2008-02-12_REPORT - C1981041

• Permit No: C1981041
• IBM Index Class Name: REPORT
• Doc Date: 2/12/2008
• Doc Name: 2007 Annual Hydrology Report
• From: J.E. Stover & Associates
• To: DRMS
• Annual Report Year: 2007
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Snowcap Coal Company, Inc.
COTTONWOOD AND RAPID CREEK FLOWS
SWGS-01 Flows
WaterYear October July
1985 3.64 -
1986 - 6.10
1987 - 2.70
1988 1.90 1.71
1989 1.80 0.88
1990 0.71 c0.73
1991 <0.92 <1.24
1992 <0.84 1.67
1993 1.16 2.55
1994 2.05 1.75
1995 1.45 -
1996 1.53 0.85
1997 0.99 0.99
1998 2.78 -
1999 1.55 2.04
2000 1.69 <0.36
2001 c0.43 <0.37
2002 <0.33 -
2003 <0.49 <0.06
2004 c0.01 0.85
2005 1.26 -
2006 2.95 -
2007 2.51 0.86
SWGS-02 Flows
Water Year October July
1985 0.81 0.65
1986 0.79 1.02
1987 0.74 1.02
1988 0.53 0.44
1989 0.38 <0.26
1990 <0.26 <0.26
1991 - <0.26
1992 <0.26 <0.38
1993 <0.26 -
1994 0.62 -
1995 0.35 -
1996 0.86 -
1997 - 0.54
1998 0.84 -
1999 0.67 0.54
2000 0.48 0.34
2001 0.33 0.31
2002 0.30 <0.26
2003 <0.11 <0.04
2004 <0.23 0.26
2005 - >3.50
2006 0.77 0.50
2007 0.53 0.63
SWGS-03 Flows
Water Year October July
1985 1.15 -
1986 - 2.65
1987 - 0.75
1988 0.40 0.92
1989 <0.16 <0.26
1990 <0.16 <0.15
1991 <0.24 <0.50
1992 0.25 0.81
1993 0.43 -
1994 0.80 1.90
1995 0.42 -
1996 0.45 <0.35
1997 - 1.70
1998 0.71 -
1999 0.36 0.89
2000 0.71 0.35
2001 <0.03 <0.09
2002 <0.01 <0.15
2003 <0.02 <0.06
2004 <0.02 0.51
2005 0.58 3.42
zoos 1.ss o.so
2007 0.48 0.70
- Indicates months when less than 1/2 of the month's i nformation was available
< Indicates months when paR or all of the readings ware below the minimum recording
level. Minimum recording levels are: 01 - 0.56 CFS, 02 - 0.26 CFS, and 03 - 0.15 CFS
August
2.31
1.06
0.80
<0.72
<0.56
1.02
1.93
1.53
1.08
0.62
1.37
1.75
<0.33
c0.69
<0.13
<0.02
0.88
2.79
1.30
0.90
August
1.00
0.46
0.57
0.32
<0.26
<0.26
<0.26
<0.26
0.50
<0.26
0.58
0.61
0.48
<0.23
<0.24
<0.26
<0.02
0.32
0.85
0.11
0.62
August
0.58
0.34
0.31
<0.17
<0.15
<0.29
0.43
0.91
0.79
1.11
<0.15
0.75
0.47
<0.05
<0.01
<0.15
0.00
o.oo
0.69
0.13
0.15
September
1.27
1.68
<0.56
<0.70
<0.60
1.06
1.24
1.61
0.88
0.99
1.48
2.10
2.04
<0.65
<0.19
<0.37
<0.12
2.52
1.66
1.64
0.90
September
0.48
0.53
0.48
0.39
<0.26
<0.26
<0.26
<0.28
0.49
<0.26
0.57
<0.26
0.80
0.46
0.52
<0.22
<0.17
<0.26
<0.12
0.76
0.21
0.32
September
0.28
0.20
0.37
<0.15
<0.15
<0.21
0.55
0.49
0.64
0.66
<0.24
0.91
0.34
<0.02
<0.00
<0.04
0.00
0.52
0.96
o.os
0.08
07AHR Table S07-1 02/08