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Month <br />Monthly distribution of <br />evaporation1 <br />Monthly Free Water <br />Surface Evaporation, <br />in feet2 <br />January 3.0% 0.12 <br />February 3.5% 0.14 <br />March 5.5% 0.23 <br />April 9.0% 0.37 <br />May 12.0% 0.49 <br />June 14.5% 0.59 <br />July 15.0% 0.62 <br />August 13.5% 0.55 <br />September 10.0% 0.41 <br />October 7.0% 0.29 <br />November 4.0% 0.16 <br />December 3.0% 0.12 <br />Annual 100.0% 4.10 <br />Table 1 - Monthly Evaporation <br />1 Based on distributions provided in paragraph 11 of general <br />guidelines for substitute water supply plans for sand and <br />gravel pits. <br />2 Based on CDSS digitized contour lines from NOAA Atlas <br />33 Gross evaporation.