2009-03-27_REPORT - C1981019 ‎(9)‎

• Permit No: C1981019
• IBM Index Class Name: REPORT
• Doc Date: 3/27/2009
• Doc Name: 2008 AHR & ARR Exhibit 2A and Exhibit 2B
• From: Colowyo Coal Company
• To: DRMS
• Annual Report Year: 2008
• Permit Index Doc Type: Hydrology Report
• Email Name: JRS
• Media Type: D
• Archive: No

colowyo Coal CO-P-r Exhibit 2A
AnnualRerhm tiauandXydmlagfRepon
Water Quality Data
COLOWYO MINE 1983-2008
Lower Taylor Creek
(LTC)
Listing of Stream Lab Data
Flow Field Field Field Lab Lab TDS N03+NO2 NH3 Bicarb Ambig. Ambig. SNAmbig. SNAmbig. SNAmbig. SNAmbig. SW Ambig. SNAmbig. SNAmbig. SNAmbig. SNAmbig. S"
No datum => Blank Rate pH Temp Conduct pH Conduct -180 TSS as N as N as CaCO3 Sulfate P As Ca Fe Pb Mg Mn Hg Se Na Zn
cfs S.U. deg C umholcm S.U. umholcm mgA mgA mgA mgA mgA mg/I mgA mgA mgA mgA mg4 mgA mg4 mgA mgA mgA mgA
Statistics
Mean 0.59 9.44 777.75 1613.23 800.22 1592.35 1127.76 468.15 0.76 0.06 297.42 322.65 1.90 46.24 47.16 2.56 56.85 58.09 0.19 0.00 46.40 46.42 0.06
Std. Dev. 0.86 0.33 6.50 452.45 0.27 438.92 355.76 2035.66 1.45 0,07 83.38 211.36 24.93 0.00 25.92 18.67 0.05 45.65 1.24 0.00 0.00 36.07 0.14
Coef. Var.
Range 6.3 1.9 25.1 3357.2 1.6 3370 1786 20582 4.94 0.36 400 1109 184.995 0.027 108.2 131.99 0.28 230 7.845 0.0009 0.015 168 0.795
Max 6.3 9.3 25 3580 8.6 3570 1930 20584 4.95 0.38 467 1128 185 0.028 134 132 0.3 238 7.85 0.001 0.016 174 0.8
Min 0 7.4 -0.1 222.8 7 200 144 2 0.01 0.02 67 19 0.005 0.001 25.8 0.01 0.02 8 0.005 0.0001 0.001 6 0.005
Max at 4129/ 1986 8/12/1983 611811987 3/611998 2125/ 1991 3/6/1998 1015/1989 3/1/1988 6/28/1985 2/5/2001 11/18/1997 10/5/1989 3/31/1988 311/1998 2/2411986 2128/1990 2/28/1990 10/12/1988 3/1/1988 2/5
/2001 811311984 1 0/511989 2128/1990
Min at 1 2/1312002 6/28/1985 11/1111999 5/19/1997 2122/ 1989 2128/1990 2/28/1990 313011989 217/2000 10/5/1989 3/512001 212811990 9111/1997 1/6/1998 2/5/2001 9/1311995 4/1712000 2/28/1990 7/111996 6/
1/1993 10/311996 2128/1990 6/28/1985
#ofSamples 195 190 188 90 264 132 59 133 95 77 56 100 110 112 116 115 109 107 109 110 110 110 55
Station Sample Flow Field Field Field Lab Lab TDS N03+NO2 NH3 Bicarb Ambig. Ambig. SNAmbig. SNAmbig. SNAmbig. SNAmbig. SW Ambig. SNAmbig. SNAmbig. SNAmbig. SNAmbig. Sw
Name Date Rate pH Temp Conduct pH Conduct -180 TSS as N as N as CaCO3 Sulfate P As Ca Fe Pb Mg Mn Hg Se Na Zn
cis S.U. deg C umho/cm S.U. umholcm mgA mgA mgA mgA mgA mgA mgA mg4 mgA mgA mgA mg/l mgA mgA mg4 mg/I mgA

