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Colowyo Coal Company <br />2018 Annual Reclamation and Hydrology Report <br />Exhibit IA <br />Water Quality Data <br />1983-2018 <br />Lower Taylor Creek <br />COLOWYO MINE <br />(LTC) <br />LTC <br />Listing of Stream Lab Data <br />Flow <br />Field <br />Field <br />Field <br />Lab <br />Lab <br />TDS <br />NO3+141O2 <br />NH3 <br />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 HCO3 <br />Sulfate <br />P <br />As <br />Ca <br />Fe <br />Pb <br />Mg <br />Mn <br />Hg <br />Se <br />Na <br />Zn <br />cfs <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 />mgll <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mgA <br />mg4 <br />mgA <br />Statistics <br />Mean <br />036 <br />835 <br />951 <br />186036 <br />816 <br />176383 <br />1411 09 <br />28982 <br />126 <br />009 <br />38000 <br />674 O6 <br />274 <br />000 <br />9514 <br />383 <br />008 <br />12382 <br />028 <br />000 <br />001 <br />17771 <br />006 <br />Std. Dev. <br />080 <br />031 <br />642 <br />69356 <br />030 <br />61489 <br />59211 <br />96320 <br />136 <br />006 <br />14746 <br />33866 <br />21 08 <br />000 <br />2576 <br />1603 <br />008 <br />4152 <br />105 <br />000 <br />000 <br />15027 <br />012 <br />Coef. Var. <br />Range <br />63 <br />19 <br />251 <br />35172 <br />17 <br />3480 <br />2766 <br />6938 <br />499 <br />036 <br />658 <br />1591 <br />184 995 <br />0 027 <br />1332 <br />13199 <br />028 <br />230 <br />7 845 <br />00009 <br />0 015 <br />589 <br />0 795 <br />Max <br />63 <br />93 <br />25 <br />3740 <br />87 <br />3680 <br />2910 <br />6940 <br />5 <br />038 <br />725 <br />1610 <br />185 <br />0 028 <br />159 <br />132 <br />03 <br />238 <br />785 <br />0 001 <br />0 016 <br />595 <br />08 <br />Min <br />0 <br />74 <br />-01 <br />2228 <br />7 <br />200 <br />144 <br />2 <br />001 <br />002 <br />67 <br />19 <br />0 005 <br />0 001 <br />258 <br />001 <br />002 <br />8 <br />0 005 <br />00001 <br />0 001 <br />6 <br />0 005 <br />Max at <br />4/29/1986 <br />8/12/1983 <br />6/18/1987 <br />11/10/2011 <br />9/13/2016 <br />11/30/2017 <br />11/10/2011 <br />2/28/1990 <br />5/21/2013 <br />2/5/2001 <br />11/10/2011 <br />11/10/2011 <br />3/31/1988 <br />3/1/1998 <br />11/10/2011 <br />2/28/1990 <br />2/28/1990 <br />10/12/1988 <br />3/1/1988 <br />2/5/2001 <br />8/13/1984 <br />9/19/2017 <br />2/28/1990 <br />Min at <br />12/13/2002 <br />6/28/1985 <br />11/11/1999 <br />5/19/1997 <br />2/22/1989 <br />2/28/1990 <br />2/28/1990 <br />MOM 989 <br />2/7/2000 <br />10/5/1989 <br />3/5/2001 <br />228/1990 <br />9/11/1997 <br />1/6/1998 <br />2/5/2001 <br />9/13/1995 <br />4/17/2000 <br />2/28/1990 <br />7/1/1996 <br />6/1/1993 <br />10/3/1996 <br />2/28/1990 <br />628/1985 <br />N Of Samples <br />229 <br />114 <br />120 <br />112 <br />154 <br />154 <br />81 <br />154 <br />69 <br />70 <br />77 <br />77 <br />77 <br />77 <br />79 <br />81 <br />78 <br />75 <br />76 <br />77 <br />77 <br />77 <br />77 <br />Station <br />Date <br />LTC <br />8/24/1995 <br />0 003 <br />82 <br />15 <br />1880 <br />84 <br />1900 <br />12 <br />LTC <br />9/13/1995 <br />0 003 <br />84 <br />14 <br />1830 <br />84 <br />1840 <br />1380 <br />5 <br />006 <br />005 <br />329 <br />658 <br />0 005 <br />0 001 <br />103 <br />001 <br />002 <br />161 <br />0 005 <br />00002 <br />0 002 <br />131 <br />001 <br />LTC <br />1025/1995 <br />81 <br />1700 <br />82 <br />1710 <br />5 <br />LTC <br />1129/1995 <br />0 003 <br />83 <br />1 <br />2330 <br />83 <br />2330 <br />20 <br />LTC <br />12/5/1995 <br />0 003 <br />82 <br />1 <br />2340 <br />81 <br />1980 <br />1470 <br />28 <br />002 <br />009 <br />344 <br />650 <br />0201 <br />0 001 <br />109 <br />095 <br />002 <br />155 <br />003 <br />00002 <br />0 003 <br />122 <br />003 <br />LTC <br />1/3/1996 <br />0 <br />LTC <br />220/1996 <br />022 <br />867 <br />3 <br />1006 <br />82 <br />839 <br />570 <br />1040 <br />05 <br />008 <br />188 <br />220 <br />0 901 <br />0 007 <br />573 <br />233 <br />002 <br />521 <br />0 721 <br />00002 <br />0 003 <br />68 <br />015 <br />LTC <br />3/18/1996 <br />0 <br />LTC <br />4/1/1996 <br />01 <br />894 <br />10 <br />1940 <br />83 <br />1950 <br />1390 <br />42 <br />LTC <br />5/6/1996 <br />02 <br />846 <br />13 <br />1835 <br />84 <br />1865 <br />1330 <br />30 <br />002 <br />008 <br />367 <br />560 <br />0 034 <br />0 001 <br />101 <br />037 <br />002 <br />139 <br />0 013 <br />00002 <br />0 005 <br />119 <br />003 <br />LTC <br />6/3/1996 <br />03 <br />812 <br />12 <br />1510 <br />84 <br />1527 <br />5 <br />LTC <br />7/l/1996 <br />003 <br />823 <br />13 <br />1484 <br />84 <br />1736 <br />1220 <br />8 <br />002 <br />005 <br />376 <br />530 <br />0 005 <br />0 001 <br />85 <br />01 <br />002 <br />131 <br />0 005 <br />00002 <br />0 002 <br />109 <br />002 <br />LTC <br />8/8/1996 <br />004 <br />855 <br />16 <br />1835 <br />85 <br />1820 <br />5 <br />005 <br />LTC <br />925/1996 <br />001 <br />9 <br />11 <br />1563 <br />82 <br />1904 <br />8 <br />014 <br />342 <br />620 <br />0 005 <br />0 001 <br />99 <br />Oil <br />01 <br />134 <br />003 <br />00002 <br />0 002 <br />117 <br />005 <br />LTC <br />10/3/1996 <br />006 <br />764 <br />108 <br />2620 <br />83 <br />2012 <br />5 <br />003 <br />340 <br />590 <br />0 005 <br />0 001 <br />106 <br />007 <br />0 04 <br />137 <br />001 <br />00002 <br />0 001 <br />128 <br />003 <br />LTC <br />11/21/1996 <br />007 <br />86 <br />48 <br />1420 <br />85 <br />1898 <br />10 <br />024 <br />292 <br />590 <br />0 007 <br />0 001 <br />118 <br />009 <br />002 <br />136 <br />00002 <br />0 003 <br />143 <br />003 <br />LTC <br />12/18/1996 <br />0 <br />LTC <br />1/19/1997 <br />LTC <br />225/1997 <br />LTC <br />3/19/1997 <br />LTC <br />421 /1997 <br />Oil <br />87 <br />72 <br />1607 <br />84 <br />1790 <br />5 <br />007 <br />374 <br />640 <br />0 023 <br />0 001 <br />102 <br />017 <br />004 <br />154 <br />0 014 <br />00002 <br />0 004 <br />152 <br />002 <br />LTC <br />5/19/1997 <br />211 <br />85 <br />199 <br />811 <br />85 <br />1050 <br />254 <br />074 <br />284 <br />250 <br />0 005 <br />0 002 <br />80 <br />411 <br />004 <br />717 <br />0 111 <br />00002 <br />0 004 <br />448 <br />003 <br />LTC <br />626/1997 <br />069 <br />83 <br />193 <br />1330 <br />82 <br />1370 <br />16 <br />05 <br />355 <br />420 <br />0 005 <br />0 001 <br />831 <br />041 <br />004 <br />112 <br />0 017 <br />00002 <br />0 004 <br />791 <br />002 <br />LTC <br />7/9/1997 <br />031 <br />86 <br />188 <br />1353 <br />85 <br />1360 <br />8 <br />005 <br />320 <br />450 <br />0 005 <br />0 001 <br />84 <br />04 <br />004 <br />117 <br />003 <br />00002 <br />0 004 <br />945 <br />005 <br />LTC <br />8/12/1997 <br />016 <br />839 <br />158 <br />1392 <br />84 <br />1810 <br />1180 <br />16 <br />042 <br />005 <br />328 <br />420 <br />0 005 <br />0 001 <br />939 <br />026 <br />004 <br />121 <br />0 009 <br />00002 <br />0 004 <br />992 <br />003 <br />LTC <br />9/11/1997 <br />004 <br />84 <br />157 <br />1370 <br />84 <br />1740 <br />1210 <br />5 <br />017 <br />005 <br />332 <br />550 <br />0 005 <br />0 001 <br />806 <br />017 <br />004 <br />134 <br />0 006 <br />00002 <br />0 003 <br />117 <br />002 <br />LTC <br />10/30/1997 <br />023 <br />77 <br />22 <br />1925 <br />83 <br />1930 <br />6 <br />LTC <br />11/18/1997 <br />003 <br />85 <br />4 <br />1430 <br />81 <br />1890 <br />1340 <br />6 <br />167 <br />005 <br />467 <br />560 <br />001 <br />0 001 <br />119 <br />004 <br />004 <br />142 <br />0 016 <br />00002 <br />0 004 <br />124 <br />004 <br />LTC <br />12/8/1997 <br />02 <br />85 <br />3 <br />1320 <br />83 <br />1910 <br />5 <br />LTC <br />1/6/1998 <br />24 <br />83 <br />02 <br />1990 <br />82 <br />1930 <br />1410 <br />70 <br />159 <br />006 <br />451 <br />590 <br />0 006 <br />0 001 <br />113 <br />153 <br />004 <br />139 <br />0 092 <br />00002 <br />0 004 <br />118 <br />002 <br />LTC <br />2/19/1998 <br />001 <br />83 <br />2140 <br />82 <br />2110 <br />46 <br />LTC <br />3/6/1998 <br />001 <br />76 <br />3580 <br />75 <br />3570 <br />14 <br />LTC <br />4/9/1998 <br />3 <br />81 <br />1790 <br />82 <br />1760 <br />67 <br />LTC <br />427/1998 <br />3 <br />85 <br />2090 <br />84 <br />1370 <br />900 <br />168 <br />192 <br />005 <br />369 <br />333 <br />005 <br />0 005 <br />116 <br />477 <br />002 <br />896 <br />01 <br />0 001 <br />0 007 <br />61 9 <br />001 <br />LTC <br />6/11/1998 <br />07 <br />85 <br />99 <br />1424 <br />83 <br />1320 <br />22 <br />LTC <br />7/6/1998 <br />04 <br />89 <br />22 <br />1629 <br />83 <br />1560 <br />73 <br />LTC <br />8/3/1998 <br />028 <br />86 <br />15 <br />1692 <br />82 <br />1550 <br />1200 <br />40 <br />157 <br />005 <br />383 <br />493 <br />005 <br />0 005 <br />729 <br />066 <br />002 <br />111 <br />002 <br />0 001 <br />0 005 <br />96 <br />001 <br />LTC <br />9/10/1998 <br />037 <br />86 <br />147 <br />1843 <br />83 <br />1590 <br />5 <br />LTC <br />10/8/1998 <br />018 <br />86 <br />12 <br />1954 <br />63 <br />1650 <br />1350 <br />5 <br />165 <br />005 <br />321 <br />537 <br />005 <br />0 005 <br />802 <br />012 <br />002 <br />122 <br />002 <br />0 001 <br />0 005 <br />123 <br />001 <br />LTC <br />11/5/1998 <br />03 <br />83 <br />89 <br />2015 <br />78 <br />1810 <br />6 <br />LTC <br />222/1999 <br />87 <br />55 <br />2027 <br />81 <br />1860 <br />22 <br />LTC <br />3/3/1999 <br />076 <br />86 <br />71 <br />1846 <br />81 <br />1830 <br />16 <br />LTC <br />4/6/1999 <br />1 <br />846 <br />2107 <br />8 <br />1860 <br />6 <br />LTC <br />5/17/1999 <br />3 <br />848 <br />77 <br />1017 <br />82 <br />1380 <br />980 <br />86 <br />1 53 <br />005 <br />351 <br />362 <br />005 <br />0 005 <br />724 <br />19 <br />002 <br />965 <br />006 <br />0 001 <br />0 005 <br />814 <br />001 <br />LTC <br />6/10/1999 <br />07 <br />859 <br />95 <br />1406 <br />8 <br />1270 <br />76 <br />LTC <br />7/6/1999 <br />21 <br />84 <br />171 <br />1480 <br />81 <br />1470 <br />1040 <br />38 <br />076 <br />005 <br />314 <br />400 <br />005 <br />0 005 <br />632 <br />051 <br />002 <br />102 <br />002 <br />0 001 <br />0 005 <br />826 <br />001 <br />LTC <br />