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<br /> <br />Figure 1. <br />Snowfall as inches of precipitation, and April precipitation: <br />1977 Nov .79 1982 2.21 <br />Dec .95 .60 <br />1978 Jan 1.53 1983 .58 <br />Feb .96 1.20 <br />March 2.34 1.80 <br />Total 6.57 6.39 <br />Mean z 6.48 <br />Rain/Snow April 1.40 2.93 <br />Mean x 2.17 <br />Assumptions: <br />Frozen and saturated ground has a curve number similar to bare soil. <br />C.N.80. <br />o Reclaimed area in April has a curve number of 65, 2+ yr rec. <br />Only 1/2 of the snowfall precipitation is expected to be available for <br />spring runoff due to evaporative losses. <br />Nov-March avg. runoff 3.24 inches. <br />3.24 inches, C.M. 80 = 1.4 inches. <br />(1.4 inches - 12 inches) * 10-acre drainage area = 1.17 acre ft. <br />April average runoff 2.17 inches. <br />2.17 inches. C.N. 65 = .2 inches. <br />(.2 inches ~ 12 inches) * 10-acre drainage area = .17 acre ft. <br />Total potential acre ft Nov-April = 1.34 acre ft. <br />Figure 1. Estimated November thru April precipitation available as runoff, <br />based upon a drainage area of at least ten acres. <br />