2010-08-02_REVISION - M1977300 (37)

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Environmental Protection Plan, Schwartzwalder Mine 13-2 i Table 13-2. Monthly Precipitation at Ralston Reservoir • JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YR 1978 0.00 z 0.00 z 0.00 z 0.00 z 5.52 1.50 0.61 0.43 0.43 1.81 0.60 1.03 11.93 1979 0.68 0.39 2.09 1.83 4.61 3.31 0.43 3.25 0.34 1.26 2.31 1.34 21.84 1980 0.61 0.54 1.84 3.04 4.94 0.54 2.06 0.85 1.06 0.24 0.68 0.14 16.54 1981 0.08 0.57 2.77 1.22 4.11 0.44 1.74 1.20 0.49 1.27 0.40 0.96 15.25 1982 0.28 0.28 0.78 0.40 4.66 1.52 2.14 3.22 2.67 1.18 0.31 1.80 19.24 1983 0.06 0.15 5.47 1.94 5.28 3.94 2.17 1.50 0.51 0.27 3.32 0.73 25.34 1984 0.18 1.36 a 1.80 3.03 0.63 2.03 1.84 2.28 0.86 3.79 0.00 0.23 18.03 1985 0.61 1.05 0.95 1.86 2.09 1.79 1.54 0.15 1.70 0.34 2.11 0.68 14.87 1986 0.00 z 1.00 0.76 3.53 2.93 2.67 1.33 1.05 0.70 2.20 1.71 0.92 18.80 1987 0.92 1.68 1.82 1.88 4.01 5.17 0.58 2.15 0.60 1.30 1.24 1.81 23.16 1988 0.47 0.80 1.62 0.90 3.21 1.44 1.21 1.11 1.32 0.18 0.40 1.41 14.07 1989 1.16 0.92 0.55 1.53 2.02 2.93 1.86 2.21 2.70 0.57 0.58 1.16 18.19 1990 0.46 0.44 4.72 1.99 1.96 0.22 2.72 1.91 3.03 0.66 1.22 0.18 19.51 1991 0.80 0.12 0.35 2.19 3.93 3.36 2.82 2.49 0.99 0.77 2.99 0.02 20.83 1992 0.69 0.00 5.52 0.27 1.15 1.90 1.14 3.48 0.08 0.66 1.72 0.54 17.15 1993 0.14 0.50 2.12 1.87 1.38 1.81 0.85 0.61 2.10 1.54 1.40 0.33 14.65 1994 0.47 0.80 1.56 3.35 0.94 1.15 0.60 2.15 0.52 0.64 1.51 0.26 13.95 1995 0.46 0.96 1.20 4.86 6.55 3.85 0.70 0.52 1.85 0.23 0.88 0.09 22.15 1996 0.95 0.19 a 1.54 1.23 5.06 1.46 0.89 0.46 3.75 0.53 0.84 0.33 17.23 1997 0.52 1.30 0.33 b 4.31 1.10 2.91 1.80 3.22 1.43 a 2.65 1.17 b 0.92 21.66 1998 0.85 0.14 2.86 4.13 2.68 b 1.51 b 2.16 b 1.84 a 1.16 b 1.60 0.00 z 0.89 a 19.82 1999 0.60 b 0.25 d 0.50 5.67 3.84 2.51 3.47 4.88 2.23 1.05 a 0.55 0.87 26.42 2000 0.74 0.42 1.62 1.33 1.49 a 1.63 4.47 b 2.51 2.00 a 0.81 a 0.52 0.40 17.94 2001 0.55 0.67 a 1.54 2.18 3.32 1.19 2.35 3.50 2.41 0.40 0.89 0.40 19.40 2002 0.60 0.34 0.95 0.02 2.82 0.45 0.58 1.66 b 2.29 1.71 a 0.43 0.00 a 11.85 2003 0.06 1.57 4.43 3.30 1.44 1.54 0.61 1.38 0.25 0.18 0.37 0.65 15.78 2004 0.49 1.31 0.64 4.26 1.21 3.23 2.14 3.48 1.38 2.38 2.07 0.31 22.90 2005 1.34 0.09 0.93 3.98 1.43 2.03 0.54 3.85 b 0.39 2.27 0.55 0.20 17.60 2006 0.43 0.45 1.38 0.60 0.47 0.47 2.34 4.29 0.89 2.75 0.84 3.08 17.99 2007 1.89 0.65 1.60 3.31 3.05 0.38 0.64 2.29 g 0.03 p 0.00 z 0.00 z 0.00 z 11.52 z 2008 0.41 0.62 1.15 0.9 2.12 a 0.86 0.1 3.54 1.82 1.06 0.35 1.07 14 2009 1.17 0.29 1.63 5.34 b 0 z 2.93 2.02 0.54 0.79 3.52 0.92 0.91 20.06 2010 0.23 1.16 a 2.73 3.85 2.03 0 z 0 z 0 z 0 z 0 z 0 z 0 z 10.0 z Period of Record Statistics • JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL MEAN 0.61 0.66 1.87 2.5 2.87 1.96 1.58 2.12 1.36 1.29 1.07 0.8 18.43 S.D. 0.4 0.46 1.39 1.53 1.63 1.21 0.99 1.29 0.93 0.97 0.81 0.68 3.68 SKEW 1.12 0.6 1.43 0.3 0.42 0.62 0.79 0.27 0.7 0.92 1.18 1.37 0.37 MAX 1.89 1.68 5.52 5.67 6.55 5.17 4.47 4.88 3.75 3.79 3.32 3.08 26.42 MIN 0.06 0 0.33 0.02 0.47 0.22 0.1 0.15 0.08 0.18 0 0 11.85 # YRS 31 32 32 32 32 32 32 31 32 32 31 32 27 SOURCE: Western Regional Climate Center (WRCC), data download for station 056816 (Ralston Reservoir, Colorado), file last updated on June 25, 2010 NOTES: SD = Standard deviation Provisional Data after 2/2010 a = 1 day missing, b = 2 days missing, c = 3 days, ..etc, z = 26 or more days missing, A = Accumulations present Long-term means based on columns; thus, the monthly row may not sum (or average) to the long-term annual value. MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5 (Individual Months not used for annual or monthly statistics if more than 5 days are missing.) Individual Years not used for annual statistics if any month in that year has more than 5 days missing. 4109C.100731 Whetstone Associates