2011-03-24_REPORT - C1981019 ‎(10)‎

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/24/2011
• Doc Name: 2010 AHR & ARR Part 3
• From: Seneca Coal Company
• To: DRMS
• Annual Report Year: 2010
• Permit Index Doc Type: Hydrology Report
• Email Name: JHB
• Media Type: D
• Archive: No

Table P - Annual Precipitation at the Colowyo Mine*, 2001- 2009
San Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Total
2001 0.53 1.27 1.15 1.18 1.76 0.68 0.96 0.90 1.01 1.19 1.19 0.68 12.50
2002 0.86 0.60 1.17 1.12 0.05 0.75 1.69 0.77 2.69 1.71 1.54 0.56 13.51
2003 0.91 2.73 2.95 2.05 1.57 0.52 0.19 0.93 1.03 0.25 2.84 1.47 17.44
2004 0.66 0.75 0.58 2.86 1.59 0.94 2.42 0.62 3.23 2.31 1.15 0.59 17.70
2005 1.97 1.24 1.59 2.59 2.01 4.50 0.45 1.19 1.35 2.60 1.54 0.64 21.67
2006 1.19 0.71 2.01 1.33 0.64 0.25 1.77 2.02 4.83 4.62 1.15 0.63 21.15
2007 1.21 1.50 1.54 0.92 1.67 0.30 1.27 0.84 4.18 2.38 1.60 2.84 20.22
2008 0.35 1.24 1.14 1.94 2.79 1.08 0.17 2.32 1.94 1.16 1.28 1.81 17.19
2009+ 1.32 0.31 1.99 1.67 1.79 2.42 0.33 0.59 0.85 0.71 0.78 0.81 13.54
2010+ 0.16 0.51 2.05 1.64 1.20 0.64 0.78 1.35 0.34 2.34 1.30 - 12.30
2001-2009 Avg. 0.91 1.09 1.62 1.73 1.51 1.21 1.00 1.15 2.14 1.93 1.44 1.11 16.83
Chart P
Seasonal Precipitation (September - August) at the Colowyo Mine*, 2001- 2010
25 - -- - - -- - - - -- --
20 --- - - --- --
C 10 year average - 17.0"
- - - - - - - - - - - - - - -
a 15
a`
0 10
N
d
L
V
C
5
0 i
y
O O O O O O O O O .4 A Ch 00 Ch
O O O O O O O O O O
•? a
Summer
Seasonal Precipitation at the Colowyo Mine*
2009/2010 vs. 10-Year Average
12
10 ¦ 10 Year Avg.
H 8 ¦2009/2010
d
6 5.68
4.85 4.88

~
4
3.11 3.36
2.76
2.34
1.48
2
0

Fall Winter Spring Summer
* An average of Colowyo Weather Stations SCN16 and WSTPT.
+ In 2009, the WSTPT station was moved to South Taylor, therefore it was replaced by SCN34.
Cedar Creek Associates, Inc. 4 COlowyo Mine
2010 Revegetation Monitoring Report