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Precipitation Record (inches) <br />1992 1993 1994 1995 1996 1997 1998 1999 2000 <br />Jan 0.10 0.94 0.12 0.48 1.68 1.02 0.69 0.58 0.51 <br />Feb 0.51 0.9 0.87 0.68 1.16 0.86 0.99 0.49 0.88 <br />Mar 1.47 2.32 0.65 0.81 0.73 0.45 1.46 0.57 1.49 <br />Apr 1.06 2.29 1.01 2.81 1.85 2.44 1.44 2.78 0.82 <br />May 1.50 1.53 0.24 4.19 1.34 1.01 0.83 1.20 1.18 <br />Jun 1.62 0.13 0.24 2.06 1.14 1.91 3.28 0.39 0.76 <br />Jul 2.04 0.17 0.8 0.39 0.85 1.04 1.98 1.99 1.35 <br />Aug 1.04 0.57 0.58 1.34 0.18 2.74 1.42 1.53 1.93 <br />Sep 0.92 0.12 1.76 1.51 1.35 4.83 0.60 0.52 1.47 <br />Oct 1.25 2.21 0.78 1.50 1.71 1.27 1.65 0.43 0.97 <br />Nov 1.07 0.94 1.09 0.80 1.65 1.09 0.81 0.34 0.75 <br />Dec 0.87 0.52 0.56 0.24 0.55 0.30 0.90 0.33 0.39 <br />Annual Totals 13.45 12.64 8.7 16.81 14.19 18.96 16.05 11.15 12.55 <br />Based on perennial vegetation, which is an indicator of long-term precipitation, the "normal" <br />precipitation for the WRN site is 12-14 inches per year. The distribution of precipitation is <br />important for reclamation. The 1994 precipitation was 8.7 inches and significantly below <br />the normal range, especially during the months of May and August, which resulted in <br />limited vegetative growth. In 1995, (16.81"), 1997 (18.96"), and 1998 (16.05") not only was <br />the precipitation higher than normal, but March -June were especially wet and resulted in <br />higher than normal vegetative production. The 1999 precipitation was lower than normal. <br />The precipitation for 2000 was within the normal range, however the vegetative production <br />was significantly less than average. In the year 2000 the precipitation for May -June was <br />adequate, but due to an extremely dry April, growth was limited and resulted in early <br />maturity of vegetation. Sei' Figure 6-1 for illustration of historical precipitation da4a by <br />month. April typically has the highest and December the lowest precipitation. <br />C~ <br />31 <br />