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

Colomyn coal Company
Annual Reckmatinn and XydruloBY Report
COLOWYO MINE
Exhibit 2A
Water Quality Data
1983-2008
Lower Taylor Creek
(I.Tcn
Listing of Stream Lab Data
Flow Field Field Field Lab Lab TDS N03+NO2 NH3 Bicarb Ambig. Ambig. SNAmbig. SNAmbig. S1AAmbig. SNAmbig. SW Ambig. SNAmbig. SNAmbig. SNAmbig. SNAmbig. SV%
No datum => Blank Rate pH Temp Conduct pH Conduct -180 TSS as N as N as CaC03 Sulfate P As Ca Fe Pb Mg Mn Hg Se Na Zn
cfs S.U. deg C umho/cm S.U. umho/cm mgA mgA mgA mgA mgA mgA mgA mgA mgA mgA mgA mgA mgA mg/I 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 6/1811987 3/6/1998 2/2511991 3/6/1998 10/5/1989 3/111988 6/28/1985 215/2001 11/18/1997 10/5/1989 3/31/1988 3/1/1998 2/24/1986 2/28/1990 2/2811990 10/12/1988 3/1/1988 2/5
/2001 8/13/1984 10/5/1989 2/28/1990
Min at 1 2/13/2002 6128/ 1985 11/11/1999 5/1911997 2/22/1989 2/28/1990 2/28/1990 3130/1989 217/2000 10/511989 3/5/2001 2/28/1990 9/1111997 1/6/1998 2/5/2001 9/13/1995 4/17/2000 2/2811990 7/111996 6/
1/1993 10/311996 212811990 6/28/1985
# Of Samples 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. SN Ambig. SN Ambig. SN Ambig. SW Ambig. SN Ambig. SNAmbig. SNAmbig. W Ambig. S"
Name Date Rate pH Temp Conduct pH Conduct -180 TSS as N as N as CaC03 Sulfate P As Ca Fe Pb Mg Mn Hg Se Na Zn

--- - -- -- cfs
----- S.U. deg C
----- umho/cm
-- S.U. umho/cm mgA
----- - mgA
----- - mgA
--- mgA mgA mgA mgA mgA mgA mgA mgA
-
----
- - mgA
-------- mgA
--------- mgA mgA mgA mgA
------- --- - ---- - - -----
LTC 9/16/2004 0 --
--- ---- -------- --------- ------ - - -
-
-
LTC 10/5/2004 0
LTC 11/1/2004 0
LTC 12/14/2004 0
LTC 1/6/2005 0
LTC 2/10/2005 0
LTC 3/9/2005 0
LTC 4/20/2005 0
LTC 5/23/2005 0
LTC 6/21/2005 0
LTC 7/19/2005 0
LTC 8/22/2005 0
LTC 9/14/2005 0
LTC 10/17/2005 0
LTC 11/21/2005 0
LTC 12/13/2005 0
LTC 1/18/2006 0
LTC 2/21/2006 0
LTC 3115/2006 0
LTC 4/12/2006 0
LTC 5118/2006 0
LTC 6/6/2006 0
LTC 7/25/2006 0
LTC 8123/2006 0
LTC 9120/2006 0
LTC 10116/2006 0
LTC 11/15/2006 0
LTC 12113/2006 0
LTC 1/11/2007 0
LTC 2/7/2007 0
LTC 1/13/2007 0
LTC 4/9/2007 0
LTC 5/15/2007 0
LTC 6/1112007 0
LTC 7/17/2007 0
LTC 8/14/2007 0
LTC