2008-03-13_REPORT - C1981019

• Permit No: C1981019
• IBM Index Class Name: REPORT
• Doc Date: 3/13/2008
• Doc Name: 2007 AHR & ARR Section 1 to 12
• From: Colowyo Coal Company
• To: DRMS
• Annual Report Year: 2007
• Permit Index Doc Type: Hydrology Report
• Email Name: SB1
• Media Type: D
• Archive: No

Colowyo Coal Company
20D7 Annual Ralamatlon and HS'~~gY Repot
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Exhibk 8-3 -Regraded Cwecbord~ SimpLog 1Yackiag Sp:®dahee[
. GRID # . - -DATE '' ,".~ ~. B (mplkp) . Ca (megll) EC ' ., .ESP (%) -.: Mp (merylj.. Na (meq/I) Pb Im0~kul - PH. -. _._ SAR Se ImWscl-

P-18
5-Nov-04
2.79 .,,,.mow ~...
0.83
1.02
4.16
7.50
5.74
-21 25-Aug-0S 3.92 1.81 4.75 12.70 7.70 6.11
-22 25-Au -05 6.89 2.51 22.20 6.37 7.80 1.67
N-18 25-Aug-05 5.35 1.02 4.11 2.29 7.70 1.05
P-18 25-Aug-05 4.01 0.94 3.53 3.09 7.60 1.59
P-17 25-Aug-0S 1.76 0.31 0.88 0.76 7.80 0.66
D-17 25-Aug-OS 1.85 0.33 0.93 0.70 7.60 0.59
P-20 26-Jun-07 0.41 7.70 0.49
P-21 26-Jun-07 1.14 7.80 1.76
0-20 26-Jun-07 0.50 7.90 1.54
0-21 26-Jun-07 0.41 7.80 0.23
0-22 26-Jun-07 1.34 7.80 3.82
N-20 26-Jun-07 1.30 7.60 1.11
N-21 26-Jun-07 1.47 7.60 4.50
N-22 26-Jun-07 1.21 7.60 1.71
M-20 26-Jun-07 0.87 7.60 1.40
M-21 26-Jun-07 1.17 7.70 4.28
M-22 26-Jun-07 3.9t 7.50 3.77
L-20 26Jun-07 0.34 7.80 0.38
L-21 26-Jun-07 3.50 7.50 2.88
L-22 26-Jun-07 2.43 7.60 0.63
K-20 26~1un-07 0.27 7.70 0.26
K-21 26-Jun-07 0.83 7.50 0.47
K-22 26-Jun-07 0.56 7.40 0.34
J-21 26-Jun-07 0.64 8.00 5.55
J-22 26-Jun-07 3.24 7.40 1.50
I-20 26Jun-07 4.93 7.50 6.50
I-21 26-Jun-07 3.44 7.60 6.62
I-22 26-Jun-07 4.11 7.50 5.17
• ;MEAN 0.34 4.88.. 1.31 ' 3.43 " 5.12. 3.95 r ' , ' 2.25 _ 7.50 ;. 2.08 0.03 i -`

`STDDEV .: ^ 0.51' _ ` 3.58 0.82 5.52 4.85 r`, 4.82 .x'..2.10 `. 0.38 '.2.84: 0.05'

-•" # VALUESs ~ 277 305. - 322 287 305 ' r, 305 •`:~ ;"` 277 322 322 A 277 "'

MAX 7.20 23.70 7.30 ' 42.80: , 37.50 " '" 54.90 - , 20.90 ` < ~ ` 8.40 ": , 24.30 ' '` :' 0.47 `_-`

""r" MIN . ~:. 0.00 0.48 0.00" 0.10.. 0.33 ''< 0.18" ,', 0.01 ... ' 8.30 _ 0.20 .. '''0.00....

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