 <br />1200 <br />880 <br />34 <br />33 <br />01 <br />33 <br />01 <br />01 <br />428 <br />289 <br />0 003 <br />104 <br />044 <br />02 <br />87 <br />005 <br />0 001 <br />001 <br />28 <br />005 <br />NUGSC <br />8/132008 <br />095 <br />791 <br />143 <br />1650 <br />83 <br />1600 <br />1280 <br />12 <br />64 <br />01 <br />64 <br />01 <br />01 <br />502 <br />486 <br />0 003 <br />134 <br />023 <br />02 <br />128 <br />004 <br />0 001 <br />0 018 <br />45 <br />005 <br />NUGSC <br />11/102008 <br />163 <br />784 <br />52 <br />1650 <br />82 <br />1570 <br />1220 <br />11 <br />38 <br />01 <br />38 <br />01 <br />01 <br />526 <br />478 <br />0 003 <br />138 <br />02 <br />02 <br />129 <br />006 <br />0 001 <br />0 014 <br />138 <br />005 <br />NUGSC <br />3/172009 <br />110 <br />787 <br />93 <br />1480 <br />83 <br />1370 <br />1120 <br />18 <br />29 <br />01 <br />29 <br />01 <br />01 <br />466 <br />465 <br />0 003 <br />128 <br />048 <br />02 <br />117 <br />003 <br />0 001 <br />0 013 <br />45 <br />005 <br />NUGSC <br />6/32009 <br />278 <br />767 <br />129 <br />1130 <br />83 <br />1120 <br />800 <br />188 <br />16 <br />01 <br />16 <br />01 <br />01 <br />536 <br />252 <br />0 003 <br />104 <br />241 <br />02 <br />79 <br />017 <br />0 001 <br />0 006 <br />29 <br />005 <br />NUGSC <br />8/192009 <br />169 <br />752 <br />148 <br />1580 <br />84 <br />1520 <br />1240 <br />19 <br />48 <br />005 <br />48 <br />01 <br />01 <br />574 <br />469 <br />0 003 <br />151 <br />015 <br />02 <br />155 <br />003 <br />0 001 <br />0 016 <br />57 <br />005 <br />NUGSC <br />1122009 <br />121 <br />86 <br />71 <br />1590 <br />82 <br />1500 <br />1120 <br />6 <br />43 <br />01 <br />43 <br />01 <br />01 <br />620 <br />496 <br />0 003 <br />127 <br />016 <br />02 <br />124 <br />006 <br />0 001 <br />0 016 <br />51 <br />005 <br />NUGSC <br />2232010 <br />121 <br />804 <br />69 <br />1600 <br />81 <br />1480 <br />1290 <br />5 <br />39 <br />01 <br />39 <br />01 <br />005 <br />648 <br />544 <br />0 003 <br />140 <br />013 <br />02 <br />139 <br />004 <br />0 001 <br />0 016 <br />54 <br />005 <br />NUGSC <br />5/52010 <br />437 <br />824 <br />101 <br />1120 <br />85 <br />909 <br />780 <br />216 <br />12 <br />01 <br />12 <br />01 <br />016 <br />385 <br />257 <br />0 003 <br />105 <br />222 <br />02 <br />76 <br />014 <br />0 001 <br />0 005 <br />32 <br />005 <br />NUGSC <br />8/32010 <br />060 <br />874 <br />179 <br />1470 <br />84 <br />1310 <br />1050 <br />31 <br />41 <br />01 <br />41 <br />01 <br />005 <br />420 <br />422 <br />0 003 <br />111 <br />013 <br />02 <br />115 <br />004 <br />0 001 <br />0 012 <br />45 <br />005 <br />NUGSC <br />11/4/2010 <br />079 <br />845 <br />48 <br />1610 <br />83 <br />1420 <br />1140 <br />10 <br />33 <br />01 <br />33 <br />01 <br />005 <br />475 <br />466 <br />0 003 <br />120 <br />019 <br />02 <br />123 <br />003 <br />0 001 <br />001 <br />52 <br />005 <br />NUGSC <br />3212011 <br />330 <br />746 <br />54 <br />1540 <br />83 <br />1340 <br />1150 <br />29 <br />28 <br />01 <br />28 <br />01 <br />005 <br />483 <br />427 <br />0 003 <br />124 <br />048 <br />02 <br />102 <br />007 <br />0 001 <br />0 016 <br />46 <br />005 <br />NUGSC <br />5132011 <br />1020 <br />819 <br />84 <br />1120 <br />83 <br />924 <br />790 <br />164 <br />21 <br />01 <br />21 <br />41 <br />013 <br />421 <br />261 <br />0 003 <br />109 <br />1 79 <br />02 <br />80 <br />01 <br />0 001 <br />0 006 <br />30 <br />005 <br />NUGSC <br />8/172011 <br />231 <br />887 <br />146 <br />1490 <br />84 <br />1470 <br />1080 <br />8 <br />41 <br />01 <br />41 <br />01 <br />005 <br />430 <br />401 <br />0 003 <br />118 <br />013 <br />02 <br />111 <br />004 <br />0 001 <br />0 014 <br />39 <br />005 <br />NUGSC <br />11/10/2011 <br />1 32 <br />873 <br />22 <br />1590 <br />83 <br />1540 <br />1170 <br />20 <br />39 <br />01 <br />39 <br />01 <br />005 <br />491 <br />486 <br />0 003 <br />134 <br />027 <br />02 <br />120 <br />004 <br />0 001 <br />0 012 <br />46 <br />005 <br />NUGSC <br />3/132012 <br />834 <br />820 <br />25 <br />1390 <br />82 <br />1390 <br />960 <br />56 <br />30 <br />01 <br />3 <br />01 <br />Oil <br />429 <br />404 <br />0 003 <br />129 <br />096 <br />02 <br />104 <br />012 <br />0 001 <br />0 011 <br />38 <br />005 <br />NUGSC <br />5/142012 <br />1 70 <br />814 <br />120 <br />1400 <br />85 <br />1220 <br />1070 <br />112 <br />36 <br />01 <br />36 <br />01 <br />012 <br />509 <br />363 <br />0 003 <br />121 <br />166 <br />02 <br />109 <br />009 <br />0 001 <br />0 009 <br />40 <br />005 <br />NUGSC <br />822012 <br />016 <br />808 <br />124 <br />1580 <br />85 <br />1520 <br />1250 <br />27 <br />5 <br />01 <br />5 <br />01 <br />005 <br />408 <br />527 <br />0 003 <br />123 <br />035 <br />02 <br />145 <br />006 <br />0 001 <br />0 016 <br />54 <br />005 <br />NUGSC <br />10/312012 <br />037 <br />821 <br />57 <br />1820 <br />85 <br />1630 <br />1360 <br />5 <br />58 <br />01 <br />58 <br />01 <br />005 <br />451 <br />613 <br />0 003 <br />138 <br />009 <br />02 <br />158 <br />003 <br />0 001 <br />0 017 <br />59 <br />005 <br />NUGSC <br />3/122013 <br />127 <br />839 <br />46 <br />1660 <br />85 <br />1620 <br />1290 <br />12 <br />38 <br />01 <br />38 <br />01 <br />005 <br />443 <br />544 <br />0 003 <br />142 <br />023 <br />02 <br />132 <br />005 <br />0 001 <br />0 016 <br />54 <br />005 <br />NUGSC <br />5/212013 <br />347 <br />883 <br />126 <br />1430 <br />84 <br />1280 <br />1050 <br />242 <br />28 <br />01 <br />28 <br />01 <br />015 <br />386 <br />429 <br />0 003 <br />124 <br />216 <br />02 <br />99 <br />012 <br />0 001 <br />0 011 <br />38 <br />005 <br />NUGSC <br />7/302013 <br />006 <br />844 <br />168 <br />1730 <br />85 <br />1610 <br />1350 <br />5 <br />42 <br />01 <br />42 <br />01 <br />005 <br />433 <br />650 <br />0 003 <br />126 <br />005 <br />02 <br />149 <br />003 <br />0 001 <br />0 016 <br />59 <br />005 <br />NUGSC <br />11/182013 <br />016 <br />834 <br />53 <br />2020 <br />85 <br />1930 <br />1550 <br />5 <br />56 <br />01 <br />56 <br />01 <br />005 <br />522 <br />712 <br />0 003 <br />155 <br />013 <br />02 <br />166 <br />003 <br />0 001 <br />0 020 <br />61 <br />005 <br />NUGSC <br />3/192014 <br />15 <br />839 <br />29 <br />1770 <br />85 <br />2220 <br />1280 <br />5 <br />20 <br />01 <br />20 <br />01 <br />005 <br />553 <br />782 <br />0 003 <br />152 <br />016 <br />02 <br />155 <br />005 <br />0 001 <br />0 010 <br />93 <br />005 <br />NUGSC <br />5/20/2014 <br />764 <br />835 <br />102 <br />1140 <br />84 <br />1000 <br />770 <br />155 <br />25 <br />01 <br />25 <br />01 <br />028 <br />384 <br />298 <br />0 003 <br />99 <br />413 <br />02 <br />71 <br />018 <br />0 001 <br />0 012 <br />26 <br />005 <br />NUGSC <br />8282014 <br />1 89 <br />830 <br />138 <br />1630 <br />84 <br />1560 <br />1100 <br />46 <br />27 <br />01 <br />27 <br />01 <br />006 <br />451 <br />479 <br />0 003 <br />130 <br />028 <br />02 <br />117 <br />005 <br />0 001 <br />0 010 <br />47 <br />005 <br />NUGSC <br />11/62014 <br />074 <br />800 <br />54 <br />1690 <br />83 <br />1580 <br />1210 <br />8 <br />29 <br />01 <br />29 <br />01 <br />005 <br />552 <br />510 <br />0 003 <br />133 <br />013 <br />02 <br />122 <br />003 <br />0 001 <br />0 011 <br />52 <br />005 <br />NUGSC <br />1/142015 <br />079 <br />792 <br />32 <br />1700 <br />83 <br />1680 <br />1260 <br />6 <br />34 <br />01 <br />34 <br />01 <br />005 <br />496 <br />558 <br />0 003 <br />136 <br />005 <br />02 <br />134 <br />003 <br />0 001 <br />0 012 <br />50 <br />005 <br />NUGSC <br />4/82015 <br />291 <br />792 <br />59 <br />1460 <br />85 <br />1350 <br />1060 <br />52 <br />27 <br />01 <br />27 <br />01 <br />010 <br />452 <br />416 <br />0 005 <br />119 <br />005 <br />002 <br />108 <br />002 <br />0 001 <br />0 008 <br />39 <br />001 <br />NUGSC <br />8/42015 <br />306 <br />834 <br />128 <br />1480 <br />84 <br />1470 <br />1020 <br />15 <br />26 <br />01 <br />26 <br />01 <br />005 <br />477 <br />411 <br />0 003 <br />116 <br />026 <br />02 <br />116 <br />003 <br />0 001 <br />0 010 <br />42 <br />005 <br />NUGSC <br />10212015 <br />028 <br />835 <br />94 <br />1570 <br />84 <br />1640 <br />1220 <br />5 <br />34 <br />01 <br />34 <br />01 <br />005 <br />452 <br />469 <br />0 003 <br />122 <br />007 <br />02 <br />131 <br />003 <br />0 001 <br />0 011 <br />45 <br />005 <br />NUGSC <br />2252016 <br />079 <br />801 <br />39 <br />1590 <br />85 <br />1370 <br />1110 <br />6 <br />27 <br />01 <br />27 <br />01 <br />005 <br />462 <br />429 <br />0 003 <br />121 <br />015 <br />02 <br />120 <br />003 <br />0 001 <br />0 011 <br />47 <br />005 <br />NUGSC <br />4272016 <br />1291 <br />798 <br />93 <br />1060 <br />85 <br />954 <br />710 <br />382 <br />18 <br />01 <br />18 <br />01 <br />039 <br />385 <br />207 <br />0 003 <br />90 <br />528 <br />02 <br />66 <br />025 <br />0 001 <br />0 005 <br />24 <br />005 <br />NUGSC <br />9/132016 <br />021 <br />802 <br />129 <br />1570 <br />85 <br />1500 <br />1150 <br />5 <br />41 <br />01 <br />42 <br />01 <br />005 <br />427 <br />489 <br />0 003 <br />114 <br />005 <br />02 <br />133 <br />003 <br />0 001 <br />0 015 <br />49 <br />005 <br />NUGSC <br />11222016 <br />015 <br />796 <br />56 <br />1450 <br />85 <br />1420 <br />1030 <br />10 <br />28 <br />01 <br />28 <br />01 <br />005 <br />429 <br />410 <br />0 003 <br />110 <br />016 <br />02 <br />118 <br />003 <br />0 001 <br />0 013 <br />44 <br />005 <br />NUGSC <br />3/162017 <br />1071 <br />789 <br />79 <br />1340 <br />86 <br />1310 <br />890 <br />18 <br />17 <br />01 <br />18 <br />01 <br />005 <br />404 <br />332 <br />0 003 <br />110 <br />034 <br />02 <br />89 <br />003 <br />0 001 <br />0 009 <br />36 <br />005 <br />NUGSC <br />5232017 <br />499 <br />839 <br />106 <br />1200 <br />86 <br />1130 <br />770 <br />110 <br />16 <br />01 <br />16 <br />01 <br />Oil <br />399 <br />267 <br />0 003 <br />108 <br />134 <br />02 <br />89 <br />008 <br />0 001 <br />0 006 <br />31 <br />005 <br />NUGSC <br />9/192017 <br />014 <br />822 <br />107 <br />1620 <br />84 <br />1620 <br />1210 <br />5 <br />42 <br />01 <br />42 <br />01 <br />005 <br />460 <br />533 <br />0 003 <br />121 <br />0 08 <br />02 <br />132 <br />003 <br />0 001 <br />0 011 <br />48 <br />005 <br />NUGSC <br />