LTC --
11/21/1996 ---
0.07 .....
8.6 -
4.8 ------
1420 ----
8.5 -----
1898 ---- ------
10 ----
0.24 -----
292
590 ------
0.007 ------- -
0.001 ---
118 -
0.09 ----- -
0.02 ------
136
0,0002
0.003 -
143 _---
0.03
LTC 1211811996 0
LTC 1/1911997
LTC 2125/1997
LTC 3119/1997
LTC 4/21/1997 0.11 8.7 7.2 1607 8.4 1790 5 0.07 374 640 0.023 0.001 102 0.17 0.04 154 0.014 0.0002 0.004 152 0.02
LTC 5/19/1997 2.11 8.5 19.9 811 8.5 1050 254 0.74 284 250 0.005 0.002 80 4.11 0.04 71.7 0.111 0.0002 0.004 44.8 0.03
LTC 6126/1997 0.69 8.3 19.3 1330 8.2 1370 16 0.5 355 420 0.005 0.001 83.1 0.41 0.04 112 0.017 0.0002 0.004 79.1 0.02
LTC 7/9/1997 0.31 8.6 18.8 1353 8.5 1360 8 0.05 320 450 0.005 0,001 84 0.4 0.04 117 0.03 0.0002 0.004 94.5 0.05
LTC 8/12/1997 0.16 8.39 15.8 1392 8.4 1810 1180 16 0.42 0.05 328 420 0.005 0.001 93.9 0.26 0.04 121 0.009 0.0002 0.004 99.2 0.03
LTC 9111/1997 0.04 8.4 15.7 1370 8.4 1740 1210 5 0.17 0.05 332 550 0.005 0.001 80.6 0.17 0.04 134 0.006 0.0002 0.003 117 0.02
LTC 10/30/1997 0.23 7.7 2.2 1925 8.3 1930 6
LTC 11/1811997 0.03 8.5 4 1430 8.1 1890 1340 6 1.67 0.05 467 560 0.01 0.001 119 0.04 0.04 142 0.016 0.0002 0.004 124 0.04
LTC 12/6/1997 0.2 8.5 3 1320 8.3 1910 5
LTC 1/6/1998 2.4 8.3 0.2 1990 8.2 1930 1410 70 1.59 0.06 451 590 0.006 0.001 113 1.53 0.04 139 0.092 0.0002 0.004 118 0.02
LTC 211911998 0,01 8.3 2140 8.2 2110 46
LTC 3/6/1998 0.01 7.6 3580 7.5 3570 14
LTC 4/911998 3 8.1 1790 8.2 1760 67
LTC 4127/1998 3 8.5 2090 8.4 1370 900 168 1.92 0.05 369 333 0.05 0.005 116 4.77 0.02 89.6 0.1 0.001 0.007 61.9 0.01
LTC 6/11/1998 0.7 8.5 9.9 1424 8.3 1320 22
LTC 716/1998 0.4 8.9 22 1629 8.3 1560 73
LTC 81311998 0.28 8.6 15 1692 8.2 1550 1200 40 1.57 0.05 383 493 0.05 0.005 72.9 0.66 0.02 111 0.02 0.001 0.005 96 0.01
LTC 9/10/1998 0.37 8.6 14.7 1843 8.3 1590 5
LTC 10/8/1998 0.18 8.6 12 1964 8.3 1650 1350 5 1.65 0.05 321 537 0.05 0.005 80.2 0.12 0.02 122 0.02 0.001 0.005 123 0.01
LTC 11/511998 0.3 8.3 8.9 2015 7.8 1810 6
LTC 2122/1999 8.7 5.5 2027 8.1 1860 22
LTC 3/311999 0.76 8.6 7.1 1846 8.1 1830 16
LTC 4/6/1999 1 8.46 2107 8 1860 6
LTC 5/1711999 3 8.48 7.7 1017 8.2 1380 980 86 1.53 0.05 351 362 0.05 0.005 72.4 1.9 0.02 96.5 0.06 0.001 0.005 81.4 0.01
LTC 6/10/1999 0.7 8.59 9.5 1406 8 1270 76
LTC 716/1999 2.1 8.4 17.1 1480 8.1 1470 1040 38 0.76 0.05 314 400 0.05 0.005 63.2 0.51 0.02 102 0.02 0.001 0.005 62.6 0.01
LTC 8/1911999 0.6 8.36 9.8 2008 8.1 1810 5
LTC 913/1999 0.76 8.42 15.8 1406 8.2 1690 6
LTC 10/13/1999 0.51 8.3 2.3 1203 8.2 1950 1600 5 0.72 0.05 405 644 0.05 0.005 70.4 0.09 0.02 170 0.02 0.001 0.005 157 0.01
LTC 11111/1999 0.51 8.2 -0.1 1253 8 2280 7
LTC 12/6/1999 0 8.1 0.1 1331 7.8 2440 5
LTC