2008-03-13_REPORT - C1981019 (2)

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Table P -Annual Precipitation at the Colowyo Mine*, 2001 - 2007 )an Feb Mar Apr May )un Jul 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 I _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 i 1.60 2.84 20.22 1990-2007 Avg. 1.05 1.26 1.57 1.72 1.33 1.13 1.25 1.04 2.62 2.15 1.57 1.06 17.74 Chart P Seasonat Precipitation (September -August) at the Colowyo Mine*, 2001- 2007 25 7 year average - 17.74" 20 0 15 'a ' v d a 10 w 0 N d s V 5 C -ti 0 0 0 o g o 0 0 ~ ~ ~ ~ A ~ ~ °o 0 0 0 ~ o o °' a November February May August October January April July °yR ~ September December March June Seasonal Precipitation at the Colowyo Mine" 2006/2007 vs. 7-Year Average 12 10.60 10 ^ 18 Year Avg. ^ 2006/ 2007 m 8 6.04 ~ 6 4.62 4.12 .+ 4 3.42 3.06 3.33 2.4 1 2 n Fall Winter Spring Summer Rio Tinto Energy America/Colowyo Mine Page 5 Revegetation Monitoring - 2007