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Z L <br />File No. 21-91-009-002-01 <br />May 23, 1991 <br />City of Everett Rainfall 25-Year Storm Design <br />Total Rainfall = 2.6 inches <br />Development of Hyetograph <br />Intensity <br />In/Hr <br />Total rainfall <br />in 20 min. <br />No. of <br />times on <br />hyetogr. <br />Total inches <br />of rainfall <br />% of <br />total <br />rainfall <br />Hyetrogr. <br />value • <br />0.04 <br />0.0133 <br />12 <br />0.1596 <br />0.0599 <br />0.0050 <br />0.05 <br />0.0167 <br />18 <br />0.3006 <br />0.1128 <br />0.0063 <br />0.06 <br />0.0200 <br />8 <br />0.1600 <br />0.0600 <br />0.0075 <br />0.07 <br />0.0233 <br />6 <br />0.1398 <br />0.0525 <br />0.0088 <br />0.08 <br />0.0266 <br />4 <br />0.1064 <br />0.0399 <br />0.0100 <br />0.09 <br />0.0300 <br />4 <br />0.1200 <br />0.0450 <br />10.0113 <br />0.10 <br />0.0333 <br />2 <br />0.0666 <br />0.0250 <br />0.0125 <br />0.11 <br />0.0366 <br />2 ' <br />0.0732 <br />0.0275 <br />0.0138 <br />0.12 <br />0.0400 <br />2 <br />0.0800 <br />0.0300 <br />0.0150 <br />0.13 <br />0.0433 <br />2 <br />0.0866 <br />0.0325 <br />0.0163 <br />0.15 <br />0.0500 <br />2 <br />0.1000 <br />0.0375 <br />0.0188 <br />0.17 <br />0.0566 <br />2 <br />0.1132 <br />0.0425 <br />0.0213 <br />0.21 <br />0.0699 <br />2 <br />0.1398 <br />0.0525 <br />0.0263 <br />0.27 <br />0.0899 <br />2 <br />0.1798 <br />0.0675 <br />0.0338 <br />0.35 1 <br />0.1166 <br />2 <br />0.2332 <br />0.0875 <br />07438 <br />0.91 <br />0.3030 <br />2 <br />6060 <br />0.2274 <br />0.1137 <br />Totals <br />72 <br />F2.6648 <br />1.0000 <br />Hyetograph value = percentage of total rainfall divided by number of times the <br />value appears on the hyetograph. <br />9ePNbOdntJOCgm�evrtran2arm <br />